Aluminum-tolerant strains of Azospirillum brasilense and their associative nitrogen fixation with finger millet (Eleusine coracana) genotypes in an acid soil.

Rai, R.

doi:10.2323/jgam.37.9

Cited by 5 publications

(4 citation statements)

References 16 publications

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“…The strains should be considered as true Al-tolerant microorganisms, since their tolerance to toxicant was comparable with the most Al-tolerant microorganisms selected by other authors, namely Azospirillum brasilense strain Al r -3 tolerant to 25 mg Al L -1 (Rai, 1991), Curtobacterium herbarum strain CAH5 tolerant to 180 mg Al L -1 (Silambarasan et al, 2019a), Rhodotorula mucilaginosa strain CAM4 tolerant to 60 mg Al L -1 (Silambarasan et al, 2019b), Bacillus megaterium CAM12 and Pantoea agglomerans CAH6 tolerant to 200 mg Al L -1 (Silambarasan et al, 2019c), Kosakonia radicincitans strain CABV2 tolerant to 200 mg Al L -1 (Silambarasan et al, 2022) and strains Klebsiella sp. RC3, Stenotrophomonas sp.…”

Section: Resultsmentioning

confidence: 75%

“…L30 stimulated the growth of barley cultivated in acid soil and decreased accumulation of proline induced by Al toxicity in roots (Belimov et al, 1998). Al-tolerant strains of Azospirillum brasilense improved the growth of rice (Rai, 1986) and finger miller (Rai, 1991) cultivated in acid soil. Positive effects of symbiotic nodule bacteria on nitrogen fixation and adapta-tion to Al toxicity of mung bean (Munns et al, 1979) and soybean (Munns, Hohenberg, Righetti, and Lauter, 1981) were also registered.…”

Section: Micro-biologymentioning

confidence: 99%

“…the role of these bacteria in plant tolerance to Al toxicity and acid soils is scarcely understood. It was shown that some strains of associative nitrogen fixer Azospirillum brasilense had high Al tolerance and improved growth of rice (Rai, 1986) and finger miller (Rai, 1991) cultivated on an acid soil. Increased Al tolerance was observed on barley inoculated with nitrogen-fixing Azospirillum lipoferum 137 and auxin-producing Flavohacterium sp.…”

Section: Micro-biologymentioning

confidence: 99%

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Beneficial aluminium immobilizing microorganisms inhabiting the rhizosphere of pea

Шапошников

Yuzikhin

Syrova

et al. 2023

BioComm

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Acid soils contain elevated concentrations of mobile aluminium (Al) ions which are toxic for plants. Plants form symbioses with the rhizosphere microorganisms stimulating plant growth and affecting Al availability. Here, for the first time the approach based on the ability to immobilize Al in soil was applied for initial selection of beneficial rhizosphere microorganisms. Al-Immobilizing yeast Rhodotorula sp. AL1 and 12 bacterial strains assigned to various genera and species were isolated from the rhizosphere of pea cultivated in acid soils. Immobilization of Al was related to the increased pH of the environment and the formation of insoluble Al phosphates in soil. The strains differed in possessing beneficial properties such as modulation of the nutrient element (Ca, Fe, K, Mg, Mn, P) concentrations in soil, production of phytohormones (auxins, abscisic and gibberellic acids, ethylene), utilization of 1-aminocyclopropane-1-carboxylic acid and organic components typical for root exudates, acetylene reduction and antifungal activities. Eight strains promoted root elongation of radish seedlings by 30÷50 % with a maximal effect exerted by Cupriavidus basilensis strain D39. Taking together, the selected microorganisms are promising models to study the mechanisms of plant-microbe interactions in the presence of toxic Al and improving Al tolerance of plants in acid soils.

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Section: Resultsmentioning

confidence: 75%

Section: Micro-biologymentioning

confidence: 99%

Section: Micro-biologymentioning

confidence: 99%

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Beneficial aluminium immobilizing microorganisms inhabiting the rhizosphere of pea

Шапошников

Yuzikhin

Syrova

et al. 2023

BioComm

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“…However, the role of PGPRs in plant tolerance to Al toxicity and acid soils has received little attention. It was shown that the Al-tolerant associative nitrogen fixer Azospirillum brasilense improved the growth of rice [ 23 ] and finger millet [ 24 ] cultivated in acid soils. An increased Al tolerance of barley inoculated with nitrogen-fixing Azospirillum lipoferum 137 and auxin-producing Flavobacterium sp.…”

Section: Introductionmentioning

confidence: 99%

Aluminum-Immobilizing Rhizobacteria Modulate Root Exudation and Nutrient Uptake and Increase Aluminum Tolerance of Pea Mutant E107 (brz)

Belimov

Шапошников

Azarova

et al. 2023

Plants

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It is well known that plant-growth-promoting rhizobacteria (PGPRs) increase the tolerance of plants to abiotic stresses; however, the counteraction of Al toxicity has received little attention. The effects of specially selected Al-tolerant and Al-immobilizing microorganisms were investigated using pea cultivar Sparkle and its Al-sensitive mutant E107 (brz). The strain Cupriavidus sp. D39 was the most-efficient in the growth promotion of hydroponically grown peas treated with 80 µM AlCl3, increasing the plant biomass of Sparkle by 20% and of E107 (brz) by two-times. This strain immobilized Al in the nutrient solution and decreased its concentration in E107 (brz) roots. The mutant showed upregulated exudation of organic acids, amino acids, and sugars in the absence or presence of Al as compared with Sparkle, and in most cases, the Al treatment stimulated exudation. Bacteria utilized root exudates and more actively colonized the root surface of E107 (brz). The exudation of tryptophan and the production of IAA by Cupriavidus sp. D39 in the root zone of the Al-treated mutant were observed. Aluminum disturbed the concentrations of nutrients in plants, but inoculation with Cupriavidus sp. D39 partially restored such negative effects. Thus, the E107 (brz) mutant is a useful tool for studying the mechanisms of plant–microbe interactions, and PGPR plays an important role in protecting plants against Al toxicity.

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Adaptation of Pseudomonas aeruginosa harbouring the multi-resistance plasmid Rip64 to high levels of mercury chloride, carbenicillin and gentamicin

Tebbe

Olson

1994

Appl Microbiol Biotechnol

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Aluminum-tolerant strains of Azospirillum brasilense and their associative nitrogen fixation with finger millet (Eleusine coracana) genotypes in an acid soil.

Cited by 5 publications

References 16 publications

Beneficial aluminium immobilizing microorganisms inhabiting the rhizosphere of pea

Beneficial aluminium immobilizing microorganisms inhabiting the rhizosphere of pea

Aluminum-Immobilizing Rhizobacteria Modulate Root Exudation and Nutrient Uptake and Increase Aluminum Tolerance of Pea Mutant E107 (brz)

Adaptation of Pseudomonas aeruginosa harbouring the multi-resistance plasmid Rip64 to high levels of mercury chloride, carbenicillin and gentamicin

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