渗透胁迫下Ca^(2+)对龙眼叶片光合色素及膜脂过氧化的影响

Effects of Ca2+ on Photosynthetic Pigments and Lipid Peroxidation of Longan Leaves under Osmotic Stress

对ＰＥＧ渗透胁迫下的离体龙眼叶片进行Ｃａ（ＮＯ３）２处理，结果表明，Ｃａ２＋可以减缓渗透胁迫引起的叶绿素含量下降和膜脂过氧化作用。Ｃａ２＋的作用可被Ｃａ２＋专一螯合剂ＥＧＴＡ所削弱。

The detached longan leaves were treated with Ca (NO3)2 under PEG osmotic stress. The results showed that Ca2+ could partly inhibit the decrease of chlorphyl and carotenoid contents induced by PEG and improve the stability of plasma membrane. Such effect of Ca2+ could be reduced by EGTA. 