根际细菌
根际
生物
渗透压
耐旱性
渗透调节剂
干旱胁迫
农学
非生物胁迫
微生物
植物
脯氨酸
细菌
基因
生物化学
氨基酸
遗传学
作者
Sai Shiva Krishna Prasad Vurukonda,Sandhya Vardharajula,Manjari Shrivastava,Ali SkZ
标识
DOI:10.1016/j.micres.2015.12.003
摘要
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.
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