Role of Plant Growth-Promoting Rhizobacteria in Combating Abiotic and Biotic Stresses in Plants

Mumtaz, Muhammad Zahid; Ahmad, Maqshoof; Mehmood, Khadija; Sheikh, Ahsan Sattar; Malik, Arif; Hussain, Azhar; Nadeem, Sajid Mehmood; Zahir, Zahir Ahmad

doi:10.1007/978-981-16-4843-4_2

Cited by 2 publications

(2 citation statements)

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“…One of the guiding principles of modern agricultural production is the introduction of environmentally sound and harmless approaches that are safe for human health [ 1 , 5 , 6 , 7 ]. Of particular importance and interest for solving this problem is the use of microbiological approaches that are based on the use of the potential of plants and microorganisms and the biological mechanisms of interaction between the components of plant–microbial systems [ 1 , 8 , 9 ]. The use of biologicals based on plant growth-promoting rhizobacterial (PGPR) strains of the genus of Rizobium leguminosarum , demonstrating beneficial properties of plants, is of interest.…”

Section: Introductionmentioning

confidence: 99%

“…The presence of the bacteria R. leguminosarum can regulate in plants such processes as the increased associative fixation of molecular nitrogen [ 1 , 15 , 16 ], additional production of physiologically active compounds, including phytohormones [ 8 , 16 ], and improvement of the water regime of plants [ 16 ]. In addition, rhizobacteria can participate in the dissolution of hard-to-reach phosphorus compounds [ 17 ], produce antibiotic compounds that protect roots from bacterial and fungal infections [ 9 ], and modulate stress reactions in plants, thereby increasing their resistance to adverse external factors and other influences [ 16 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Rhizobium leguminosarum Thy2 on the Growth and Tolerance to Cadmium Stress of Wheat Plants

Maslennikova

Nasyrova

Chubukova

et al. 2022

Life

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Cadmium (Cd) stress is an obstacle for crop production, quality crops, and sustainable agriculture. An important role is played by the application of eco-friendly approaches to improve plant growth and stress tolerance. In the current study, a pre-sowing seed treatment with Rhizobium leguminosarum strains, isolated from the leguminous plants Phaseolus vulgaris (strain Pvu5), Vicia sylvatica (strain VSy12), Trifolium hybridium (strain Thy2), and T. pratense (strain TPr4), demonstrated different effects on wheat (Triticum aestivum L.) plant growth under normal conditions. Among all tested strains, Thy2 significantly increased seed germination, seedling length, fresh and dry biomass, and leaf chlorophyll (Chl) content. Further analysis showed that Thy2 was capable of producing indole-3-acetic acid and siderophores and fixing nitrogen. Under Cd stress, Thy2 reduced the negative effect of Cd on wheat growth and photosynthesis and had a protective effect on the antioxidant system. This was expressed in the additional accumulation of glutathione and proline and the activation of glutathione reductase. In addition, Thy2 led to a significant reduction in oxidative stress, which was evidenced by the data on the stabilization of the ascorbate content and the activity of ascorbate peroxidase. In addition, Thy2 markedly reduced Cd-induced membrane lipid peroxidation and electrolyte leakage in the plants. Thus, the findings demonstrated the ability of the R. leguminosarum strain Thy2, isolated from T. hybridium nodules, to exert a growth-promoting and anti-stress effect on wheat plants. These results suggest that the Thy2 strain may enhance wheat plant growth by mitigating Cd stress, particularly through improving photosynthesis and antioxidant capacity and reducing the severity of oxidative damage. This may provide a basic and biological approach to use the Thy2 strain as a promising, eco-friendly candidate to combat Cd stress in wheat production.

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