Research progress on physiological and molecular responses of plant roots under abiotic stress
Drought,flooding,salinity,high temperature and other abiotic stresses are important environmental fac-tors that affect plant growth and development.As the first organ to perceive adversity under stress,roots play an im-portant role in responding to stress damage.At present,most of the research on plant response to abiotic stress focu-ses on aboveground organs such as leaves,and the research on root resistance is not deep.Based on this,this paper systematically summarized the response of plant roots to environmental stresses such as drought,flooding,salinity and alkalinity from two perspectives∶physiology and molecular biology.The main contents include osmotic adjust-ment,antioxidant defense system,endogenous hormones and other physiological changes,as well as selective expres-sion of related stress-resistant genes.It elucidated that on one hand,roots could produce a series of oxidative regula-tion through signal perception to reduce the physiological damage caused by stress,on the other hand,they could promote the selective expression of downstream genes to produce corresponding metabolites to alleviate stress.In or-der to enrich the resources of plant root resistance and select resistant varieties,future research can focus on plants with ornamental value and ecological benefits,and strengthen the study of plant root response under compound stress and temperature stress.Genomics,transcriptomics,metabolomics and other methods can be used to further explore the molecular response of plant roots under environmental stress.
万方数据
维普
