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1. A bradyrhizobial-Penicillium spp. biofilm with nitrogenase activity improves N2 fixing symbiosis of soybean

Author:
Jayasinghearachchi, H.S.; Seneviratne, G.
Source:
Biology and fertility of soils 2004 v.40 no.6 pp. 432-434
ISSN:
0178-2762
Subject:
nitrogen fixation,   etc   ; Bradyrhizobium elkanii; Penicillium; inoculum; biofilm; nitrogenase; enzyme activity; symbiosis; soybeans; Glycine max; roots; shoots; plant growth; nodulation; nitrogen content; in vitro culture; greenhouse production;     Show all 17 Subjects
DOI:
10.1007/s00374-004-0796-5

2. Accumulation of γ-aminobutyric acid in nodulated soybean in response to drought stress

Author:
Serraj, R.; Shelp, B.J.; Sinclair, T.R.
Source:
Physiologia plantarum 1998 v.102 no.1 pp. 79
ISSN:
1399-3054
Subject:
nitrogen fixation,   etc   ; Glycine max; soybeans; roots; xylem; sap; chemical constituents of plants; amino acids; quantitative analysis; water stress; hypoxia; polyethylene glycol; drought tolerance; root nodules; symbiosis; nitrogen-fixing bacteria; gamma-aminobutyric acid; biosynthesis; glutamate decarboxylase; enzyme activity; oxygen; gas exchange;     Show all 22 Subjects
Abstract:
... Nitrogen fixation and nodule permeability to O2 diffusion are decreased by drought stress. Since γaminobutyric acid (GABA) synthesis is rapidly stimulated by a variety of stress conditions including hypoxia, it was hypothesized that decreased O2 availability in nodules stimulates glutamate decarboxylase (GAD) activity (EC 4.1.1.15), thereby resulting in GABA accumulation. First, the amino acid com ...
Handle:
10113/3988
DOI:
10.1034/j.1399-3054.1998.1020111.x

3. A functional relationship between leghaemoglobin and nitrogenase based on novel measurements of the two proteins in legume root nodules

Author:
Dakora, F.D.
Source:
Annals of botany 1995 v.75 no.1 pp. 49-54
ISSN:
0305-7364
Subject:
nitrogen fixation,   etc   ; Vigna unguiculata; Glycine max; Bradyrhizobium; symbiosis; root nodules; protein composition; nitrogenase; enzyme activity; leghemoglobin;     Show all 10 Subjects
Abstract:
... A combination of physiological and structural measurements made on nodulated cowpea and soybean plants cultured with roots in different pO2 permitted the expression of data in various ways. Values of leghemoglobin concentration and nitrogenase activity from the two legumes were expressed conventionally either on a per plant or per gram nodule fresh weight basis, and where microscopy was done, on t ...
DOI:
10.1016/S0305-7364(05)80008-3
PubMed:
21247912
PubMed Central:
PMC3023663

4. Alleviation of Salt Stress in Common Bean (Phaseolus vulgaris) by Exogenous Abscisic Acid Supply

Author:
Khadri, M.; Tejera, N.A.; Lluch, C.
Source:
Journal of plant growth regulation 2006 v.25 no.2 pp. 110-119
ISSN:
0721-7595
Subject:
nitrogen fixation,   etc   ; Phaseolus vulgaris; beans; salt stress; sodium chloride; dose response; salinity; salt tolerance; abscisic acid; plant growth; developmental stages; symbiosis; nitrogenase; enzyme activity; root nodules; ammonia; metabolism; purines;     Show all 18 Subjects
Abstract:
... In this work the effect of abscisic acid (ABA) and 100 mM NaCl on common bean (Phaseolus vulgaris var. Coco) growth, nitrogenase activity, and nodule metabolism was studied. Experiments were carried out in a controlled environmental chamber and plants, at the vegetative growth stage (16 days old), were treated with ABA (1 μM and 10 μM) and 48 h later were exposed to saline treatment. Results revea ...
DOI:
10.1007/s00344-005-0004-3

