摘要
Kok效应是植物在其光补偿点附近光合作用对光强的响应有一个较大的改变。应用植物光响应修正模型研究温度为30℃、CO2浓度分别为300和400μmol.mol-1时水稻在光补偿点附近量子效率的改变情况以及Kok效应。结果表明:水稻叶片的量子效率在光补偿点附近不是常数,且与暗呼吸速率无关,但与光呼吸有关。认为水稻叶片在光补偿点附近量子效率的改变来自其净光合速率对光强的非线性响应和它的光呼吸作用。
The linear response of photosynthesis to light at low photon flux densities is known to change largely in the vicinity of the light compensation point so that the quantum yield seems to decrease as radiation increases.This change was termed Kok effect.The relationship between the quantum yield and light intensity was discussed in detail in this paper based on a modified model of light-response curve of photosynthesis for rice at 300 and 400 μmol·mol-1.The change of quantum yield in the vicinity of the light...
出处
《扬州大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2009年第3期5-10,共6页
Journal of Yangzhou University：Agricultural and Life Science Edition
基金
国家自然科学基金资助项目(30871485)
江西省科技厅农业攻关项目(吉市科技字[2006]21号)
关键词
水稻
光补偿点
光合量子效率
Kok效应
rice
light compensation point
photosyn thetic quantum yield
Kok effect
