Mechanisms of Plant Response to Saline-alkali Stress:A Review
Saline-alkali stress is one of the abiotic stresses in the process of plant growth and development,which can cause water deficit,changes in cell membrane permeability,metabolic disorders and blockage of protein synthesis in plants,resulting in crop yield reduction or death.Finding effective methods to reduce the harm of saline-alkali stress and strategies to improve the saline tolerance of plants are of great significance to the comprehensive utilization of saline land.In this paper,the latest researches on the damage and adaptive mechanism of plants under saline-alkali stress in recent years were summarized,and the physiological and molecular mechanisms of plants responding to saline-alkali stress were summed up.Furthermore,the physiological mechanisms of plants under saline-alkali stress were analyzed,which were mainly regulated by accumulating osmotic substances,increasing the activity of antioxidant enzymes and ionic compartmentalization,etc.,and the molecular mechanisms were mainly regulated by signal transduction,transcription factor regulation and the expression of plant salt-tolerance-related gene,etc.This study pointed out the trends and urgent problems in the development of plant adaptation to saline-alkali environments,with a view to providing a certain theoretical basis for the selection and cultivation of saline and alkali tolerant plants.
saline-alkali stressphysiological responsepathways of signal transductionmolecular mechanismosmotic substancesactivity of antioxidant enzymes
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