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1. A combination of five mechanisms confers a high tolerance for aluminum to a wild species of Poaceae, Andropogon virginicus L.

Author:
Bunichi Ezaki; Kottapalli Jayaram; Aiko Higashi; Kenkou Takahashi
Source:
Environmental and experimental botany 2013 v.93 pp. 35-44
ISSN:
0098-8472
Subject:
Andropogon virginicus; DNA fragmentation; aluminum; citrates; deformation; enzymes; ions; leaves; lipids; malates; nitric oxide; peroxides; roots; sap; secretion; shoots; toxicity; trichomes
Abstract:
... How can high tolerance against aluminum (Al) toxicity be obtained in plants? To address this question, tolerant mechanisms were characterized in a highly Al tolerant wild species of Poaceae, Andropogon virginicus L. A. virginicus showed an Al-stress-induced synthesis and secretion of citrate and malate in roots. This mechanism may help to suppress an increase of toxic Al ions in the root region. M ...
DOI:
10.1016/j.envexpbot.2013.05.002

2. A de novo synthesis citrate transporter, Vigna umbellata multidrug and toxic compound extrusion, implicates in Al‐activated citrate efflux in rice bean (Vigna umbellata) root apex

Author:
XIAO YING YANG; JIAN LI YANG; YUAN ZHOU; MIGUEL A. PIÑEROS; LEON V. KOCHIAN; GUI XIN LI; SHAO JIAN ZHENG
Source:
Plant, cell and environment 2011 v.34 no.12 pp. 2138-2148
ISSN:
0140-7791
Subject:
Arabidopsis; Vigna umbellata; Xenopus; anions; barley; citrates; clones; corn; gene expression; genes; leaves; oocytes; plasma membrane; resistance mechanisms; roots; tomatoes; toxicity; transporters
Abstract:
... Al‐activated organic acid anion efflux from roots is an important Al resistance mechanism in plants. We have conducted homologous cloning and isolated Vigna umbellata multidrug and toxic compound extrusion (VuMATE), a gene encoding a de novo citrate transporter from rice bean. Al treatment up‐regulated VuMATE expression in the root apex, but neither in the mature root region nor in the leaf. The d ...
DOI:
10.1111/j.1365-3040.2011.02410.x
PubMed:
21848845

3. ATP-Citrate Lyase Gene (SoACLA-1), a Novel ACLA Gene in Sugarcane, and Its Overexpression Enhance Drought Tolerance of Transgenic Tobacco

Author:
Thi-Thu Phan; Jian Li; Bo Sun; Jia-Yi Liu; Wen-Hui Zhao; Chan Huang; Li-Tao Yang; Yang-Rui Li
Source:
Sugar tech 2017 v.19 no.3 pp. 258-269
ISSN:
0972-1525
Subject:
abscisic acid; acetyl coenzyme A; catalase; chlorophyll; citrates; cracking; cytoplasm; drought; drought tolerance; gene overexpression; genes; growth and development; hydrogen peroxide; malondialdehyde; peroxidase; phylogeny; polyethylene glycol; polymerase chain reaction; roots; stress response; sugarcane; superoxide dismutase; tobacco; transgenic plants; water content; water stress
Abstract:
... ATP-citrate lyase catalyzes cracking citrate to produce acetyl CoA in the cytoplasm and plays an important role in normal growth and development of plants. In this study, SoACLA-1 gene in sugarcane was cloned and characterized. The amino acid sequence of SoACLA-1 showed high homology with other ACLAs families, and they were clustered together in the phylogenetic tree. On transcript level, SoACLA-1 ...
DOI:
10.1007/s12355-016-0464-8

4. Accumulation and distribution of iron, cadmium, lead and nickel in cucumber plants grown in hydroponics containing two different chelated iron supplies

Author:
Árpád Csog; Victor G. Mihucz; Enikő Tatár; Ferenc Fodor; István Virág; Cornelia Majdik; Gyula Záray
Source:
Journal of plant physiology 2011 v.168 no.10 pp. 1038-1044
ISSN:
0176-1617
Subject:
EDTA (chelating agent); X-radiation; cadmium; citrates; cotyledons; cucumbers; heavy metals; hydroponics; iron; lead; leaves; nickel; roots; shoots; spectroscopy; stems
Abstract:
... Cucumber plants grown in hydroponics containing 10μM Cd(II), Ni(II) and Pb(II), and iron supplied as Fe(III) EDTA or Fe(III) citrate in identical concentrations, were investigated by total-reflection X-ray fluorescence spectrometry with special emphasis on the determination of iron accumulation and distribution within the different plant compartments (root, stem, cotyledon and leaves). The extent ...
DOI:
10.1016/j.jplph.2010.12.014
PubMed:
21342715

5. Accumulation and tolerance of lead in two contrasting ecotypes of Dianthus carthusianorum

Author:
Małgorzata Wójcik; Anna Tukiendorf
Source:
Phytochemistry 2014 v.100 pp. 60-65
ISSN:
0031-9422
Subject:
Dianthus carthusianorum; citrates; ecotypes; genetics; glutathione; hydroponics; lead; malates; phytochelatins; roots; Poland
Abstract:
... Dianthus carthusianorum is one of the dominant plant species colonising the Zn–Pb waste deposits in Bolesław, Southern Poland. It differs in terms of morphology and genetics from ecotypes inhabiting non-metal-polluted areas. The response of waste-heap (metallicolous, M) and reference (nonmetallicolous, NM) ecotypes of D. carthusianorum to Pb in hydroponics was investigated and compared in this stu ...
DOI:
10.1016/j.phytochem.2014.01.008

6. Accumulation of low-molecular-weight organic acids in roots and leaf segments of Zea mays plants treated with cadmium and copper

Author:
Sławomir Dresler; Agnieszka Hanaka; Wiesław Bednarek; Waldemar Maksymiec
Source:
Acta physiologiae plantarum 2014 v.36 no.6 pp. 1565-1575
ISSN:
0137-5881
Subject:
Zea mays; cadmium; chlorophyll; citrates; copper; corn; leaves; malates; roots; seedlings; shoots
Abstract:
... Maize seedlings grown in a nutrient solution were treated with Cd (50, 100 µM) or Cu (50, 100 µM). Roots and separated leaf sections (from the youngest––basal, through the middle––mature, to the oldest––apical) were analysed. Shoot and root fresh weight, and root net growth rates were reduced significantly after Cu application in comparison to Cd. Copper (50, 100 µM) and cadmium (100 µM) decreased ...
DOI:
10.1007/s11738-014-1532-x

7. Adaptation and tolerance mechanisms developed by mycorrhizal Bipinnula fimbriata plantlets (Orchidaceae) in a heavy metal-polluted ecosystem

