Probing into the unique relationship between a soil bacterium, Pseudomonas putida AKMP7 and Arabidopsis thaliana: A case of “conditional pathogenesis”

N.S, Raja Gopalan; Sharma, Raunak; Mohapatra, Sridev

doi:10.1016/j.plaphy.2022.05.003

Cited by 10 publications

(2 citation statements)

References 61 publications

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“…Cytokinin production has long been known to be associated with some plant-pathogenic Pseudomonas strains and has also been described in some plant-beneficial ones (García de Salamone et al, 2001;Pérez-Martínez et al, 2008;Großkinsky et al, 2016). The tZ-producing strain P. putida AKMP7 has been shown to alleviate heat stress in wheat (Ali Shaik et al, 2011;Raja Gopalan et al, 2022). Another cytokinin-producing Pseudomonas strain, Pseudomonas sp.…”

Section: Cytokinins Biosynthesismentioning

confidence: 99%

Pseudomonas spp. can help plants face climate change

Zboralski

Filion

2023

Front. Microbiol.

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Climate change is increasingly affecting agriculture through droughts, high salinity in soils, heatwaves, and floodings, which put intense pressure on crops. This results in yield losses, leading to food insecurity in the most affected regions. Multiple plant-beneficial bacteria belonging to the genus Pseudomonas have been shown to improve plant tolerance to these stresses. Various mechanisms are involved, including alteration of the plant ethylene levels, direct phytohormone production, emission of volatile organic compounds, reinforcement of the root apoplast barriers, and exopolysaccharide biosynthesis. In this review, we summarize the effects of climate change-induced stresses on plants and detail the mechanisms used by plant-beneficial Pseudomonas strains to alleviate them. Recommendations are made to promote targeted research on the stress-alleviating potential of these bacteria.

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Section: Cytokinins Biosynthesismentioning

confidence: 99%

Pseudomonas spp. can help plants face climate change

Zboralski

Filion

2023

Front. Microbiol.

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“…Owing to their diverse roles in improving crop production, biological approaches have garnered attention from plant scientists for managing the plant nutrient system. Substantial research has explored the various roles of rhizobacteria in enhancing plant growth [10,14], stress tolerance [12,15], pesticide detoxification [9], the biological control of pathogens [16][17][18][19], phytohormone production [20], ammonia production, and nitrogenase activity [21,22]. Due to these beneficial effects, symbiotic and non-symbiotic rhizobacteria are used globally as bio-inoculants to enhance growth under severe environmental stress [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Modulation of Growth and Antioxidative Defense Mechanism in Wheat (Triticum aestivum L.) Mediated by Plant-Beneficial Strain Pseudomonas veronii MR-15 under Drought Conditions

Rehman,

Shahid,

Mahmood

et al. 2023

Applied Sciences

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Drought stress severely influences plants in various ways and is considered an alarming threat to sustainable crop production worldwide. However, plant-growth-promoting rhizobacteria (PGPRs) have the natural ability to tolerate drought and enable plants to induce stress resistance by altering critical metabolic pathways. In this study, we isolated and characterized a drought-tolerant rhizobacterium from the ground nut (Arachis hypogaea). Sequencing of the 16S rRNA gene traced its lineage to Pseudomonas veronii, named MR-15. The strain exhibited natural capabilities to solubilize phosphate, produce indole acetic acid, and grow a drought medium containing PEG (polyethylene glycol). The seeds of two wheat varieties (Triticum aestivum) inoculated with MR-15 were grown under drought and fully hydrated conditions and showed a significant increase in plant biomass, enhanced cellular antioxidant enzyme activity, and reduced reactive oxygen species. The MR-15 strain also significantly increased pigmentation and protein contents compared to plants raised from seeds grown without inoculation. These beneficial effects were consistent under drought stress conditions, indicating that MR-15 effectively alleviated wheat plants from drought-induced cellular oxidative damage. The findings suggest that MR-15 has the potential to serve as a biofertilizer, and further experiments should be conducted to explore its role in promoting plant growth and yield under drought conditions, particularly in semi-arid and arid zones. This is the first study reporting Pseudomonas veronii as a potential PGPR strain.

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