Signs of a phyllospheric lifestyle in the genome of the stress-tolerant strain Azospirillum brasilense Az19

García, Julia E.; Labarthe, Maria M.; Pagnussat, Luciana A.; Amenta, Melina; Creus, Cecilia M.; Maroniche, Guillermo Andrés

doi:10.1016/j.syapm.2020.126130

Cited by 7 publications

(4 citation statements)

References 56 publications

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“…Another study also revealed the effect of PGPRs on Arabidopsis thaliana shoots and roots development by influencing division and differentiation of cells in primary and lateral roots development which consequently leads to shoot development (23). It has been reported that there is not only auxin that may stimulate the growth of plants but some other substances like nitric oxide, carotenoids as in the case of Azospirillum brasilense that contribute to better growth of plants (24). Stimulation of plants by Bacillus is well reported by Ahmad et al (25).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Bacillus and Rhizobium Strains to Enhance the Growth of Vigna radiata (L.) under Drought Stress

Tanveer

Ali

2022

Pak Euro. J. Med & LS

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In the present study, strains of Bacillus and Rhizobium were evaluated for their efficacy to produce auxin and to enhance the growth of Vigna radiata (L.) under drought stress. Colorimetric analysis indicated the production of auxin in bacterial culture supernatants in the presence of 0, 200, and 500 µg ml-1 L-tryptophan. At 500 µg ml-1 of L-tryptophan, B. subtilis Z-24, and B. simplex Z-38 produced significant levels of 41.4 and 24.8 µg ml-1 auxin, respectively. High Performance Liquid Chromatography (HPLC) also detected the auxin production by bacterial strains. In vitro rooting assay also recorded maximum increase in number of lateral roots with B. simplex Z-02, over control. For pot trials, seeds treated with single and mixed bacterial cultures were grown under 28%, 20%, and 10% field capacities (FC) of loamy soils. At 28% FC (normal water level), maximum increase of 28% dry weight was observed for R. rosettiformans Z-30; as compared to respective control. At 10% FC (highest water stress), significant increases of 87% and 70% in fresh weight and root length were recorded by B. cereus Z-59 and B. simplex Z-37, respectively. In case of mixed culture, C-3 (Z-38, Z-20, and Z- 30) and C-2 (Z-59, Z-20, and Z-23) were the most effective to enhance up to 68% dry weight and 13% shoot length of plants under drought stress (10% FC). Results showed that Bacillus and Rhizobium strains have the potential to produce auxin and improved the growth of mung beans under drought stressed conditions.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Bacillus and Rhizobium Strains to Enhance the Growth of Vigna radiata (L.) under Drought Stress

Tanveer

Ali

2022

Pak Euro. J. Med & LS

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“…The genome of A. brasilense Sp7 encodes one home and twenty-two alternative ECFs, consisting of ten RpoE, five RpoH, one RpoN, and six FecI sigma factors [53]. Fourteen rpoE genes and five rpoH genes were found in the genome of A. brasilense Az19 [54].…”

Section: Azospirillum Response To Stressmentioning

confidence: 99%

Molecular Mechanisms Determining the Role of Bacteria from the Genus Azospirillum in Plant Adaptation to Damaging Environmental Factors

Gureeva

Gureev

2023

IJMS

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Agricultural plants are continuously exposed to environmental stressors, which can lead to a significant reduction in yield and even the death of plants. One of the ways to mitigate stress impacts is the inoculation of plant growth-promoting rhizobacteria (PGPR), including bacteria from the genus Azospirillum, into the rhizosphere of plants. Different representatives of this genus have different sensitivities or resistances to osmotic stress, pesticides, heavy metals, hydrocarbons, and perchlorate and also have the ability to mitigate the consequences of such stresses for plants. Bacteria from the genus Azospirillum contribute to the bioremediation of polluted soils and induce systemic resistance and have a positive effect on plants under stress by synthesizing siderophores and polysaccharides and modulating the levels of phytohormones, osmolytes, and volatile organic compounds in plants, as well as altering the efficiency of photosynthesis and the antioxidant defense system. In this review, we focus on molecular genetic features that provide bacterial resistance to various stress factors as well as on Azospirillum-related pathways for increasing plant resistance to unfavorable anthropogenic and natural factors.

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“…Interestingly, in A. brasilense , the genome comprises multiple chromosomes with replicons of 600, 1000, and 1700 kb. The existence of multiple chromosomes in A. brasilense was corroborated, but a 2500 kb extra chromosome was reported [ 65 , 66 ].…”

Section: Genetics Of Azospirillum Speciesmentioning

confidence: 99%

Azospirillum spp. from Plant Growth-Promoting Bacteria to Their Use in Bioremediation

et al. 2022

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Xenobiotic contamination, a worldwide environmental concern, poses risks for humans, animals, microbe health, and agriculture. Hydrocarbons and heavy metals top the list of toxins that represent a risk to nature. This review deals with the study of Azospirillum sp., widely reported as plant growth-promoting bacteria in various cultures. However, its adaptation properties in adverse environments make it a good candidate for studying remediation processes in environments polluted with hydrocarbons and heavy metals. This review includes studies that address its properties as a plant growth promoter, its genomics, and that evaluate its potential use in the remediation of hydrocarbons and heavy metals.

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Signs of a phyllospheric lifestyle in the genome of the stress-tolerant strain Azospirillum brasilense Az19

Cited by 7 publications

References 56 publications

Evaluation of Bacillus and Rhizobium Strains to Enhance the Growth of Vigna radiata (L.) under Drought Stress

Evaluation of Bacillus and Rhizobium Strains to Enhance the Growth of Vigna radiata (L.) under Drought Stress

Molecular Mechanisms Determining the Role of Bacteria from the Genus Azospirillum in Plant Adaptation to Damaging Environmental Factors

Azospirillum spp. from Plant Growth-Promoting Bacteria to Their Use in Bioremediation

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