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You searched for: Publication Year 2010 Remove constraint Publication Year: 2010 Subject aluminum Remove constraint Subject: aluminum Subject term citrates Remove constraint Subject term: citrates
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1. Alteration of cell-wall porosity is involved in osmotic stress-induced enhancement of aluminium resistance in common bean (Phaseolus vulgaris L.)

Author:
Yang, Zhong-Bao; Eticha, Dejene; Rao, Idupulapati Madhusudana; Horst, Walter Johannes
Source:
Journal of experimental botany 2010 v.61 no.12 pp. 3245-3258
ISSN:
0022-0957
Subject:
Phaseolus vulgaris; aluminum; apoplast; beans; binding capacity; cations; citrates; crop production; dialysis; drought; exudation; genotype; hydroponics; polyethylene glycol; porosity; root growth; root tips; toxicity; tropics; water stress
Abstract:
... Aluminium (Al) toxicity and drought are the two major abiotic stress factors limiting common bean production in the tropics. Using hydroponics, the short-term effects of combined Al toxicity and drought stress on root growth and Al uptake into the root apex were investigated. In the presence of Al stress, PEG 6000 (polyethylene glycol)-induced osmotic (drought) stress led to the amelioration of Al ...
DOI:
10.1093/jxb/erq146
PubMed:
20511277
PubMed Central:
PMC2905193

2. Aluminum resistance in common bean (Phaseolus vulgaris) involves induction and maintenance of citrate exudation from root apices

Author:
Rangel, Andrés Felipe; Rao, Idupulapati Madhusudana; Braun, Hans-Peter; Horst, Walter Johannes
Source:
Physiologia plantarum 2010 v.138 no.2 pp. 176-190
ISSN:
0031-9317
Subject:
6-phosphofructokinase; NAD (coenzyme); Phaseolus vulgaris; aluminum; beans; citrate (si)-synthase; citrates; exudation; isocitrate dehydrogenase (NADP); malate dehydrogenase; phosphoenolpyruvate carboxylase; root growth; root tips
Abstract:
... Two common bean (Phaseolus vulgaris L.) genotypes differing in aluminum (Al) resistance, Quimbaya (Al-resistant) and VAX-1 (Al-sensitive) were grown in hydroponics for up to 25 h with or without Al, and several parameters related to the exudation of organic acids anions from the root apex were investigated. Al treatment enhanced the exudation of citrate from the root tips of both genotypes. Howeve ...
DOI:
10.1111/j.1399-3054.2009.01303.x
PubMed:
20053183

3. 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

4. Highly selective light scattering imaging of chromium (III) in living cells with silver nanoparticles

Author:
Tong Wu; Chun Liu; Ke Jun Tan; Ping Ping Hu; Cheng Zhi Huang
Source:
Analytical and bioanalytical chemistry 2010 v.397 no.3 pp. 1273-1279
ISSN:
1618-2642
Subject:
aluminum; ambient temperature; bone marrow; calcium; chelation; chromium; citrates; cobalt; color; copper; crosslinking; cytoplasm; humans; image analysis; iron; lanthanum; lead; light scattering; magnesium; mercury; metal ions; nanosilver; nickel; pH; surface plasmon resonance; zinc
Abstract:
... In this contribution, we present a highly selective chromium ion (Cr³⁺)-induced aggregation of citrate-capped silver nanoparticles, which could be applied for the imaging of the distribution of Cr³⁺ in cells. It was found that selective aggregation of citrate-capped silver nanoparticles occurs at room temperature in the presence of Cr³⁺ in aqueous medium of pH 6.8, resulting in color change from y ...
DOI:
10.1007/s00216-010-3619-6

5. How a microbial drug transporter became essential for crop cultivation on acid soils: aluminium tolerance conferred by the multidrug and toxic compound extrusion (MATE) family

Author:
Magalhaes, Jurandir V.
Source:
Annals of botany 2010 v.106 no.1 pp. 199-203
ISSN:
0305-7364
Subject:
aluminum; arable soils; barley; citrates; crops; drugs; extrusion; functional diversity; genes; loci; protein transport; substrate specificity; tillage; toxicity; transporters
Abstract:
... BACKGROUND: Aluminium (Al) toxicity is a major agricultural constraint for crop cultivation on acid soils, which comprise a large portion of the world's arable land. One of the most widely accepted mechanisms of Al tolerance in plants is based on Al-activated organic acid release into the rhizosphere, with organic acids forming stable, non-toxic complexes with Al. This mechanism has recently been ...
DOI:
10.1093/aob/mcq115
PubMed:
20511585
PubMed Central:
PMC2889808

