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The influence of Plant Growth Promoting Rhizobacteria (PGPR) on the reduction of abiotic stresses in crops

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Author(s): Omid Alizadeh | Ali Parsaeimehr

Journal: Extreme Life, Biospeology & Astrobiology
ISSN 2066-7671

Volume: 3;
Issue: 2;
Start page: 93;
Date: 2011;
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Keywords: plant growth bacteria | abiotic stress | crops

ABSTRACT
Plants are always subjected to biotic and abiotic stresses in the environment which haveinfluences on the growth and development of the plants. Beneficial free-living soil bacteria are usuallyreferred as Plant-Growth Promoting Rhizobacteria or PGPR. Different plant growth-promotingRhizosphere bacteria, including associative bacteria such as: Azospirillum, Bacillus, Pseudomonas andEnterobacter group have been used for their beneficial influences on plants. Typically, PGPRs areassociated with plants root and augment plant productivity and immunity; however, recent worksshowed that PGPRs not have just induced the systemic tolerance to abiotic stress such as salt anddrought, but also they have increased the nutrient uptake from soils, and as a result the hazardousaccumulation of nitrates and phosphates in the agricultural soils can be reduced by usage of them.
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