5. Antioxidant gene-enzyme responses in Medicago truncatula genotypes with different degree of sensitivity to salinity

Author:
Mhadhbi, Haythem; Fotopoulos, Vasileios; Mylona, Photini V.; Jebara, Moez; Elarbi Aouani, Mohamed; Polidoros, Alexios N.
Source:
Physiologia plantarum 2011 v.141 no.3 pp. 201-214
ISSN:
0031-9317
Subject:
nitrogen fixation,   etc   ; Medicago truncatula; antioxidants; ascorbate peroxidase; catalase; enzyme activity; gene expression; gene induction; genes; genotype; leaves; lipid peroxidation; nitrogenase; peroxidase; proteins; roots; salinity; salt tolerance; sodium chloride; stress response; superoxide dismutase; symbiosis;     Show all 22 Subjects
Abstract:
... Antioxidant responses and nodule function of Medicago truncatula genotypes differing in salt tolerance were studied. Salinity effects on nodules were analysed on key nitrogen fixation proteins such as nitrogenase and leghaemoglobin as well as estimating lipid peroxidation levels, and were found more dramatic in the salt-sensitive genotype. Antioxidant enzyme assays for catalase (CAT, EC 1.11.1.6), ...
DOI:
10.1111/j.1399-3054.2010.01433.x
PubMed:
21114673

6. Antioxidative ability and membrane integrity in salt-induced responses of Casuarina glauca Sieber ex Spreng. in symbiosis with N2-fixing Frankia Thr or supplemented with mineral nitrogen

Author:
Scotti-Campos, Paula; Duro, Nuno; Costa, Mário da; Pais, Isabel P.; Rodrigues, Ana P.; Batista-Santos, Paula; Semedo, José N.; Leitão, A.Eduardo; Lidon, Fernando C.; Pawlowski, Katharina; Ramalho, José C.; Ribeiro-Barros, Ana I.
Source:
Journal of plant physiology 2016 v.196-197 pp. 60-69
ISSN:
0176-1617
Subject:
nitrogen fixation,   etc   ; Casuarina glauca; Frankia; acclimation; ascorbate peroxidase; catalase; cell membranes; environmental factors; enzyme activity; fatty acid composition; glutathione-disulfide reductase; linolenic acid; malondialdehyde; nitrogen; nitrogen-fixing bacteria; oxidative stress; photosynthesis; root nodules; salinity; salt concentration; salt stress; sodium chloride; superoxide dismutase; symbiosis; trees;     Show all 25 Subjects
Abstract:
... The actinorhizal tree Casuarina glauca tolerates extreme environmental conditions, such as high salinity. This species is also able to establish a root-nodule symbiosis with N2-fixing bacteria of the genus Frankia. Recent studies have shown that C. glauca tolerance to high salt concentrations is innate and linked to photosynthetic adjustments. In this study we have examined the impact of increasin ...
DOI:
10.1016/j.jplph.2016.03.012

7. A phosphoenol pyruvate phosphatase transcript is induced in the root nodule cortex of Phaseolus vulgaris under conditions of phosphorus deficiency

Author:
Bargaz, A.; Ghoulam, C.; Amenc, L.; Lazali, M.; Faghire, M.; Abadie, J.; Drevon, J.J.
Source:
Journal of experimental botany 2012 v.63 no.13 pp. 4723-4730
ISSN:
0022-0957
Subject:
nitrogen fixation,   etc   ; Phaseolus vulgaris; Rhizobium tropici; beans; cortex; enzyme activity; enzymes; fluorescence; gene expression regulation; genes; inbred lines; messenger RNA; phosphorus; pyruvic acid; symbiosis;     Show all 15 Subjects
Abstract:
... Although previous studies on N2-fixing legumes have demonstrated the contribution of acid phosphatases to their phosphorus (P) use efficiency under P-deficient growth conditions, localization of these enzymes in bean nodules has not been demonstrated. In this study, phosphoenol pyruvate phosphatase (PEPase) gene transcripts were localized within the nodule tissues of two recombinant inbred lines, ...
DOI:
10.1093/jxb/ers151
PubMed:
22771853
PubMed Central:
PMC3428000

8. Application of anti-transpirants temporarily alleviates the inhibition of symbiotic nitrogen fixation in drought-stressed pea plants

Author:
Aldasoro, Joseba; Larrainzar, Estíbaliz; Arrese-Igor, Cesar
Source:
Agricultural water management 2019 v.213 pp. 193-199
ISSN:
0378-3774
Subject:
nitrogen fixation,   etc   ; Pisum sativum; Rhizobium; amino acids; antitranspirants; bacteria; carbohydrates; drought; enzyme activity; enzyme inhibition; nitrogen; nitrogenase; peas; photosynthesis; plant response; stomatal movement; symbiosis; transpiration; vapors; water stress;     Show all 20 Subjects
Abstract:
... Stomatal closure is one of the first plant responses under a water deficit situation. This leads to a decline in transpiration but also in the plant photosynthetic activity. Legume plants grown under symbiosis with rhizobium bacteria present an inhibition of nitrogen fixation that has been shown to occur even before this of photosynthesis. One of the hypotheses to explain this rapid inhibition is ...
DOI:
10.1016/j.agwat.2018.10.014

