叶黄素循环酶  

The enzyme of the Xanthophyll cycle

作　　者：阳成伟[1] 陈贻竹[1] 

机构地区：[1]中国科学院华南植物研究所,广东广州510650

出　　处：《广西植物》2002年第3期264-267,共4页Guihaia

基　　金：国家重点基础研究规划项目 (G19980 10 10 0 )资助

摘　　要：依赖叶黄素循环的热耗散是一种主要防御光破坏的机制。参与叶黄素循环的酶是紫黄质脱环氧化酶和玉米黄质环氧化酶 ,紫黄质脱环氧化酶已分离纯化 ,其 c DNA已被克隆 ,其活性主要受跨类囊体膜的 p H梯度和抗坏血酸浓度的调节 ;玉米黄质环氧化酶还没有被分离出来 ,但其 c DNA也已被克隆 ;其活性主要与NADPH的浓度、O2 及光等有关。Xanthophyll cycle is concerned with their possible role in radiationless energy dissipation of excess light energy; Violaxanthin deepoxidase and zeaxanthin epoxidase are involved in xanthophyll cycle metabolism and the cDNA of Violaxanthin deepoxidase has cloned , its activity is mainly regulated by pH value and ascorbate concentration. The cDNA of zeaxanthin epoxidase has also cloned,its activity is related with NADPH concentration, pH value, O 2 and light et al .

关 键 词：叶黄素循环酶 紫黄质脱环氧化酶 NADPH 光破坏 

分 类 号：Q946.5[生物学—植物学]