Enhancement of drought stress tolerance in crops by plant growth promoting rhizobacteria

Drought is one of the major constraints on agricultural productivity worldwide and is likely to further increase. Several adaptations and mitigation strategies are required to cope with drought stress. Plant growth promoting rhizobacteria (PGPR) could play a significant role in alleviation of drough...

Full description

Saved in:
Bibliographic Details
Published in:Microbiological research 2016-03, Vol.184, p.13-24
Main Authors: Vurukonda, Sai Shiva Krishna Prasad, Vardharajula, Sandhya, Shrivastava, Manjari, SkZ, Ali
Format: Article
Language:English
Subjects:
Adaptation
Crops, Agricultural - growth & development
Disease Resistance
Drought stress
Droughts
Growth Substances - metabolism
Induced Systemic tolerance
Mitigation
Plant Development
Plant growth promoting rhizobacteria
Plant Roots - microbiology
Soil Microbiology
Stress, Physiological
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Drought is one of the major constraints on agricultural productivity worldwide and is likely to further increase. Several adaptations and mitigation strategies are required to cope with drought stress. Plant growth promoting rhizobacteria (PGPR) could play a significant role in alleviation of drought stress in plants. These beneficial microorganisms colonize the rhizosphere/endo-rhizosphere of plants and impart drought tolerance by producing exopolysaccharides (EPS), phytohormones, 1-aminocyclopropane- 1-carboxylate (ACC) deaminase, volatile compounds, inducing accumulation of osmolytes, antioxidants, upregulation or down regulation of stress responsive genes and alteration in root morphology in acquisition of drought tolerance. The term Induced Systemic Tolerance (IST) was coined for physical and chemical changes induced by microorganisms in plants which results in enhanced tolerance to drought stresses. In the present review we elaborate on the role of PGPR in helping plants to cope with drought stress.
ISSN:0944-5013
1618-0623
DOI:10.1016/j.micres.2015.12.003