Author:
Héctor Herrera; Rafael Valadares; Guilherme Oliveira; Alejandra Fuentes; Leonardo Almonacid; Sidney Vasconcelos do Nascimento; Yoav Bashan; Cesar Arriagada
Source:
Mycorrhiza 2018 v.28 no.7 pp. 651-663
ISSN:
0940-6360
Subject:
Orchidaceae; biochemical pathways; biomass; biosynthesis; carbon metabolism; carotenoids; cell walls; citrates; cytoskeleton; defense mechanisms; ecosystems; enzymes; exudation; greenhouses; heavy metals; malates; mineral content; mycorrhizae; mycorrhizal fungi; pathogens; phenolic compounds; phosphorus; plantlets; polluted soils; protein synthesis; proteins; proteome; proteomics; roots; sucrose
Abstract:
... The adaptation and performance of orchid mycorrhizae in heavy metal-polluted soils have been poorly explored. In the present study, proteomic and metabolic approaches were used to detect physiological changes in orchid roots established in a heavy metal-polluted soil and to ascertain whether mycorrhizal fungi affect the metabolic responses of roots. Young Bipinnula fimbriata plantlets were establi ...
DOI:
10.1007/s00572-018-0858-4

8. Al-enhanced Expression and Interaction of 14-3-3 Protein and Plasma Membrane H⁺-ATPase is Related to Al-induced Citrate Secretion in an Al-resistant Black Soybean

Author:
Chuan-Long Guo; Qi Chen; Xiu-Ling Zhao; Xuan-qian Chen; Yan Zhao; Lin Wang; Kui-Zhi Li; Yong-Xiong Yu; Li-Mei Chen
Source:
Plant molecular biology reporter 2013 v.31 no.4 pp. 1012-1024
ISSN:
0735-9640
Subject:
citrates; correlation; exudation; genes; phosphorylation; plasma membrane; roots; secretion; soybeans; transcription (genetics)
Abstract:
... The up-regulated expression of plasma membrane (PM) H+-ATPase is related to Al-enhanced citrate exudation in soybean. Moreover, the interaction with a 14-3-3 protein can activate PM H+-ATPase. This study investigated if the expression and interaction level of the 14-3-3 protein and PM H+-ATPase is associated with PM H+-ATPase activity as well as citrate secretion in Al-tolerant (RB) and Al-sensiti ...
DOI:
10.1007/s11105-013-0569-0

9. Altered levels of AtHSCB disrupts iron translocation from roots to shoots

Author:
Laura Leaden; María A. Pagani; Manuel Balparda; María V. Busi; Diego F. Gomez-Casati
Source:
Plant molecular biology 2016 v.92 no.4-5 pp. 613-628
ISSN:
0167-4412
Subject:
Arabidopsis thaliana; aerial parts; biosynthesis; citrates; gene overexpression; homeostasis; iron; iron absorption; mitochondria; mutants; nutrient deficiencies; phenotype; roots; shoots
Abstract:
... KEY MESSAGE: Plants overexpressing AtHSCB and hscb knockdown mutants showed altered iron homeostasis. The overexpression of AtHSCB led to activation of the iron uptake system and iron accumulation in roots without concomitant transport to shoots, resulting in reduced iron content in the aerial parts of plants. By contrast, hscb knockdown mutants presented the opposite phenotype, with iron accumula ...
DOI:
10.1007/s11103-016-0537-9

10. Aluminum induced physiological and proteomic responses in tea (Camellia sinensis) roots and leaves

Author:
Qingshan Xu; Yu Wang; Zhaotang Ding; Kai Fan; Dexin Ma; Yongliang Zhang; Qi Yin
Source:
Plant physiology and biochemistry 2017 v.115 pp. 141-151
ISSN:
0981-9428
Subject:
Camellia sinensis; acid soils; aluminum; antioxidants; ascorbate peroxidase; biochemical pathways; catalase; citrates; enzyme activity; glutathione transferase; glycolysis; hyperaccumulators; leaves; lignin; phenolic acids; photosynthesis; protein synthesis; proteins; proteomics; roots; tea
Abstract:
... Tea (Camellia sinensis (L.) O. Kuntze), is an aluminum (Al) hyperaccumulator and grows well in acid soils. Although Al-induced growth of tea plant has been studied, the proteomic profiles of tea plants in response to Al are unclear. In the present study, the proteomic profiles in tea roots and leaves under Al stress were investigated using iTRAQ proteomics approach. In total, 755 and 1059 differen ...
DOI:
10.1016/j.plaphy.2017.03.017

11. Aluminum tolerance in Centipedegrass (Eremochloa ophiuroides [Munro] Hack.): Excluding Al from root

Author:
Jun Yan; Jingbo Chen; Li Yu; Jianxiu Liu
Source:
Scientia horticulturae 2012 v.143 no. pp. 212-219
ISSN:
0304-4238
Subject:
C4 plants; Eremochloa ophiuroides; acid soils; acid tolerance; aluminum; citrates; grasses; lanthanum; metal tolerance; phosphorus; root exudates; roots; secretion; starvation; China
Abstract:
... Centipedegrass (Eremochloa ophiuroides [Munro] Hack.) is a C4 perennial grass and well adapted to acid soils. Centipedegrass accession E041 (Lingchuan, Guangxi Province, China) was found to be more tolerant to Aluminum (Al) than E006 (Nanjing, Jiangsu Province, China). The objective of this study was to identify possible mechanisms associated with centipedegrass. After exposure to Al, citrate was ...
DOI:
10.1016/j.scienta.2012.06.001

12. Aluminum-activated citrate and malate transporters from the MATE and ALMT families function independently to confer Arabidopsis aluminum tolerance

Author:
Liu, Jiping; Magalhaes, Jurandir V.; Shaff, Jon; Kochian, Leon V.
Source:
plant journal 2009 v.57 no.3 pp. 389-399
ISSN:
0960-7412
Subject:
Arabidopsis; aluminum; barley; citrates; exudation; genes; mutants; roots; transcription factors; transfer DNA; transporters
Abstract:
... Aluminum-activated root malate and citrate exudation play an important role in plant Al tolerance. This paper characterizes AtMATE, a homolog of the recently discovered sorghum and barley Al-tolerance genes, shown here to encode an Al-activated citrate transporter in Arabidopsis. Together with the previously characterized Al-activated malate transporter, AtALMT1, this discovery allowed us to exami ...
DOI:
10.1111/j.1365-313X.2008.03696.x
PubMed:
18826429

