环境胁迫如酸雨、铝毒、镉毒、盐渍、干旱及温度等已严重危害植物的生长，进而影响到人类的生产生活。已有研究显示，外源钙的施加能缓解植物在这些环境胁迫下的伤害，但是钙受体（Ca2+-sensingreceptor，CAS）在外源钙缓解环境胁迫中发挥何种作用及变化规律却仍然不清楚。 本文以模式植物拟南芥（Arabidopsisthaliana）哥伦比亚野生型为材料，结合生理指标测定、蛋白质印迹（Westernblot）等实验手段，研究了不同钙浓度在模拟酸雨、铝毒、镉毒、盐害、干旱、低温及高温胁迫下对拟南芥发芽率、根长及CAS的表达的影响。以期了解外源钙对这些胁迫所引起的植物生理生化的影响与CAS这个...Environmental stresses, such as acid rain, aluminium toxicity, cadmium toxicity, saline, drought, low and high temperature have already been proved to severely limit the plant growth and productivity formation in individual and the biospheric scale. A numbers of studies have also shown that exogenous Ca2+ alleviates the plant injuries caused by mentioned environmental stresses. However, the roles ...学位：理学硕士院系专业：生命科学学院生物学系_生态学学号：2162007115190
