摘要
叶片叶绿素荧光动力学参数证明,与两亲相比,玉米杂交种叶绿体类囊体膜的PSⅡ还原侧有较大的PQ电荷库(CA/F(?)),可以加快两个光系统间的非循环电子传递速率,有利于光合膜的能态化(△F_y/F_(?)和△F_y/T),调节有效的光合磷酸化。同时.杂交种具有较大的光合单位(T_(12))。这些都有利于光能吸收和提高光能转化效率及光合作用速率。整体叶片光合强度的测定结果支持了上述分析。
The parameters of chlorophyll fluorescence induction kinetics of hybrid leaves, proved large PQ pool (CA/F0 ) on the reduction side of PS Ⅱ in hybrid maize than in its parents and higher quenching rate of variable fluorescence (△FV/F0 and △FV/T) as compared with its parents, which were related to the photosynthetic electron transport and protion gradient in thy-lakoid membrane. Besides, hybrid maize possessed large photosynthetic unit (T1/2). All these characters were of benefit to raising the efficiency of light energy conversion and rate of photosynthesis. The photosynthesis rate examined with intact leaves was in accordance with analysed above.
出处
《作物学报》
CAS
CSCD
北大核心
1996年第5期560-564,共5页
Acta Agronomica Sinica
关键词
光合作用
荧光动力学
电子传递
光合强度
玉米
Photosynthesis
Chlorophyll fluorescence induction kinetics
Electron trans-port
Photosynthesis rate