13. An Al‐inducible MATE gene is involved in external detoxification of Al in rice

Author:
Kengo Yokosho; Naoki Yamaji; Jian Feng Ma
Source:
plant journal 2011 v.68 no.6 pp. 1061-1069
ISSN:
0960-7412
Subject:
Oryza sativa; Xenopus; aluminum; citrates; cultivars; genes; onions; oocytes; plasma membrane; rice; roots; sap; secretion; transcription factors; xylem; zinc finger motif
Abstract:
... A number of plant species, including rice, secretes citrate from roots in response to Al stress. Here we characterized the functions of a gene, OsFRDL4 (Os01g0919100) that belongs to the multidrug and toxic compound extrusion (MATE) family in rice (Oryza sativa). Heterologous expression in Xenopus oocyte showed that the OsFRDL4 protein was able to transport citrate and was activated by Al. The exp ...
DOI:
10.1111/j.1365-313X.2011.04757.x
PubMed:
21880027

14. An in vitro screening system to assess aluminum toxicity in sugarcane (Saccharum spp.) cultivars

Author:
S. J. Snyman; M. Naidoo; M. P. Watt; R. S. Rutherford
Source:
In vitro cellular & developmental biology 2019 v.55 no.4 pp. 403-408
ISSN:
1054-5476
Subject:
Saccharum; agricultural soils; aluminum; ammonium; citrates; crop production; cultivars; culture media; drought; exudation; in vitro studies; inheritance (genetics); lethal concentration 50; mutagenesis; mutagens; nitrates; nitrogen; nutrient use efficiency; plantlets; regrowth; roots; screening; soil pH; sugarcane; toxicity; South Africa
Abstract:
... Mutagenic breeding is an approach being developed especially for those characteristics that are not inherited through conventional genetic hybridization. Soil acidity and aluminum (Al³⁺) toxicity limit sugarcane production, particularly in leached soils in the coastal cultivation regions in South Africa. An in vitro screening procedure was developed based on plantlet re-rooting in Al³⁺-containing ...
DOI:
10.1007/s11627-019-09994-2

15. Arbuscular mycorrhizal fungus colonization in Nicotiana tabacum decreases the rate of both carboxylate exudation and root respiration and increases plant growth under phosphorus limitation

Author:
Néstor Fernández Del-Saz; Antonia Romero-Munar; Gregory R. Cawthray; Ricardo Aroca; Elena Baraza; Jaume Flexas; Hans Lambers; Miquel Ribas-Carbó
Source:
Plant and soil 2017 v.416 no.1-2 pp. 97-106
ISSN:
0032-079X
Subject:
Nicotiana tabacum; biomass production; citrates; exudation; malates; mycorrhizal fungi; nutrient uptake; phosphorus; plant growth; respiratory rate; rhizosphere; root exudates; roots; sand; tobacco; vesicular arbuscular mycorrhizae
Abstract:
... BACKGROUND AND AIMS: Under phosphorus (P) limitation, plants tend to maximize their efficiency of P acquisition by increasing the exudation of root carboxylates, such as citrate, whose synthesis is mediated by respiration via the alternative oxidase (AOX) in cluster roots. However, high respiratory costs related to nutrient uptake are associated with slower plant growth, whereas arbuscular mycorrh ...
DOI:
10.1007/s11104-017-3188-y

16. Assessment of indium toxicity to the model plant Arabidopsis

Author:
Hsin-Fang Chang; Shan-Li Wang; Der-Chuen Lee; Silver Sung-Yun Hsiao; Yohey Hashimoto; Kuo-Chen Yeh
Source:
Journal of hazardous materials 2020 v.387 pp. 121983
ISSN:
0304-3894
Subject:
Arabidopsis thaliana; citrates; ecosystems; endodermis; extracellular space; indium; monitoring; nutrition; oxidative stress; phosphates; phosphorus; physiological response; risk assessment; roots; secretion; semiconductors; toxicity; transporters; xylem
Abstract:
... The use of indium in semiconductor products has increased markedly in recent years. The release of indium into the ecosystem is inevitable. Under such circumstances, effective and accurate assessment of indium risk is important. An indispensable aspect of indium risk assessment is to understand the interactions of indium with plants, which are fundamental components of all ecosystems. Physiologica ...
DOI:
10.1016/j.jhazmat.2019.121983

17. Assessment of physiological and biochemical responses, metal tolerance and accumulation in two eucalypt hybrid clones for phytoremediation of cadmium-contaminated waters

Author:
Fabrizio Pietrini; Valentina Iori; Daniele Bianconi; Giovanni Mughini; Angelo Massacci; Massimo Zacchini
Source:
Journal of environmental management 2015 v.162 pp. 221-231
ISSN:
0301-4797
Subject:
Eucalyptus camaldulensis; Eucalyptus globulus; bioaccumulation; cadmium; chlorophyll; citrates; clones; cysteine; ecological restoration; fluorescence; genotype; glutathione; growth retardation; hybrids; leaves; metal tolerance; oxalates; photosynthesis; phytoremediation; plant organs; polyamines; roots; thiols; toxicity; transpiration
Abstract:
... Eucalyptus is a promising species for ecological restoration but plant performances under environmental constraints need to be better investigated. In particular, the toxic effects of metals on this plant species are poorly described in the literature. In this work, morpho-physiological and biochemical responses to cadmium were analysed in two eucalypt genotypes (hybrid clones of Eucalyptus camald ...
DOI:
10.1016/j.jenvman.2015.07.053

18. Balanced allocation of organic acids and biomass for phosphorus and nitrogen demand in the fynbos legume Podalyria calyptrata

Author:
Pravin M. Maistry; A. Muthama Muasya; Alex J. Valentine; Samson B.M. Chimphango
Source:
Journal of plant physiology 2015 v.174 pp. 16-25
ISSN:
0176-1617
Subject:
Podalyria calyptrata; acid phosphatase; biomass; calcium nitrate; citrates; exudation; fynbos; leaves; legumes; malate dehydrogenase; nitrogen; nitrogen fixation; nodulation; phosphoenolpyruvate carboxylase; phosphorus; plant growth; root exudates; roots; soil
Abstract:
... Podalyria calyptrata is from fynbos soils with low availability of phosphorus (P) and nitrogen (N). We investigated the physiological basis for tolerance of low P supply in nodulated P. calyptrata and examined responses to increased supply of combined-N as Ca(NO3)2 and P. It was hypothesized that increasing supply of combined-N would stimulate P-acquisition mechanisms and enhance plant growth with ...
DOI:
10.1016/j.jplph.2014.10.005