9. A purple acid phosphatase plays a role in nodule formation and nitrogen fixation in Astragalus sinicus

Author:
Wang, Jianyun; Si, Zaiyong; Li, Fang; Xiong, Xiaobo; Lei, Lei; Xie, Fuli; Chen, Dasong; Li, Yixing; Li, Youguo
Source:
Plant molecular biology 2015 v.88 no.6 pp. 515-529
ISSN:
0167-4412
Subject:
nitrogen fixation,   etc   ; RNA interference; energy; acid phosphatase; Komagataella pastoris; gene overexpression; phenotype; symbiosis; adenosine diphosphate; root nodules; adenosine triphosphate; high performance liquid chromatography; genes; phosphates; Astragalus sinicus; plasma membrane; nodulation; nitrogenase; enzyme activity; organogenesis;     Show all 20 Subjects
Abstract:
... The AsPPD1 gene from Astragalus sinicus encodes a purple acid phosphatase. To address the functions of AsPPD1 in legume-rhizobium symbiosis, its expression patterns, enzyme activity, subcellular localization, and phenotypes associated with its over-expression and RNA interference (RNAi) were investigated. The expression of AsPPD1 was up-regulated in roots and nodules after inoculation with rhizobi ...
DOI:
10.1007/s11103-015-0323-0

10. A putative 3‐hydroxyisobutyryl‐CoA hydrolase is required for efficient symbiotic nitrogen fixation in Sinorhizobium meliloti and Sinorhizobium fredii NGR234

Author:
Zamani, Maryam; diCenzo, George C.; Milunovic, Branislava; Finan, Turlough M.
Source:
Environmental microbiology 2017 v.19 no.1 pp. 218-236
ISSN:
1462-2912
Subject:
nitrogen fixation,   etc   ; 3-hydroxybutyric acid; Ensifer meliloti; Leucaena leucocephala; Macroptilium atropurpureum; Sinorhizobium fredii; Vigna unguiculata; alfalfa; enzyme activity; genes; host plants; hydrolases; metabolism; mutants; nitrogenase; symbionts; symbiosis; toxicity; valine;     Show all 19 Subjects
Abstract:
... We report that the smb20752 gene of the alfalfa symbiont Sinorhizobium meliloti is a novel symbiotic gene required for full N₂‐fixation. Deletion of smb20752 resulted in lower nitrogenase activity and smaller nodules without impacting overall nodule morphology. Orthologs of smb20752 were present in all alpha and beta rhizobia, including the ngr_b20860 gene of Sinorhizobium fredii NGR234. A ngr_b20 ...
DOI:
10.1111/1462-2920.13570

11. A unifying framework for dinitrogen fixation in the terrestrial biosphere

Author:
Houlton, Benjamin Z.; Wang, Ying-Ping; Vitousek, Peter M.; Field, Christopher B.
Source:
Nature 2008 v.454 no.7202 pp. 327-330
ISSN:
0028-0836
Subject:
nitrogen fixation,   etc   ; plant nutrition; symbiosis; symbionts; tropics; tropical forests; air temperature; nutrient availability; nutrient uptake; soil enzymes; savannas; nitrogenase; enzyme activity; biogeochemical cycles; phosphorus;     Show all 15 Subjects
Abstract:
... Dinitrogen (N2) fixation is widely recognized as an important process in controlling ecosystem responses to global environmental change, both today and in the past; however, significant discrepancies exist between theory and observations of patterns of N2 fixation across major sectors of the land biosphere. A question remains as to why symbiotic N2-fixing plants are more abundant in vast areas of ...
DOI:
10.1038/nature07028
PubMed:
18563086

12. Cell-specific expression of the promoters of two nonlegume hemoglobin genes in a transgenic legume, Lotus corniculatus

