title: Enhancement of drought stress tolerance in crops by plant growth promoting rhizobacteria.
abstract: 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.
authors: Department of Microbiology, Agri Biotech Foundation, PJTS Agricultural University Campus, Rajendranagar, Hyderabad 500030, Telangana State, India.
authors: Sai Shiva Krishna Prasad
authors: SS
authors: Vurukonda
authors: Department of Microbiology, Agri Biotech Foundation, PJTS Agricultural University Campus, Rajendranagar, Hyderabad 500030, Telangana State, India.
authors: Sandhya
authors: S
authors: Vardharajula
authors: Department of Microbiology, Agri Biotech Foundation, PJTS Agricultural University Campus, Rajendranagar, Hyderabad 500030, Telangana State, India.
authors: Manjari
authors: M
authors: Shrivastava
authors: Department of Microbiology, Agri Biotech Foundation, PJTS Agricultural University Campus, Rajendranagar, Hyderabad 500030, Telangana State, India. Electronic address: skzali28@gmail.com.
authors: Ali
authors: A
authors: SkZ
mesh_terms: D018556:Crops, Agricultural / Q000254:growth & development*; D060467:Disease Resistance; D055864:Droughts; D006133:Growth Substances / Q000378:metabolism*; D063245:Plant Development; D018517:Plant Roots / Q000382:microbiology*; D012988:Soil Microbiology; D013312:Stress, Physiological
chemical_list: D006133:Growth Substances
keywords: Adaptation; Drought stress; Induced Systemic tolerance; Mitigation; Plant growth promoting rhizobacteria