19. Bioavailability of zinc and phosphorus in calcareous soils as affected by citrate exudation

Author:
Andreas Duffner; Ellis Hoffland; Erwin J. M. Temminghoff
Source:
Plant and soil 2012 v.361 no.1-2 pp. 165-175
ISSN:
0032-079X
Subject:
Lupinus albus; bioavailability; calcareous soils; citrates; crop production; exudation; nutrient solutions; phosphorus; plant response; rhizosphere; roots; soil solution; zinc
Abstract:
... AIMS: Zinc (Zn) and phosphorus (P) deficiency often occurs at the same time and limits crop production in many soils. It has been suggested that citrate root exudation is a response of plants to both deficiencies. We used white lupin (Lupinus albus L.) as a model plant to clarify if citrate exuded by roots could increase the bioavailability of Zn and P in calcareous soils. METHODS: White lupin was ...
DOI:
10.1007/s11104-012-1273-9

20. Biodegradation of low molecular weight organic acids in rhizosphere soils from a tropical montane rain forest

Author:
Kazumichi Fujii; Maya Aoki; Kanehiro Kitayama
Source:
Soil biology & biochemistry 2012 v.47 no. pp. 142-148
ISSN:
0038-0717
Subject:
age of soil; anions; biodegradation; citrates; climate; exudation; malates; microorganisms; mineralization; molecular weight; parents; phosphorus; quaternary deposits; rhizosphere; roots; sedimentary rocks; soil solution; sorption; tropical rain forests; tropical soils; Borneo
Abstract:
... Root exudation of organic acids could be an important strategy for plant acquisition of phosphorus (P) from P-deficient soils in tropical rain forests. However, the efficacy of organic acids on P mobilization in the rhizosphere could be reduced due to their rapid biodegradation by rhizosphere microorganisms. To assess the dynamics and function of organic acids in the rhizosphere soils in tropical ...
DOI:
10.1016/j.soilbio.2011.12.018

21. Boron-aluminum interactions affect organic acid metabolism more in leaves than in roots of Citrus grandis seedlings

Author:
N. Tang; H. -X. Jiang; L. -T. Yang; Q. Li; G. -H. Yang; L. -S. Chen
Source:
Biologia plantarum 2011 v.55 no.4 pp. 681-688
ISSN:
0006-3134
Subject:
Citrus maxima; aluminum; boron; citrates; enzymes; leaves; malates; metabolism; pummelos; roots; seedlings; water
Abstract:
... Sour pummelo (Citrus grandis) seedlings were irrigated with nutrient solution containing four boron concentrations (i.e., 2.5, 10, 25 and 50 μM H3BO3) and two aluminum concentrations [i.e., 0 (-Al) and 1.2 mM AlCl3 · 6 H2O (+Al)]. It was found that B did not affect, but Al increased, the Al content in the roots. The Al and citrate contents in the -Al leaves either did not change or slightly increa ...
DOI:
10.1007/s10535-011-0168-6

22. Brachypodium distachyon: a model species for aluminium tolerance in Poaceae

Author:
Roberto Contreras; Ana M. Figueiras; Francisco J. Gallego; Cesar Benito
Source:
Functional plant biology 2014 v.41 no.12 pp. 1270-1283
ISSN:
1445-4408
Subject:
Arabidopsis; Brachypodium distachyon; abiotic stress; acid soils; aluminum; barley; cell death; citrates; diploidy; exudation; gene expression; genes; hydrogen peroxide; lipid peroxidation; malates; messenger RNA; oats; promoter regions; quantitative polymerase chain reaction; reverse transcriptase polymerase chain reaction; rice; roots; rye; toxicity; transporters
Abstract:
... Aluminium (Al) toxicity is the main abiotic stress limiting plant productivity in acidic soils. Studies on Al tolerance have been conducted in Poaceae but their genomes are very complex. Fifty-nine diploid lines (2n=10) of Brachypodium distachyon (L.) P. Beauv. and 37 allotetraploid samples (2n=30) of Brachypodium hybridum Catalán, Joch. Müll., Hasterok & Jenkins sp. nov. were used to evaluate the ...
DOI:
10.1071/FP13362

23. Brassica oleracea MATE Encodes a Citrate Transporter and Enhances Aluminum Tolerance in Arabidopsis thaliana

Author:
Xinxin Wu; Ren Li; Jin Shi; Jinfang Wang; Qianqian Sun; Haijun Zhang; Yanxia Xing; Yan Qi; Na Zhang; Yang-Dong Guo
Source:
Plant & cell physiology 2014 v.55 no.8 pp. 1426-1436
ISSN:
0032-0781
Subject:
Arabidopsis thaliana; Brassica oleracea; Xenopus; aluminum; anions; cabbage; citrates; electrophysiology; extrusion; gene overexpression; genes; genetically modified organisms; onions; oocytes; plasma membrane; potassium; roots; secretion; shoots; toxic substances
Abstract:
... The secretion of organic acid anions from roots is an important mechanism for plant aluminum (Al) tolerance. Here we report cloning and characterizing BoMATE (KF031944), a multidrug and toxic compound extrusion (MATE) family gene from cabbage (Brassica oleracea). The expression of BoMATE was more abundant in roots than in shoots, and it was highly induced by Al treatment. The ¹⁴C-citrate efflux ex ...
DOI:
10.1093/pcp/pcu067

24. Cadmium impairs iron homeostasis in Arabidopsis thaliana by increasing the polysaccharide contents and the iron-binding capacity of root cell walls

Author:
Shan Shan Xu; Si Zu Lin; Zhong Xiong Lai
Source:
Plant and soil 2015 v.392 no.1-2 pp. 71-85
ISSN:
0032-079X
Subject:
Arabidopsis thaliana; apoplast; binding capacity; cadmium; cell walls; citrates; genes; hemicellulose; homeostasis; iron; leaves; methylation; pectinesterase; pectins; roots; shoots; toxicity
Abstract:
... BACKGROUND AND AIMS: Iron (Fe) deficiency is a well-known symptom of cadmium (Cd) toxicity. Here, the mechanisms underlying Cd impairment of Fe homeostasis in Arabidopsis were investigated. METHODS: Arabidopsis plants were subjected to 0 (CK) or 10 μM Cd treatments. After the treatments period, Fe concentrations, expression levels of Fe uptake- and translocation-related genes, polysaccharide conce ...
DOI:
10.1007/s11104-015-2443-3

