珍稀濒危蕨类植物原始观音座莲的光合生理生态特性研究  

Study on the Photosynthetic and Ecophysiological Characteristics of Endangered Pteridophytes Archangiopteris henryi

作　　者：张光飞[1] 翟书华[2] 苏文华[1] 

机构地区：[1]云南大学生态学与地植物学研究所,云南昆明650091 [2]昆明学院生物系,云南昆明650031

出　　处：《安徽农业科学》2009年第30期14682-14683,14692,共3页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金(30760043);教育部高等理工教育教学改革与实践项目(239)

摘　　要：利用CO2光合测定仪分析了引种栽培的原始观音座莲叶片的光合补偿点和饱和光强,通过控制叶室的光合有效辐射、CO2浓度、温度和相对湿度,分析了叶片的羧化效率和CO2补偿点,并进行光合有效辐射、温度和相对湿度对光合速率的影响研究。结果表明,原始观音座莲叶片的光合补偿点为5.3μmol/(m2.s),饱和光强为500μmol/(m2.s),有明显的光抑制现象;叶片的羧化效率为0.0092,CO2补偿点为51.8μmol/mol;光合速率在叶温10～20℃内随温度升高上升,20～35℃随温度升高下降,最适温度为16～31℃;相对湿度20%～80%内,叶片光合速率随湿度增加而增大,最适相对湿度条件在80%以上。With CO2 photosynthetic analyzer, light compensation point and saturation light intensity for the ptcridophyte Archangiopteris henryi grown in greenhouse were studied. By controlling light intensity, CO2 concentration, temperature and humidity in the leaf chamber, carboxylation efficiency and CO2 compensation point were analyzed and laboratory studies were conducted to investigate the relations between photosynthetic rate and light intensity, temperature and humidity. The results showed that the compensation irradianee was 5.3 μmol/（ m^2·s）. Saturation light intensity was about 500 μmol/（ m^2· s）. Archangiopteris henryi with obvious phenomenon of photoinhibifion. Carhoxylation efficiency of leaves was about 0.009：2 and CO2 compensation point was 51.8 μmol/mol. The photosynthetic rate was at the leaf temperature 10 - 20 ℃, raised with the temperature increased, when 20 -35 ℃, reduced with the temperature decreased, the optimal temperature was from 16 to 31 ℃. When humidity went up from 20% to 80% , the rate of net photosynthesis increased. The optimum condition for the relative humidity was above 80%.

关 键 词：原始观音座莲 光合特性 光 温度 湿度 CO2浓度 

分 类 号：O945.79[理学]