低温下水稻幼苗叶片细胞膜膜脂过氧化和膜磷脂脱酯化反应

Membrane lipid peroxidation and de_esterification of membrane phosphatide in leaves of rice seedlings under chilling stress

水稻幼苗遭遇冷胁迫（１℃，光照强度１５０μｍｏｌ·ｍ－２·ｓ－１）２ｄ，其叶片丙二醛（ＭＤＡ）含量明显增加，酸性磷酸酯酶活性也增加，同时无机磷含量也增加。３０ｍｍｏｌ／Ｌ的ＣａＣｌ２浸泡种子１ｄ则削弱了冷胁迫的这种作用。Ｈ２Ｏ２和甲基紫精（ＭＶ）均有刺激幼苗叶片和离体根质膜酸性磷酸酯酶活性的作用。

After chilling stress at 1 ℃ under a PFD of 150 μmol·m-2·s-1 for two days, content of MDA, activity of acid phosphatase and content of soluble phosphorus in leaves all increasedMethod of rice seeds submerged in 30 mmol/L CaCl2 solution for one day reduced all the above changes induced by chilling stressThe activities of acid phosphatase in both leaves of seedlings and plasma membrane from roots in vitro were induced by both H2O2 and MV.