25. Cadmium uptake by durum wheat in presence of citrate

Author:
Panfili, Frédéric; Schneider, André; Vives, Alain; Perrot, Frédéric; Hubert, Philippe; Pellerin, Sylvain
Source:
Plant and soil 2009 v.316 no.1-2 pp. 299-309
ISSN:
0032-079X
Subject:
Triticum turgidum; aerial parts; cadmium; citrates; dissociation; durum wheat; hydroponics; nutrient solutions; roots; seedlings
Abstract:
... The aim of this study was to determine the mechanisms underlying the uptake of Cd by durum wheat (Triticum turgidum L. ssp. durum cv. “acalou”) in the presence of citrate under hydroponic conditions. Wheat seedlings were exposed for 3 h to simplified nutrient solutions initially containing 35 nM of free Cd with or without citrate. Uptake experiments with citrate alone were also performed. Solution ...
DOI:
10.1007/s11104-008-9782-2

26. Can citrate efflux from roots improve phosphorus uptake by plants? Testing the hypothesis with near‐isogenic lines of wheat

Author:
Peter R. Ryan; Richard A. James; Chandrakumara Weligama; Emmanuel Delhaize; Allan Rattey; David C. Lewis; William D. Bovill; Glenn McDonald; Tina M. Rathjen; Enli Wang; Neil A. Fettell; Alan E. Richardson
Source:
Physiologia plantarum 2014 v.151 no.3 pp. 230-242
ISSN:
0031-9317
Subject:
Triticum aestivum; anions; biomass production; citrates; cultivars; field experimentation; greenhouse experimentation; malates; models; phosphorus; roots; shoots; soil types; wheat
Abstract:
... Phosphorus (P) deficiency in some plant species triggers the release of organic anions such as citrate and malate from roots. These anions are widely suggested to enhance the availability of phosphate for plant uptake by mobilizing sparingly‐soluble forms in the soil. Carazinho is an old wheat (Triticum aestivum) cultivar from Brazil, which secretes citrate constitutively from its root apices, and ...
DOI:
10.1111/ppl.12150
PubMed:
24433537

27. Carboxylate metabolism changes induced by Fe deficiency in barley, a Strategy II plant species

Author:
Ana-Flor López-Millán; Michael A. Grusak; Javier Abadía
Source:
Journal of plant physiology 2012 v.169 no.11 pp. 1121-1124
ISSN:
0176-1617
Subject:
leaf extracts; cultivars; citrates; barley; pyruvate decarboxylase; NADP-glucose-6-phosphate dehydrogenase; Hordeum vulgare; malate dehydrogenase; phosphoenolpyruvate carboxylase; citrate (si)-synthase; lactate dehydrogenase; citric acid; anaerobiosis; roots; enzyme activity
Abstract:
... The effects of iron (Fe) deficiency on carboxylate metabolism were investigated in barley (Hordeum vulgare L.) using two cultivars, Steptoe and Morex, which differ in their Fe efficiency response. In both cultivars, root extracts of plants grown in Fe-deficient conditions showed higher activities of enzymes related to organic acid metabolism, including citrate synthase, malate dehydrogenase and ph ...
DOI:
10.1016/j.jplph.2012.04.010
PubMed:
22709961

28. Carboxylate metabolism in sugar beet plants grown with excess Zn

Author:
R. Sagardoy; F. Morales; R. Rellán-Álvarez; A. Abadía; J. Abadía; A.F. López-Millán
Source:
Journal of plant physiology 2011 v.168 no.7 pp. 730-733
ISSN:
0176-1617
Subject:
Beta vulgaris; citrate (si)-synthase; citrates; citric acid; enzyme activity; growth chambers; isocitrate dehydrogenase; leaf extracts; leaves; malates; malic acid; metabolism; nutrient solutions; phosphoenolpyruvate carboxylase; roots; sap; sugar beet; xylem
Abstract:
... The effects of Zn excess on carboxylate metabolism were investigated in sugar beet (Beta vulgaris L.) plants grown hydroponically in a growth chamber. Root extracts of plants grown with 50 or 100μM Zn in the nutrient solution showed increases in several enzymatic activities related to organic acid metabolism, including citrate synthase and phosphoenolpyruvate carboxylase, when compared to activiti ...
DOI:
10.1016/j.jplph.2010.10.012
PubMed:
21194788

29. Cellular responses of two Latin-American cultivars of Lotus corniculatus to low pH and Al stress

Author:
Peter Paľove-Balang; Milada Čiamporová; Veronika Zelinová; Ján Pavlovkin; Erika Gurinová; Igor Mistrík
Source:
Open life sciences 2012 v.7 no.6 pp. 1046-1054
ISSN:
2391-5412
Subject:
Lotus corniculatus; aluminum; cell walls; citrates; cultivars; cytoplasm; death; exudation; forage; membrane potential; pH; roots; tannins; toxicity
Abstract:
... Toxic effects of acidic root medium and aluminium were evaluated in two forage cultivars of Lotus corniculatus differing in their tolerance to Al stress. The structural response of most of the root cells exposed to low pH without Al3+ differed markedly from that induced by the combined stress. Conspicuous alteration of the nucleus was present only at low pH 4.0 and disintegration of the cytoplasmi ...
DOI:
10.2478/s11535-012-0098-0

30. Changes in water status and osmolyte contents in leaves and roots of olive plants (Olea europaea L.) subjected to water deficit

Author:
Dichio, Bartolomeo; Margiotta, Giovanna; Xiloyannis, Cristos; Bufo, Sabino A.; Sofo, Adriano; Cataldi, Tommaso R. I.
Source:
Trees 2009 v.23 no.2 pp. 247-256
ISSN:
0931-1890
Subject:
Olea europaea; calcium; cations; citrates; glucose; leaf water potential; leaves; malates; mannitol; olives; osmotic pressure; physiological response; roots; stachyose; sucrose; trees; turgor; water content; water stress
Abstract:
... Two-year-old olive trees (Olea europaea L., cv. Coratina) were subjected to a 15-day period of water deficit, followed by 12 days of rewatering. Water deficit caused decreases in predawn leaf water potential (Ψw), relative water content and osmotic potential at full turgor (Ψ π₁₀₀) of leaves and roots, which were normally restored upon the subsequent rewatering. Extracts of leaves and roots of wel ...
DOI:
10.1007/s00468-008-0272-1

31. Changes induced by aluminum stress in the organic acid content of maize seedlings: The crucial role of exogenous citrate in enhancing seedling growth

Author:
Radhouane Chaffai; Tinni Nouhou Seybou; Brahim Marzouk; Ezzedine Ferjani
Source:
Biologia 2009 v.64 no.6 pp. 1129-1135
ISSN:
1336-9563
Subject:
Zea mays; aluminum; citrates; corn; malates; nutrient solutions; root growth; roots; seedling growth; seedlings; shoots; succinic acid; toxicity
Abstract:
... We have studied the effect of Al on growth and morphology of maize seedlings (Zea mays L.), the changes in organic acid content as well as the role of application of exogenous citrate in enhancing the Al tolerance. Al treatment induced inhibition of root growth, causing morphological symptoms of Al toxicity. Al decreased significantly the malate content in roots compared to control plants. However ...
DOI:
10.2478/s11756-009-0179-3

