窄叶短柱茶光合特性研究  

Study on Photosynthetic Characteristics of Camellia fluviatilis

作　　者：杨亚慧[1] 黄永芳[1] 

机构地区：[1]华南农业大学林学院,广东广州510642

出　　处：《亚热带植物科学》2014年第4期281-285,共5页Subtropical Plant Science

基　　金：广州市科技支撑计划项目(2011J4300093)

摘　　要：用LI-6400型便携式光合作用测定系统对窄叶短柱茶Camellia fluviatilis的光合特性进行研究。结果表明:窄叶短柱茶净光合速率日变化呈单峰型曲线,峰值出现在13:00左右,为18.65μmol·m-2·s-1;通过光响应曲线拟合得知,其光补偿点为12μmol·m-2·s-1,光饱和点为500μmol·m-2·s-1。相关性分析表明,窄叶短柱茶净光合速率与光强、大气温度具有极显著正相关性(P≤0.01),相关系数分别为0.715和0.939;与胞间CO2浓度存在极显著负相关(P≤0.01),相关系数为-0.752;与大气CO2浓度存在显著负相关性(P≤0.05),相关系数为-0.605。The photosynthetic characteristics of Camellia fluviatilis were studied by LI-6400（Li-Cor Inc, USA） portable photosynthesis system. The results showed that the curves of diurnal variation in Pn（net photosynthetic rate） had a peak at about 13：00 pm, and reached to 18.65 μmol·m^-2·s^-1; light compensation point of photosynthesis of C. fluviatilis in un-folding leaves was 12 μmol·m^-2·s^-1, light saturation point of photosynthesis was 500 μmol·m^-2·s^-1. The correlation analysis showed that：（1） The Pn of C. fluviatilis had extremely significant positive correlation（P≤0.01） with light intensity and air temperature, the correlation coefficients were 0.715 and 0.939 respectively;（2） There was significant negative correlation between Pn of C. fluviatilis and intercellular CO2 concentration（P≤0.01）, the correlation coefficient was-0.752;（3） The Pn of C. fluviatilis also had a negative correlation with the atmosphere CO2 concentration（P ≤ 0.05）, correlation coefficient of which was-0.605.

关 键 词：窄叶短柱茶 光合特性 日变化 环境因子 

分 类 号：Q945.11[生物学—植物学]