Author:
Andersson, C.R.; Llewellyn, D.J.; Peacock, W.J.; Dennis, E.S.
Source:
Plant physiology 1997 v.113 no.1 pp. 45-57
ISSN:
0032-0889
Subject:
nitrogen fixation,   etc   ; developmental stages; promoter regions; Parasponia; gene expression; Casuarina glauca; Lotus corniculatus; leghemoglobin; root nodules; amino acid sequences; transcription (genetics); Rhizobium; enzyme activity; histochemistry; Trema; gene transfer; symbiosis; transgenic plants; hemoglobin; reporter genes; beta-glucuronidase;     Show all 21 Subjects
Abstract:
... The promoters of the hemoglobin genes from the nitrogen-fixing tree Parasponia andersonii and the related nonnitrogen-fixing Trema tomentosa both confer beta-glucuronidase reporter gene expression to the central zone of the nodules of a transgenic legume, Lotus corniculatus. beta-Glucuronidase expression was high in the uninfected interstitial cells and parenchyma of the surrounding boundary layer ...
PubMed:
9008386
PubMed Central:
PMC158114

13. Characterization of a symbiotic, heterocystous, N2-fixing cyanobacterium from Cycas coralloid roots

Author:
Sharma, A.; Mishra, D.P.; Kumar, A.
Source:
World journal of microbiology & biotechnology 1992 v.8 no.5 pp. 529-531
ISSN:
0959-3993
Subject:
nitrogen fixation,   etc   ; Cycas revoluta; Cyanobacteria; nitrogenase; enzyme activity; nitrate reductase; plasmids; symbionts; symbiosis; roots;     Show all 10 Subjects
DOI:
10.1007/BF01201954
PubMed:
24425570

14. Comparative efficiency of Rhizobium/Bradyrhizobium spp. strains in nodulating Cajanus cajan in relation to characteristic metabolic enzyme activities

Author:
Anand, R.C.; Dogra, R.C.
Source:
Biology and fertility of soils 1997 v.24 no.3 pp. 283-287
ISSN:
0178-2762
Subject:
nitrogen fixation,   etc   ; Cajanus cajan; cultivars; Rhizobium; Bradyrhizobium; strains; symbiosis; nodulation; mass; shoots; correlation; dry matter accumulation; nitrogenase; enzyme activity; biomass production;     Show all 15 Subjects
Abstract:
... The comparative symbiotic properties of Rhizobium spp. and Bradyrhizobium spp. strains infecting pigeon pea were evaluated. Bradyrhizobium strains (Cajanus) were found to be superior to Rhizobium strains (Cajanus) and the superiority was ascertained to be due to the higher enzyme activity of the tricarboxylic acid (TCA) cycle in comparison to Rhizobium spp. strains. Moreover, metabolic superiority ...
DOI:
10.1007/s003740050244

15. Control of de novo purine biosynthesis genes in ureide-producing legumes: induction of glutamine phosphoribosylpyrophosphate amidotransferase gene and characterization of its cDNA from soybean and Vigna

Author:
Kim, J.H.; Delauney, A.J.; Verma, D.P.S.
Source:
The plant journal 1995 v.7 no.1 pp. 77-86
ISSN:
0960-7412
Subject:
nitrogen fixation,   etc   ; Glycine max; Vigna aconitifolia; DNA; clones; genetic code; gene expression; nucleotide sequences; glutamine; transferases; purines; biosynthesis; enzyme activity; amino acid sequences; root nodules; symbiosis;     Show all 16 Subjects
DOI:
10.1046/j.1365-313X.1995.07010077.x
PubMed:
7894513

16. Deletion of the SACPD-C Locus Alters the Symbiotic Relationship Between Bradyrhizobium japonicum USDA110 and Soybean, Resulting in Elicitation of Plant Defense Response and Nodulation Defects

Author:
Krishnan, Hari B.; Alaswad, Alaa A.; Oehrle, Nathan W.; Gillman, Jason D.
Source:
Molecular plant-microbe interactions 2016 v.29 no.11 pp. 862-877
ISSN:
0894-0282
Subject:
nitrogen fixation,   etc   ; Bradyrhizobium japonicum; Glycine max; ammonia; ascorbate peroxidase; enzyme activity; gene expression; genotype; growth and development; isoleucine; jasmonic acid; loci; mass spectrometry; mutants; nitrogen; nitrogenase; nodulation; oleic acid; pathogenesis-related proteins; pathogens; plant hormones; root nodules; salicylic acid; seeds; soil bacteria; soybeans; stearic acid; superoxide dismutase; symbiosis; transmission electron microscopy; two-dimensional gel electrophoresis;     Show all 31 Subjects
Abstract:
... Legumes form symbiotic associations with soil-dwelling bacteria collectively called rhizobia. This association results in the formation of nodules, unique plant-derived organs, within which the rhizobia are housed. Rhizobia-encoded nitrogenase facilitates the conversion of atmospheric nitrogen into ammonia, which is utilized by the plants for its growth and development. Fatty acids have been shown ...
Handle:
10113/5600610
DOI:
10.1094/MPMI-08-16-0173-R