32. Characterization of CcSTOP1; a C2H2-type transcription factor regulates Al tolerance gene in pigeonpea

Author:
Abhijit Arun Daspute; Yuriko Kobayashi; Sanjib Kumar Panda; Bashasab Fakrudin; Yasufumi Kobayashi; Mutsutomo Tokizawa; Satoshi Iuchi; Arbind Kumar Choudhary; Yoshiharu Y. Yamamoto; Hiroyuki Koyama
Source:
Planta 2018 v.247 no.1 pp. 201-214
ISSN:
0032-0935
Subject:
Cajanus cajan; acid soils; aluminum; binding capacity; binding sites; breeding; citrates; excretion; gain-of-function mutation; genes; loss-of-function mutation; pigeon peas; roots; tobacco; toxic substances; transcription (genetics); transcription factors; transgenic plants
Abstract:
... MAIN CONCLUSION: Al-responsive citrate-transporting CcMATE1 function and its regulation by CcSTOP1 were analyzed using NtSTOP1 -KD tobacco- and pigeonpea hairy roots, respectively, CcSTOP1 binding sequence of CcMATE1 showed similarity with AtALMT1 promoter. The molecular mechanisms of Aluminum (Al) tolerance in pigeonpea (Cajanus cajan) were characterized to provide information for molecular breed ...
DOI:
10.1007/s00425-017-2777-6

33. Chemical forms of iron in xylem sap from graminaceous and non-graminaceous plants

Author:
Tomoko Ariga; Kenji Hazama; Shuichi Yanagisawa; Tadakatsu Yoneyama
Source:
Soil science and plant nutrition 2014 v.60 no.4 pp. 460-469
ISSN:
1747-0765
Subject:
Glycine max; Oryza sativa; Ricinus communis; Solanum lycopersicum var. lycopersicum; Zea mays; barley; castor beans; cell membranes; citrates; corn; ferric compounds; gel chromatography; ions; iron; nicotianamine; phytosiderophores; rice; roots; sap; soil; soybeans; stems; tomatoes; xylem
Abstract:
... Graminaceous plants can take up iron-phytosiderophore complexes, whereas non-graminaceous plants absorb ferrous ions after the reduction of ferric compounds at the root cell membranes. The iron (Fe) in the roots may be transported to the aerial plant parts through the xylem. We compared the chemical forms in xylem sap collected from the cut stems of three graminaceous plants (rice [ Oryza sativa L ...
DOI:
10.1080/00380768.2014.922406

34. Citrate adsorption can decrease soluble phosphate concentration in soil: Experimental and modeling evidence

Author:
Marek Duputel; Florence Van Hoye; Joële Toucet; Frédéric Gérard
Source:
Applied geochemistry 2013 v.39 pp. 85-92
ISSN:
0883-2927
Subject:
Cambisols; adsorption; adverse effects; calcium; citrates; desorption; environmental factors; exchangeable calcium; illite; models; phosphorus; prediction; rhizosphere; roots; soil minerals; soil organic carbon; soil properties
Abstract:
... The adsorption/desorption of phosphate (PO4) on soil minerals is a major process regulating soluble phosphate concentrations (i.e. phosphorus availability) and ultimately PO4 bio-availability. Release of citrate by roots is widely recognized as an effective biological mechanism for increasing available phosphorus (P) in soil. However, interactions between citrate and PO4 are poorly understood and ...
DOI:
10.1016/j.apgeochem.2013.09.017

35. Citrate adsorption can decrease soluble phosphate concentration in soils: Results of theoretical modeling

Author:
Marek Duputel; Nicolas Devau; Michel Brossard; Benoît Jaillard; Davey L. Jones; Philippe Hinsinger; Frédéric Gérard
Source:
Applied geochemistry 2013 v.35 pp. 120-131
ISSN:
0883-2927
Subject:
Cambisols; Ferralsols; adsorption; adverse effects; binding sites; calcium; citrates; clay minerals; dissolved organic carbon; electrostatic interactions; environmental factors; exchangeable calcium; models; nutrition; rhizosphere; roots; soil organic carbon; soil pH
Abstract:
... A major problem for 21st century agriculture is the prospect of P scarcity. Adsorption of PO4 on the soil’s solid phase is the primary mechanism regulating P availability. Release of citrate by roots is generally thought to increase the availability of P, which in turn improves P acquisition by plants. However, the interaction between citrate and PO4 remains poorly understood in soils and conflict ...
DOI:
10.1016/j.apgeochem.2013.03.018

36. Citrate exudation from white lupin induced by phosphorus deficiency differs from that induced by aluminum

Author:
B. L. Wang; J. B. Shen; W. H. Zhang; F. S. Zhang; G. Neumann
Source:
new phytologist 2007 v.176 no.3 pp. 581-589
ISSN:
0028-646X
Subject:
Lupinus albus; aluminum; citrates; exudation; lanthanum; nutritional status; phosphorus; rhizosphere; root growth; root systems; roots; seedlings; toxicity
Abstract:
... • Both phosphorus (P) deficiency and aluminum (Al) toxicity induce root exudation of carboxylates, but the relationship between these two effects is not fully understood. Here, carboxylate exudation induced by Al in Lupinus albus (white lupin) was characterized and compared with that induced by P deficiency. • Aluminum treatments were applied to whole root systems or selected root zones of plants ...
DOI:
10.1111/j.1469-8137.2007.02206.x
PubMed:
17725555

37. Citrate exudation induced by aluminum is independent of plasma membrane H⁺-ATPase activity and coupled with potassium efflux from cluster roots of phosphorus-deficient white lupin

Author:
Houqing Zeng; Xumeng Feng; Baolan Wang; Yiyong Zhu; Qirong Shen; Guohua Xu
Source:
Plant and soil 2013 v.366 no.1-2 pp. 389-400
ISSN:
0032-079X
Subject:
aluminum; anions; chlorides; citrates; exudation; fusicoccin; plasma membrane; potassium; roots
Abstract:
... AIMS: Exudation of organic acid anions is one of the mechanisms responsible for aluminum (Al) tolerance. The plasma membrane (PM) H⁺-ATPase is involved in the exudation of organic acid anions. However, the relationship between organic acid exudation and PM H⁺-ATPase under Al toxicity remains unclear. This study aims to investigate the correlation among Al-induced citrate exudation, PM H⁺-ATPase ac ...
DOI:
10.1007/s11104-012-1445-7

