The Plant Growth Promoting Rhizobacteria.
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In the latter case, please turn on Javascript support in your web browser and reload this page. A total of rhizobacteria were isolated from seven different tea estates of Darjeeling, West Bengal, India. Based on a functional screening of in vitro plant growth-promoting PGP activities, thirty potential rhizobacterial isolates were selected for in-planta evaluation of PGP activities in rice and maize crops. All the thirty rhizobacterial isolates were identified using partial 16S rRNA gene sequencing.
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Out of thirty rhizobacteria, sixteen Treatment of rice and maize seedlings with these thirty rhizobacterial isolates resulted in growth promotion. Besides, rhizobacterial treatment in rice triggered enzymatic [ascorbate peroxidase APXcatalase CATchitinase, and phenylalanine ammonia-lyase PAL ], and non-enzymatic link and polyphenolics] antioxidative defense reactions indicating their possible role in the reduction of reactive oxygen species ROS burden and thereby priming of plants towards stress mitigation.
To understand such a possibility, we tested the effect of rhizobacterial consortia on biotic stress tolerance of https://amazonia.fiocruz.br/scdp/essay/pathetic-fallacy-examples/the-army-as-a-staff-sergeant.php against necrotrophic fungi, Rhizoctonia solani AG1-IA. Our results indicated that the pretreatment with rhizobacterial consortia increased resistance of the rice plants towards the common foliar pathogen like R. This study supports the idea of the application of plant growth-promoting rhizobacterial consortia in sustainable crop practice through the management of biotic stress under field conditions.
A diverse population of soil bacteria usually inhabits plant rhizospheres. A subset of these is beneficial to the plants in terms of promoting their growth. These bacteria, therefore, are very commonly referred to as plant growth-promoting rhizobacteria PGPR and serve as potential environment-friendly substitutes of chemical fertilizers 12. Phytostimulating rhizobacteria, in general, do not show host specificity and can exhibit their growth-promoting features when associated with a broad range of hosts 3. This makes them very suitable as biofertilizers as their application can be extended to multiple plants that might not serve as their natural hosts.
Original Research ARTICLE
In the case of biocontrol, for endophytic and mycorrhiza helper PGPR, however, genotype-dependent specificity in PGPR- plant cooperation has been reported 34. PGPR contributes to the general well-being of the associated plants either by direct or indirect manner 1. In the direct mechanism, PGPR stimulates plant growth by fixing atmospheric nitrogen, solubilizing soil insoluble phosphates and potassium, making iron available for the host plant, and finally, by producing different phytohormones to The Plant Growth Promoting Rhizobacteria plant growth 1. The indirect mechanism of PGPR involves the protection of plants from biotic and abiotic stresses. The major indirect mechanisms adopted by PGPR are hydrolytic enzyme production, exo-polysaccharide production, bioremediation of heavy Rhizibacteria, and stimulation of induced systemic resistance ISR 1.]
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