Changes of photosynthetic characteristics in relation to leaf senescence in two maize hybrids with different senescent appearance
文献类型: 外文期刊
第一作者: He, P
作者: He, P;Osaki, M;Takebe, M;Shinano, T
作者机构:
关键词: Chlorophyll content;Nitrogen content;Phosphoenolpyruvate carboxylase;Ribulose-1;5-bisphosphate carboxylase oxygenase;Life-span;Phosphoenolpyruvate carboxylase;Nitrogen application;Plant-growth;Stay-green;Leaves;Translocation;Accumulation;Chlorophyll
期刊名称:PHOTOSYNTHETICA ( 影响因子:3.189; 五年影响因子:3.38 )
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收录情况: SCI
摘要: A field experiment was conducted to investigate the changes in chlorophyll (Chl) and nitrogen (N) contents, ribulose1,5-bisphosphate carboxylase/oxygenase (RuBPCO) and phosphoenolpyruvate carboxylase (PEPC) contents and PEPC activity, and the photon-saturated net photosynthetic rate (P-Nsat), and their relationships with leaf senescence in two maize hybrids with different senescent appearance. One stay-green (cv. P3845) and one earlier senescent (cv. Hokkou 55) hybrid were used in this study, and we found that Chl and N contents and the P-Nsat in individual leaves of P3845 were greater than those in corresponding leaves of Hokkou 55 at the successive growth stages. In addition, larger contents of RuBPCO and PEPC, and a greater activity of PEPC were observed in P3845. Due to the lower rates of decrease of Chl, RuBPCO, and PEPC amounts per unit of N, and the lower net C translocation rate per unit of N in the stay-green hybrid, leaf senescence was delayed in comparison to the earlier senescent hybrid.
分类号: Q94
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