38. Citrate secretion induced by aluminum stress may not be a key mechanism responsible for differential aluminum tolernace of some soybean genotypes

Author:
Nian, H.; Yang, Z.; Huang, H.; Yan, X.; Matsumoto, H.
Source:
Journal of plant nutrition 2004 v.27 no.11 pp. 2047-2066
ISSN:
0190-4167
Subject:
aluminum; cadmium; citrates; copper; exudation; genotype; malates; root growth; roots; secretion; soybeans; Brazil
Abstract:
... Eighteen soybean genotypes differing in aluminum (Al) tolerance were used to investigate genotypic differences in Al-induced citrate exudation and its role in Al tolerance. Aluminum accumulation and localization in soybean roots were examined by analysis of total Al and hematoxylin staining. Soybean genotypes exhibited a wide range of Al tolerance. Based on relative root elongation, several Al-tol ...
DOI:
10.1081/PLN-200030112

39. Citrate transporters play an important role in regulating aluminum-induced citrate secretion in Glycine max

Author:
You, J. F.; Hou, N. N.; Xu, M. Y.; Zhang, H. M.; Yang, Z. M.
Source:
Biologia plantarum 2010 v.54 no.4 pp. 766-768
ISSN:
0006-3134
Subject:
Glycine max; aluminum; citrates; cultivars; cycloheximide; exudation; mitochondrial membrane; plasma membrane; protein synthesis; protein synthesis inhibitors; pyridoxal; roots; secretion; soybeans; transporters
Abstract:
... To further understand the process of Al-induced citrate secretion from soybean roots, the effect of protein synthesis inhibitor, anion channel blockers, and citrate carrier inhibitors on Al-induced citrate exudation was investigated in Al-resistant soybean cultivar PI 416937. Citrate exudation from roots increased with the increase of Al concentration from 10 to 50 μM and initiated after 4 h of Al ...
DOI:
10.1007/s10535-010-0138-4

40. Citrate-release-mediated aluminum resistance is coupled to the inducible expression of mitochondrial citrate synthase gene in Paraserianthes falcataria

Author:
Osawa, H.; Kojima, K.
Source:
Tree physiology 2006 v.26 no.5 pp. 565-574
ISSN:
0829-318X
Subject:
Falcataria moluccana; Acacia mangium; Leucaena leucocephala; forest trees; roots; aluminum; phytotoxicity; stress tolerance; citrates; metabolism; mitochondria; citrate (si)-synthase; enzyme activity; genetic resistance; gene expression; Australia; Guatemala; Indonesia
Abstract:
... Aluminum (Al) resistance in some leguminous plants is achieved by enhanced citrate release from roots. Enhancement requires several hours for complete activation and is postulated to involve Al-responsive genes or components. We examined the mechanism of Al-induced citrate release by studying the relationship between citrate release and expression of the mitochondrial citrate synthase (mCS) gene i ...
DOI:
10.1093/treephys/26.5.565
PubMed:
16452070

41. Cluster root formation and function vary in two species with contrasting geographic ranges

Author:
Andrea Ávila-Valdés; Frida I. Piper; Alejandra Zúñiga-Feest
Source:
Plant and soil 2019 v.440 no.1-2 pp. 25-38
ISSN:
0032-079X
Subject:
Embothrium coccineum; biomass; citrates; enzyme activity; exudation; geographical distribution; malates; mined soils; nutrient availability; nutrition; phosphorus; roots; seedlings; soil nutrients; total phosphorus; volcanic soils
Abstract:
... AIMS: Southern South American Proteaceae can occupy soils that are rich in total phosphorus (P) but poor in available P (for example volcanic soils) thanks to their cluster roots (CR), which mine soil P. However, some southern South American Proteaceae occur in a wide range of soil nutrition. We hypothesized that CR formation and function are more responsive to nutrient soil availability in the wi ...
DOI:
10.1007/s11104-019-04056-3

42. Combined effect of organic acids and flavonoids on the mobilization of major and trace elements from soil

Author:
Roberto Terzano; Giovanni Cuccovillo; Concetta Eliana Gattullo; Luca Medici; Nicola Tomasi; Roberto Pinton; Tanja Mimmo; Stefano Cesco
Source:
Biology and fertility of soils 2015 v.51 no.6 pp. 685-695
ISSN:
0178-2762
Subject:
acid soils; agricultural soils; alkaline soils; biodegradation; calcareous soils; citrates; copper; iron; manganese; nickel; particles; quercetin; roots; rutin; silicon; sorption; synergism; zinc
Abstract:
... Combinations of different molecules usually co-exuded by plant roots in soil can significantly affect the mobilization of mineral elements from soil. The flavonoids rutin and quercetin appeared to be highly efficient in Fe and Mn mobilization from soil, being rutin about 25 times more effective than citrate in extracting Fe from an alkaline calcareous soil, and 15 times in mobilizing Mn from a sli ...
DOI:
10.1007/s00374-015-1009-0

43. Combined effect of short-term water deficit stress and aluminum toxicity on citrate secretion from soybean roots

Author:
Nian, H.; Yang, Z.M.; Huang, H.; Xan, X.L.; Matsumoto, H.
Source:
Journal of plant nutrition 2004 v.27 no.7 pp. 1281-1293
ISSN:
0190-4167
Subject:
abscisic acid; aluminum; calcium; calcium chloride; citrates; exudation; genotype; hydroponics; photosynthesis; root growth; root systems; roots; secretion; shoots; soil; soybeans; toxicity; water stress
Abstract:
... In order to investigate the combined effect of drought stress and aluminum (Al) toxicity on citrate exudation in soybean, hydroponic cultivation with addition of Al and PEG-6000 was conducted to simulate Al-toxic dry soil. Results showed that 2-day exposure of soybeans to 5.5% (w/v) PEG-6000 or 100 micromolar AlCl3 mainly hindered root growth, while combined exposure to PEG and Al (PEG/Al) reduced ...
DOI:
10.1081/PLN-120038548

44. Comparison of iron chelates and complexes supplied as foliar sprays and in nutrient solution to correct iron chlorosis of soybean

Author:
Rodríguez-Lucena, Patricia; Hernández-Apaolaza, Lourdes; Lucena, Juan J.
Source:
Zeitschrift für Pflanzenernährung und Bodenkunde 2010 v.173 no.1 pp. 120-126
ISSN:
1436-8730
Subject:
Glycine max; amino acids; chelates; chlorosis; citrates; fertilizers; foliar spraying; glycoproteins; humates; hydroponics; iron; lignosulfonates; nutrient solutions; plant growth; plant response; polyamines; roots; shoots; soybeans; transferrin
Abstract:
... The application of synthetic chelates is the most efficient remedy for correcting iron (Fe) chlorosis. However, chelates are usually expensive and nondegradable products. Recently, new degradable chelates have been proposed for their use as Fe fertilizers. Also, Fe complexes cheaper than synthetic chelates and derived from natural products are also used to correct Fe deficiencies. Fifteen products ...
DOI:
10.1002/jpln.200800256