6. Isolation and characterisation of two MATE genes in rye

Author:
Yokosho, Kengo; Yamaji, Naoki; Ma, Jian Feng
Source:
Functional plant biology 2010 v.37 no.4 pp. 296-303
ISSN:
1445-4408
Subject:
Secale cereale; rye; Hordeum vulgare; barley; Oryza sativa; rice; roots; shoots; nutrient transport; gene expression regulation; aluminum; nutrient use efficiency; iron; nutrient deficiencies; genes; citrates; translocation (plant physiology)
Abstract:
... Multidrug and toxic compound extrusion (MATE) proteins are widely present in bacteria, fungi, plants and mammals. Recent studies have showed that a group of plant MATE genes encodes citrate transporter, which are involved in the detoxification of aluminium or translocation of iron from the roots to the shoots. In this study, we isolated two homologous genes (ScFRDL1 and ScFRDL2) from this family i ...
DOI:
10.1071/FP09265

7. Mitochondrial enzymes and citrate transporter contribute to the aluminium-induced citrate secretion from soybean (Glycine max) roots

Author:
Xu, Muyun; You, Jiangfeng; Hou, Ningning; Zhang, Hongmei; Chen, Guang; Yang, Zhenming
Source:
Functional plant biology 2010 v.37 no.4 pp. 285-295
ISSN:
1445-4408
Subject:
Glycine max; soybeans; roots; aluminum; phytotoxicity; disease resistance; citrates; metabolism; transport proteins; mitochondria; malate dehydrogenase; citrate (si)-synthase; aconitate hydratase; enzyme activity; dose response; protein secretion; gene expression regulation; transcription (genetics); plant growth; acid soils
Abstract:
... The concentration of soluble aluminium (Al) in the soil solution increases at low pH and the prevalence of toxic Al³⁺ cations represent the main factor limiting plant growth on acid soils. Citrate secretion from roots is an important Al-tolerance mechanism in many species including soybean. We isolated mitochondria from the roots of an Al-resistant soybean (Glycine max L.) cv. Jiyu 70 to investiga ...
DOI:
10.1071/FP09223

8. Plant Growth Promotion by an Extracellular HAP-Phytase of a Thermophilic Mold Sporotrichum thermophile

Author:
Singh, Bijender; Satyanarayana, T.
Source:
Applied biochemistry and biotechnology 2010 v.160 no.5 pp. 1267-1276
ISSN:
0273-2289
Subject:
plant growth substances; Myceliophthora thermophila; molds (fungi); phytases; phosphates; phytic acid; calcium; magnesium; cobalt; aluminum; iron; zinc; enzymatic hydrolysis; temperature; citrates; wheat; fungal spores; plant growth; composts; wheat straw; soil fungi
Abstract:
... Phytase of the thermophilic mold Sporotrichum thermophile Apinis hydrolyzed and liberated inorganic phosphate from Ca⁺², Mg⁺², and Co⁺² phytates more efficiently than those of Al³⁺, Fe²⁺, Fe³⁺, and Zn²⁺. The hydrolysis rate was higher at 60 °C as compared to 26 °C. Among all the organic acids tested, citrate was more effective in enhancing solubilization of insoluble phytate salts by phytase than ...
DOI:
10.1007/s12010-009-8593-0
PubMed:
19333564

9. Pseudomonas fluorescens orchestrates a fine metabolic-balancing act to counter aluminium toxicity

Author:
Lemire, Joseph; Mailloux, Ryan; Auger, Christopher; Whalen, Daniel; Appanna, Vasu D.
Source:
Environmental microbiology 2010 v.12 no.6 pp. 1384-1390
ISSN:
1462-2912
Subject:
NAD (coenzyme); citrates; Pseudomonas fluorescens; iron; application technology; oxidative phosphorylation; adenosine triphosphate; aerobiosis; metabolites; carbon; microorganisms; aluminum; homeostasis; toxins; toxicity; aconitate hydratase; tricarboxylic acids; isocitrate lyase
Abstract:
... Aluminium (Al), an environmental toxin, is known to disrupt cellular functions by perturbing iron (Fe) homeostasis. However, Fe is essential for such metabolic processes as the tricarboxylic acid (TCA) cycle and oxidative phosphorylation, the two pivotal networks that mediate ATP production during aerobiosis. To counter the Fe conundrum induced by Al toxicity, Pseudomonas fluorescens utilizes isoc ...
DOI:
10.1111/j.1462-2920.2010.02200.x
PubMed:
20353438

