黄瓜叶片光合作用的温度补偿点与光合启动时间  

The Temperature Compensation Point and the Start Time of Photosynthesis of Cucumber Leaves

作　　者：张振贤[1] 艾希珍[2] 赵世杰[2] 杨红艳[2] 

机构地区：[1]中国农业大学蔬菜学系,北京100094 [2]山东农业大学园艺学院,泰安271018

出　　处：《园艺学报》2003年第2期157-162,共6页Acta Horticulturae Sinica

基　　金：国家自然科学基金重点项目 (39830 2 30 )

摘　　要：利用英国PPsystem公司生产的CIRAS 1型便携式光合仪并配置有关设备 ,在控温、控光条件下 ,对黄瓜叶片的光合起动时间、温度补偿点及其某些影响因素进行了测定。结果表明 ,黄瓜低温温度补偿点约为 3 3℃ ,高温温度补偿点为 48 9～ 5 0 7℃。日光温室品种新泰密刺的高温温度补偿点低于露地品种津研 4号。低温下老叶的温度补偿点明显高于新叶。黄瓜功能叶的光合作用的起动时间一般在 42～ 45min ,而老叶则相对较长 ,约 5 4～ 6 0min。Under controlling temperature and light intensity conditions,the temperature compensation point (TCP) and the start time of photosynthesis (STP) of cucumber leaves have been studied by using a CIRAS-1 portable photosynthetic instruments which manufactured by PP system company of England.The results showed that the TCP of cucumber leaves was 3.3℃ at low temperature(3-15℃ and 400 μmol·m -2·s -1PFD) and 48.9-50.7℃ at high temperature(40-48℃ and 1300 μmol·m -2·s -1PFD) respectively.The effect of low temperature on TCP in different cucumber varieties was small.TCP of cv.'Xintai mici',a solar greenhouse variety,was relatively lower at high temperature than that of the'Jinyan 4',an open-field variety.The TCP of cucumber of old leaf was higher than that of young leaf under low temperature.Generally,the start time of photosynthesis (namely,Pn from zero to maximum) in cucumber functional leaf was 42-45 min,but that in old leaf was 54-60 min.

关 键 词：黄瓜 叶片 光合作用 温度补偿点 光合启动时间 气孔导度 

分 类 号：S642.2[农业科学—蔬菜学]