45. Comparison of the response to phosphorus deficiency in two lupin species, Lupinus albus and L. angustifolius, with contrasting root morphology

Author:
SACHIKO FUNAYAMA‐NOGUCHI; KO NOGUCHI; ICHIRO TERASHIMA
Source:
Plant, cell and environment 2015 v.38 no.3 pp. 399-410
ISSN:
0140-7791
Subject:
Lupinus albus; adenosine triphosphate; citrates; dry matter partitioning; hydroponics; leaves; malates; phosphorus; roots; soil
Abstract:
... White lupin (Lupinus albus) produces cluster roots, an adaptation to low soil phosphorus (P). Cluster roots exude large levels of P‐solubilizing compounds such as citrate and malate. In contrast, narrow leaf lupin (L. angustifolius) is closely related to L. albus, but does not produce cluster roots. To examine the different strategies for P acquisition, we compared the growth, biomass allocation, ...
DOI:
10.1111/pce.12390

46. Contrasting effect of silicon on iron, zinc and manganese status and accumulation of metal-mobilizing compounds in micronutrient-deficient cucumber

Author:
Nikolai Bityutskii; Jelena Pavlovic; Kirill Yakkonen; Vuk Maksimović; Miroslav Nikolic
Source:
Plant physiology and biochemistry 2014 v.74 pp. 205-211
ISSN:
0981-9428
Subject:
Cucumis sativus; abiotic stress; citrates; cucumbers; hydroponics; iron; leaves; manganese; nutrient deficiencies; nutrient solutions; phenolic acids; plant tissues; roots; silicon; tissue distribution; zinc
Abstract:
... Although the beneficial role of silicon (Si) in alleviation of abiotic stress is well established, little is known of the relevance of Si nutrition under microelement deficiency. The aim of our work was to investigate the physiological role of Si in relation to micronutrient (Fe, Zn and Mn) deficiencies in cucumber (Cucumis sativus L.). Cucumber (cv. Semkross) plants were grown hydroponically in a ...
DOI:
10.1016/j.plaphy.2013.11.015

47. Contrasting reactions of roots of two coniferous tree species to aluminum stress

Author:
Yasuhiro Hirano; Beat Frey; Ivano Brunner
Source:
Environmental and experimental botany 2012 v.77 no. pp. 12-18
ISSN:
0098-8472
Subject:
Cryptomeria japonica; Pinus thunbergii; acid soils; aluminum; callose; cell walls; citrates; conifers; digitonin; exudation; forest trees; plantations; roots; seedlings
Abstract:
... The formation of cell-wall polysaccharide callose in tree roots has been suggested to detect aluminum (Al) stress at an early stage in forest trees. The objective of this study was to clarify whether the Japanese plantation tree species Cryptomeria japonica, which grows in acid soils, and Pinus thunbergii, distributed in coastal regions, have sensitive or tolerant root reactions against Al stress. ...
DOI:
10.1016/j.envexpbot.2011.10.007

48. Degradation of citrate promotes copper co-precipitation within aluminium-(hydr)oxides in calcareous soils

Author:
Roberto Terzano; Giovanni Cuccovillo; Silvia Pascazio; Carmine Crecchio; Antonio Lettino; Saverio Fiore; Nicola Tomasi; Roberto Pinton; Tanja Mimmo; Stefano Cesco
Source:
Biology and fertility of soils 2017 v.53 no.1 pp. 115-128
ISSN:
0178-2762
Subject:
Bradyrhizobium; Pseudomonas; Sphingomonas; aluminum; bacteria; biodegradation; calcareous soils; citrates; copper; coprecipitation; environmental factors; microbial activity; nutrient availability; oxides; pH; ribosomal DNA; roots; solubility; toxicity
Abstract:
... In this study, we provide experimental evidences that in calcareous soils microbial degradation/decomposition of citrate can promote Al-(hydr)oxide precipitation concurrently decreasing copper (Cu) solubility by a coprecipitation process. Citrate is an organic acid anion commonly released by roots to increase nutrient availability or to limit Al toxicity. However, under specific environmental cond ...
DOI:
10.1007/s00374-016-1164-y

49. Design Defines the Effects of Nanoceria at a Low Dose on Soil Microbiota and the Potentiation of Impacts by the Canola Plant

Author:
Hamidat Mohamed; Barakat Mohamed; Ortet Philippe; Chanéac Corinne; Rose Jérome; Bottero Jean-Yves; Heulin Thierry; Achouak Wafa; Santaella Catherine
Source:
Environmental Science & Technology 2016 v.50 no.13 pp. 6892-6901
ISSN:
1520-5851
Subject:
bacteria; bacterial communities; canola; citrates; coatings; community structure; environmental impact; enzyme activity; genes; microbial activity; nanomaterials; particle size; plant pathogens; rhizosphere; ribosomal RNA; roots; soil; soil biota; surface water
Abstract:
... Soils act as nanoceria sinks via agricultural spreading and surface waters. Canola plants were grown for one month in soil spiked with nanoceria (1 mg·kg–¹). To define the role of nanomaterials design on environmental impacts, we studied nanoceria with different sizes (3.5 or 31 nm) and coating (citrate). We measured microbial activities involved in C, N, and P cycling in the rhizosphere and unpla ...
DOI:
10.1021/acs.est.6b01056

50. Differential Aluminum Resistance and Organic Acid Anions Secretion in Triticale

Author:
Liu, Q.; He, L.S.; Wang, Z.Y.; Cheng, X.Z.; Zheng, S.J.
Source:
Communications in soil science and plant analysis 2007 v.38 no.15-16 pp. 1991-2004
ISSN:
0010-3624
Subject:
cultivars; citrates; ion channels; correlation; genetic resistance; phytotoxicity; anions; aluminum; root growth; triticale; genetic variation; temperature; metal tolerance; roots
Abstract:
... Triticale (X Triticosecale Wittmack), a hybrid of wheat and rye, shows a high degree of aluminum (Al) tolerance, but variation in Al resistance between cultivars does exist. The mechanisms responsible for differential Al resistance in 10 triticale cultivars were investigated in this study. Triticale roots secreted both malate and citrate in response to Al stress. The amount of organic acid anions ...
DOI:
10.1080/00103620701548589