17. Direct measurement of release and assimilation of ammonia in the Gunnera-Nostoc symbiosis

Author:
Silvester, W.B.; Parsons, R.; Watt, P.W.
Source:
New phytologist 1996 v.132 no.4 pp. 617-625
ISSN:
0028-646X
Subject:
nitrogen fixation,   etc   ; asparagine; ammonia; nitrogen metabolism; symbiosis; glutamine; stem nodules; stable isotopes; acetylene; glutamic acid; nitrogenase; enzyme activity; amino acid metabolism; Cycadaceae; Nostoc; light;     Show all 16 Subjects
DOI:
10.1111/j.1469-8137.1996.tb01880.x

18. Diurnal and seasonal patterns of nitrogenase activity of red alder in comparison with white clover in silvopastoral agroforestry systems

Author:
Teklehaimanot, Z.; Martin, R.
Source:
Biology and fertility of soils 1999 v.28 no.3 pp. 267-270
ISSN:
0178-2762
Subject:
nitrogen fixation,   etc   ; Alnus rubra; Trifolium repens; symbiosis; root nodules; diurnal variation; seasonal variation; soil fertility; acetylene; Rhizobium; silvopastoral systems; nitrogenase; enzyme activity; biogeochemical cycles; measurement; Wales;     Show all 16 Subjects
Abstract:
... Simultaneous measurements were made to assess the diurnal and seasonal patterns of nitrogenase activity of red alder (Alnus rubra Bong.) and white clover (Trifolium repens L.) growing together in a silvopastoral agroforestry system using the acetylene reduction assay. Diurnal measurements were made in the summer and autumn at 3-h intervals whereas seasonal nitrogenase activity was assessed based o ...
DOI:
10.1007/s003740050492

19. Diversity and probiotic activities of endophytic bacteria associated with the coastal halophyte Messerschmidia sibirica

Author:
Zhang, Chengwei; Tian, XueYing; Zhang, Cheng-Sheng
Source:
Applied soil ecology 2019 v.143 pp. 35-44
ISSN:
0929-1393
Subject:
nitrogen fixation,   etc   ; 1-aminocyclopropane-1-carboxylate deaminase; Acidovorax avenae subsp. citrulli; Alternaria alternata; Bacillus subtilis; Pectobacterium carotovorum; Phytophthora nicotianae; Pseudomonas alcaliphila; Pseudomonas syringae pv. lachrymans; Ralstonia solanacearum; abiotic stress; antimicrobial properties; bacteria; biotic stress; coasts; disease resistance; endophytes; enzyme activity; genes; halophytes; host plants; indole acetic acid; leaves; phylogeny; plant growth; plant pathogens; probiotics; ribosomal RNA; roots; secretion; siderophores; species richness; stems; symbiosis; tissues; China;     Show all 36 Subjects
Abstract:
... There is an increasing interest for exploitation and utilization of endophyte resources. However, little was known about endophytic bacteria (EB) associations with halophytes. It is hypothesized that EB from halophytes have evolved mechanisms that promote plant growth, while improving host-plant resistance to biotic and abiotic stress. The present study is the first to examine culturable EB coloni ...
DOI:
10.1016/j.apsoil.2019.05.030

20. Effect of faba bean (Vicia faba L.)–rhizobia symbiosis on barley's growth, phosphorus uptake and acid phosphatase activity in the intercropping system

Author:
Mouradi, Mohammed; Farissi, Mohamed; Makoudi, Bouchra; Bouizgaren, Abdelaziz; Ghoulam, Cherki
Source:
Annals of Agrarian Science 2018 v.16 no.3 pp. 297-303
ISSN:
1512-1887
Subject:
nitrogen fixation,   etc   ; Vicia faba; acid phosphatase; barley; energy; enzyme activity; faba beans; farmers; flowering; intercropping; minerals; nodulation; phosphorus; phytases; rhizosphere; soil; symbiosis;     Show all 17 Subjects
Abstract:
... Faba bean (Vicia faba L.) is often grown under several nutritional and environmental constraints such as phosphorus (P) deficiency. In the soil, P massively precipitates to form insoluble complexes with the minerals. Cereals-legumes intercropping may promote cereal growth by increasing the amount of available P and N by the legume. The legumes N2-fixing symbiosis rely on large quantities of phosph ...
DOI:
10.1016/j.aasci.2018.05.003