作　　者： ; ; ;

机构地区： 华南师范大学生命科学学院

出　　处： 《园艺学报》 2005年第6期1061-1064,共4页

摘　　要： 对美丽异木棉光合特性进行了研究.结果表明:美丽异木棉的光饱和点和补偿点分别约为1 600和35 μmol·m-2·s-1,表观量子效率为0.0263; CO2饱和点和补偿点分别约为1 000和59 μmol·mol-1,羧化效率为0.0622;光合适温为24～28℃;晴天的净光合速率日变化为双峰曲线,次峰明显低于首峰;Pn季节变化也为双峰曲线;Pn与气孔导度呈显著正相关,与蒸腾速率、光照强度呈正相关,与胞间CO2浓度呈显著负相关,但与温度的相关性不明显. The photosynthetic characteristics of leaves in Chorisia speciosa were studied. The results were as follow： The light saturated point and compensate point of leaves of Chorisia speciosa were about 1 600 and 35 μmol · m^-2 · s^-1 respectively, while the apparent quantum efficiency was 0. 0263; The CO2 saturated point and compensate point were about 1 000 and 59 μmol · mol ^-1 respectively, while the carboxying efficiency was 0. 0622; The optimal temperature of photosynthesis ability was 24 -28℃ ; The diurnal variation of net photosynthetic rate of leaves in sunny days exhibited bimodal curve, with a lower value of the second peak than that of the first peak, whereas, a bimodal curve of the seasonal variation of Pn was observed; Pn had a significantly positive relationship with stomata conductance and a positive relationship with transpiration rate and photosynthetic active radiation, but a obvious negative relationship with intercellular CO2 concentration. The relationship between Pn and air temperature was indefinite.

关 键 词： 美丽异木棉 光合持件 生理生态因子 相关性

领　　域： [农业科学] [农业科学]