Research Progress in the Composition Analysis and Ecological Function of Plant Root Exudates Under Salt Stress
Salt stress as one of the common abiotic stresses can affect plant growth and development.Root exudates are considered as an important medium for"information"exchange between plants and rhizosphere environment.When plants sufferred in salt stress,the composition and content of root exudates would change to affect the growth and development of plants.This article summarizes the components,detection methods,mechanism of action and changing trends.Root exudates mainly contained amino acids,sugars,organic acids and phenolic acids,etc.The high performance liquid chromatography(HPLC),gas chromatography-mass spectrometry(GC-MS),liquid chromatography-mass spectrometry(LC-MS)and nuclear magnetic resonance(NMR)are widely used to identify and detect compositions and contents of root exudates.Combined with previous studies,the changes of composition and content of amino acids,sugars,organic acids,etc.under salt stress were summarized.From the aspect of physical and chemical environment and rhizosphere microorganisms,the putative roles of root exudates under salt stress were also summarized,including:1)acting as signal molecules in plant suffering to salt tolerance;2)maintaining the homeostasis of root cells;and 3)affecting rhizosphere environment.The change mechanism of amino acids and sugars in salt tolerance of plants were enumerated.Moreover,we pointed out that,the identification of root exudates function and their mechanisms of action on salt stress need further being studied.This review aims to analyze the ecological effects of plant root exudates under salt stress,and provides a reference for further exploring the mechanism of plant response to salt stress in the future.
root exudatessalt stresscomponent identificationrhizosphere environmentrhizosphere microorganismsmechanism of salt tolerancechanging mechanism
万方数据
维普
