Research Progress in PGPR Improving Plant's Resistance to Salt and Alkali

doi:10.13560/j.cnki.biotech.bull.1985.2018-0860

Abstract

Abstract: Soil salinization has become one of major factors limiting plant growth and reducing crop yield,thus seriously restricting the development of agriculture. Enhancing plant's resistance to salt and alkali may lay the foundation for improving the sustainable and efficient development of agriculture in China. Here the research status of plant growth-promoting rhizobacteria（PGPR）and the diversity of halotolerant PGPR are briefly reviewed. Furthermore,mechanisms of PGPR inducing plants to build the resistance and tolerance to salt and alkali are discussed,i.e.,changing plant physiology and substance metabolism via producing physiologically active substances such as phytohormone,1-aminocyclopropane-1-carboxylic acid（ACC）deaminase,antioxidant defense substances,osmotic adjustment substances,exopolysaccharides（EPS）,and volatile organic compounds（VOCs）. In addition,some PGPR can also regulate the expressions of genes and proteins related to enhancing plant resistance to salt and alkali. The prospect of research on interaction between halotolerant PGPR and plants is carried out,aiming at promoting the large-scale application of PGPR to alleviate salt stress damage and increase yield of plants in saline-alkali soil.

Key words: PGPR, plant, saline-alkali stress, mechanism

JIANG Huan-huan, WANG Tong, CHEN Na, YU Shan-lin, CHI Xiao-yuan, WANG Mian, QI Pei-shi. Research Progress in PGPR Improving Plant's Resistance to Salt and Alkali[J]. Biotechnology Bulletin, 2019, 35(10): 189-197.

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