Page 617 - e-Book

Plant Growth Promoting Rhizobacteria (PGPR) and Their

Mechanisms of Action for Enhancing Crop Productivity

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Shanu Khandelval , S.R. Maloo , Ekta Joshi , G.L.Sharma
1 Pacific Academic of Higher Education and Research University Udaipur 313 002, India.
2 Nalanda Arts and Science College, Gandhinagar, Gujarat University 382 016, India.
shanu83khandelval@gmail.com

Abstract

Expanding human population and the heightening food demand led to green evolution which

brought about expanded worldwide agriculture production and saved around one billion
individuals from starvation and malnourishment. Alongside different advances, green

insurgency additionally set off the consumption of chemical fertilizer. Since the beginning of

development, individuals have been associated with different activities in a roundabout way
affecting our ecosystem. The practice of chemical fertilizers continuously reduces the nutrient

status of soil and is hazardous to the ecosystem and crop production. For developing

countries, the significant expense of fertilizers is another serious issue and therefore the
alternate strategies have been developed for agriculture. Under such conditions, it requires

suitable exploitation of biotechnology to enhance the yield efficiency as well as to increase
the crop productivity through interaction between plant root system and soil microbial

population.
Plant growth promoting rhizobacteria (PGPR) are a group of free-living bacteria that colonize

the rhizosphere and contribute to increased growth and yield of crop plants. As plant

growth promoting rhizobacteria (PGPR) exert a constructive influence on crop productivity
and ecosystem functioning through mechanisms of biopesticides, biofertilizers,

phytostimulators and rhizoremidiators can be the ray of hope for the continuous improvement
and induce the plant development. The direct and also meandering instrument applied by

PGPR for plant advancement induction can address the run of the typical issues of altering,
for instance, the cost of mixture manures, prosperity and regular concerns of substance

pesticides and soil fertility. This review focuses on the details of different types of PGPR and

their direct and indirect mechanisms of action for plant growth development and use of PGPR
for increasing crop productivity.

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