水稻幼苗寒害产生的生化机制研究  

STUDY ON MECHANISM OF COLD INACTIVATION OF VACUOLAR H^+-ATPase ON RICE TONOPLAST

作　　者：董彩华[1] 李松[1] 王志强[1] 王延枝[1] 

机构地区：[1]武汉大学生命科学学院,武汉430072

出　　处：《武汉植物学研究》2000年第2期123-126,共4页Journal of Wuhan Botanical Research

基　　金：国家自然科学基金资助项目!( 3 9570 4 3 4 )

摘　　要：诱导性冷失活是 V型 ATPase的一种共同特性。用荧光光谱技术以水稻液泡膜 H+ -ATPase为研究对象 ,深入探讨了水稻幼苗冷失活现象的机制。研究表明 ,能引起较大程度冷失活现象的物质 ,往往先对膜脂有序性产生影响 ,通过对多种阳离子、阴离子、离子螯合剂导致冷失活能力和导致膜脂有序性变化能力间的比较 ,都能说明这一点。可以认为膜脂状态变化是冷失活机制发生的一个重要方面 ,也是植物早期寒害产生的原因之一。Induced cold inactivation is a general characteristic of V type H + ATPase.In this paper,fluorescence spectrum technique has been used to thoroughly study the mechanism of cold inactivation of H + ATPase on rice tonoplast.It shows that the chemicals that can cause the cold inactivation considerably usually cause the destruction of the order of tonoplast lipid first.The capability of inducing cold inactivation and changing the order of membrane lipid in cations,anions and chelation agents has been testified and compared.The result proved the conclusion above.We consider that the changing of membrane lipid in tonoplast plays an important role in cold inactivation and is one of the reasons of early cold pet of plants.

关 键 词：V型 H^+-ATPASE 冷失活 液泡膜 水稻 生化机制 

分 类 号：S426[农业科学—植物保护] S511.01