温州蜜柑(Citrus unshiu Mare.)叶片光合效率的日变化
关键词： 光合效率; 表观量子产量; 光呼吸; 光合日变化; 温州蜜柑
Diurnal variation in photosynthetic efficiency of leaves in satsuma mandarin
Chen Zhihui, Zhang Liangcheng
Zhejiang Agricultural University. Hangzhou,Zhejiang
Daily variation in quantum efficiency was dependent on leaf temperature at which the CO_(2)uptake was measured. #PHI#_(i)decreased with increase in leaf temperature and remained unchanged throughout the day if measured at similar leaf temperature. The negative effect of temperature increase on photosynthetic efficiency was attenuated or even eliminated by lowering the O_(2)concentration in the air. Quantitative measurements of the enhancement of photosynthesis by 2% O_(2) at different temperatures of different times of the day seem to indicate that it is the increase in rate of photorespiration relative to rate of photosynthesis rather than a light-induced damage to and inhibition of reactions in photosynthetic apparatus that leads to the decrease in efficiency in midday.
Key words: Phytosynthetic effidency;Apparent quantum yield;Phototespiration;Diurnal variation;Citrus unshin Mare
陈志辉, 张良诚. 温州蜜柑(Citrus unshiu Mare.)叶片光合效率的日变化[J]. 生理学报 1994; 46 (3): .
Chen Zhihui, Zhang Liangcheng. Diurnal variation in photosynthetic efficiency of leaves in satsuma mandarin. Acta Physiol Sin 1994; 46 (3): (in Chinese with English abstract).