10. Spatial characteristics of aluminum uptake and translocation in roots of buckwheat (Fagopyrum esculentum)

Author:
Klug, Benjamin; Horst, Walter J.
Source:
Physiologia plantarum 2010 v.139 no.2 pp. 181-191
ISSN:
0031-9317
Subject:
Fagopyrum esculentum; aluminum; buckwheat; citrates; correlation; resistance mechanisms; rhizosphere; root tips; signal transduction; xylem
Abstract:
... The detoxification of aluminum (Al) in root tips of the Al accumulator buckwheat by exudation of oxalate leading to reduced Al uptake (Al resistance) is difficult to reconcile with the Al accumulation (Al tolerance). The objective of this study was to analyze resistance and tolerance mechanisms at the same time evaluating particularly possible stratification of Al uptake, Al transport and oxalate ...
DOI:
10.1111/j.1399-3054.2010.01355.x
PubMed:
20088907

11. Transcriptomic analysis reveals differential gene expression in response to aluminium in common bean (Phaseolus vulgaris) genotypes

Author:
Eticha, Dejene; Zahn, Marc; Bremer, Melanie; Yang, Zhongbao; Rangel, Andrés F.; Rao, Idupulapati M.; Horst, Walter J.
Source:
Annals of botany 2010 v.105 no.7 pp. 1119-1128
ISSN:
0305-7364
Subject:
Phaseolus vulgaris; aluminum; beans; citrates; enzymes; extrusion; exudation; gene expression; gene induction; genes; genotype; hybridization; polymerase chain reaction; protein synthesis; roots; transporters
Abstract:
... BACKGROUND AND AIMS: Aluminium (Al) resistance in common bean is known to be due to exudation of citrate from the root after a lag phase, indicating the induction of gene transcription and protein synthesis. The aims of this study were to identify Al-induced differentially expressed genes and to analyse the expression of candidate genes conferring Al resistance in bean. METHODS: The suppression su ...
DOI:
10.1093/aob/mcq049
PubMed:
20237115
PubMed Central:
PMC2887069

12. Transgenic tobacco plants overexpressing pyruvate phosphate dikinase increase exudation of organic acids and decrease accumulation of aluminum in the roots

Author:
Trejo-Téllez, L. I.; Stenzel, R.; Gómez-Merino, F. C.; Schmitt, J. M.
Source:
Plant and soil 2010 v.326 no.1-2 pp. 187-198
ISSN:
0032-079X
Subject:
Mesembryanthemum crystallinum; acid soils; adenosine monophosphate; adenosine triphosphate; aluminum; atomic absorption spectrometry; catalytic activity; citrates; drought; enzymes; exudation; gene overexpression; phosphates; phosphorylation; pyruvic acid; root growth; root tips; salt stress; seedlings; tobacco; toxicity; tricarboxylic acid cycle
Abstract:
... Pyruvate phosphate dikinase (PPDK) catalyses the phosphorylation of pyruvate (+ ATP + Pi) yielding phosphoenolpyruvate (+ AMP + PPi). PPDK levels are induced upon drought and salt stress and both cytosolic and plastidic isoforms are found in higher plants. Herein we investigate the role of this enzyme upon aluminum exposure. We generated transgenic tobacco plants expressing either a plastidic (PPD ...
DOI:
10.1007/s11104-009-9994-0

13. Two functionally distinct members of the MATE (multi-drug and toxic compound extrusion) family of transporters potentially underlie two major aluminum tolerance QTLs in maize

Author:
Maron, Lyza G.; Piñeros, Miguel A.; Guimarães, Claudia T.; Magalhaes, Jurandir V.; Pleiman, Jennifer K.; Mao, Chuanzao; Shaff, Jon; Belicuas, Silvia N.J.; Kochian, Leon V.
Source:
Plant journal 2010 v.61 no.5 pp. 728-740
ISSN:
0960-7412
Subject:
Arabidopsis; Xenopus; acid soils; aluminum; arable soils; barley; carbon; chromosomes; citrates; corn; crop yield; extrusion; exudation; gene expression regulation; genes; genotype; ligands; oocytes; plasma membrane; quantitative trait loci; radionuclides; roots; tissues; toxic substances; toxicity; transgenic plants; transporters
Abstract:
... Crop yields are significantly reduced by aluminum (Al) toxicity on acidic soils, which comprise up to 50% of the world's arable land. Al-activated release of ligands (such as organic acids) from the roots is a major Al tolerance mechanism in plants. In maize, Al-activated root citrate exudation plays an important role in tolerance. However, maize Al tolerance is a complex trait involving multiple ...
DOI:
10.1111/j.1365-313X.2009.04103.x
PubMed:
20003133