Research progress on the relieving effect of exogenous substances on plant salt stress
Salt stress is one of the abiotic factors that have an important impact on plant growth and development,and exogenous sub-stances can effectively alleviate the negative effects of salt stress on plants.This article mainly reviews the regulatory mechanisms and allevi-ating effects of different exogenous substances(salicylic acid,betaine,and calcium chloride)on plant growth under salt stress,and looks forward to the alleviating effects of exogenous substances on the germination and seedling stages of forage grass under salt stress,in order to provide a theoretical basis for the restoration and improvement of vegetation in saline alkali lands.