论文部分内容阅读
本文用玉米杂交种中单１４号及其两亲本的苗期叶片，进行了叶片叶绿素荧光动力学测定．结果表明，与两亲本相比，玉米杂交种叶绿体类囊体膜的光系统Ⅱ还原侧有较大的ＰＱ电荷库，可以加快两个光系统间的非循环电子传递速率．杂交种光系统Ⅱ活性较强，光能转化效率较高，同时，还具有较大的光合单位．这些均有利于光能吸收和提高光能转化效率及光合作用速率。ＤＣＩＰ光还原活力测定结果支持了上述分析．
The chlorophyll fluorescence kinetics of leaves of Zhongdan No.14 and its parents was studied in this paper. The results showed that compared with the parents, the chloroplast thylakoid membranes of maize hybrids had larger PQ charge banks on the reducing side of photosystem Ⅱ, which accelerated the acyclic electron transfer rate between the two photosystems. The photosystem Ⅱ activity of hybrid was stronger, and the light energy conversion efficiency was higher, meanwhile, it also had larger photosynthetic unit. These are conducive to light energy absorption and improve light energy conversion efficiency and photosynthesis rate. DCIP photoreduction activity measurement results support the above analysis.