干旱胁迫下外源钙对植物的影响及现状分析

佳木斯大学本科毕业论文（设计）AbstractDrought is one of the most disadvantageous factors in plant growth and development.Becausedrought can hinder the absorption of calcium in plant roots.Calcium is the essential nutrientelement in the process of plant growth.Ca2 has a very positive effect on the importantphysiological metabolism process of plants.Recently,many scientists have confirmed that thedrought resistance of plants can be significantly improved by exogenous calcium.In addition,calcium ion in cells can help plants to transmit drought signals and regulate the physiologicalresponse of plants under drought stress.To some extent,it can alleviate the drought caused bythe lack of calcium ion,make plants normal physiological activities,maintain the balance of ionabsorption,and improve the drought resistance of plants.Therefore,in order to alleviate thedamage caused by drought stress,we can use the appropriate concentration of exogenouscalcium,which also proves that exogenous calcium has certain application value.This paper willfocus on the role of exogenous calcium and drought stress on plants,and briefly describe thecurrent application of exogenous calcium,to provide help for the follow-up study.Key Words:Drought Stress;Exogenous Calcium;plant.第Ⅱ页