摘要
用叶黄素循环抑制剂二硫苏糖醇(DTT)处理7h的柑橘离体叶片,其非光化学猝灭系数NPQ大幅度下降;在中等强度光(500μmol·m-2·s-1)和高强度光(1500μmol·m-2·s-1)下,DTT处理的叶片光化学效率(Fv/Fm)分别下降3.8%和39.7%,光合电子传递速率(ETR)分别下降12%和49.5%,D1蛋白含量也分别下降87%和92.3%;黑暗对DTT处理叶片的各种荧光参数和D1蛋白的影响不大。显示叶黄素循环在保护光系统(PS)Ⅱ反应中心、抵御光抑制中有一定的积极效应,可能影响了D1蛋白周转。
In this study, NPQ （non-photochemical quenching coefficient） in leaves of Citrus reticulate Blanco. declined significantly after seven hours with DTT （dithiothreitol） treatment. After DTT treatment, under moderate light of 500 μmol·m^-2·s^-1, Fv/Fm （photochemical efficiency）, ETR （electron transport rate）, and the content of D1 protein in leaves of C. reticulate decreased by 3.8%, 12%, and 87%, respectively. Under high light of 1 500 μmol·m^-2·s^-1, the corresponding parameters decreased by 39.7%, 49.5%, and 92.3%, respectively. In the dark, DTT treatment did not have significant effect on the chlorophyll fluorescence parameters and the level of the D1 protein. This result indicated that xanthophyll cycle played role in protecting PSII against photoinhibition and might have effect on the D 1 protein turnover.
出处
《植物生理学通讯》
CSCD
北大核心
2010年第1期42-46,共5页
Plant Physiology Communications
基金
国家自然科学基金(30771497)
关键词
柑橘
叶黄素循环
光系统II
叶绿素荧光
D1蛋白
保护效应
Citrus reticulate Blanco.
xanthophyll cycle
PSII
chlorophyll fluorescence
D1 protein
protective effect
