光对小麦幼叶脂氧合酶活性及膜脂过氧化作用的影响  

EFFECT OF LIGHT ON THE LOX ACTIVITY AND LIPID PEROXIDATION IN YOUNG WHEAT LEAVES

作　　者：张荣平[1] 王振镒[1] 薛刚[1] 高俊凤[1] 

机构地区：[1]西北农业大学植物生理研究室

出　　处：《西北植物学报》1994年第3期198-202,共5页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家自然科学基金;农业部"八五"应用基础研究课题

摘　　要：选用抗旱型小麦品种陕合６号和水分敏感型小麦品种郑引１号的黄化幼苗为材料，研究了光处理对小麦幼叶脂氧合酶活性和膜脂过氧化作用的影响。结果表明：光处理后黄叶变绿，叶片中的ＬＯＸ活性降低，丙二醛含量和叶绿素含量增加，膜透性升高，ＩＵＦＡ升高。ＬＯＸ活性与光抑制过程的恢复，光保护过程及膜脂过氧化作用有关。光诱导产生的膜脂过氧化作用是一种“准膜脂过氧化作用”。Light was used to treat the etiolated younng wheat seedlings. The results showed that afterthe treatment of Light,the etiolated leaf turned to green,the LOX activity in it decreased dramat-ically,meamwhile,the MDA content. chlorophyll content and the membrane permeability in-creased. The fatty acid composition also changed,ie. with the decrease of ralative content of satu-rated fatty acid(especially C_(16:0)),the unsaturated fatty acid(especially the C_(18:3))and IUFA in-creased.The LOX activity was closely related to the recovery from photo inhibition,photo protec-tion and Lipid peroxidation in young wheat leaves. The lipid peroxidation induced by light was aquasi-Lipib peroxidation which differ from the lipid peroxidation usurally mentioned.

关 键 词：光 膜脂过氧化 脂氧合酶 小麦 

分 类 号：S512.101[农业科学—作物学]