摘要
为了解2个南瓜品种的光合生理生态特征与差异,对苗期的光合指标进行了测定,并对净光合速率与其影响因子的相关性进行了分析。结果表明:南瓜旋复和南瓜蜜本的净光合速率、光合有效辐射、气孔导度和蒸腾速率均呈单峰型变化,旋复和蜜本的胞间CO2浓度均呈U形变化,叶温均呈倒U型变化。偏相关分析和通径分析表明:对旋复净光合速率影响的主要因子及其影响顺序为光合有效辐射>气孔导度>胞间CO2浓度,表明对净光合速率起直接主要作用的因子是光合有效辐射;对南瓜蜜本净光合速率影响的主要因子及其影响顺序为胞间CO2浓度>光合有效辐射>叶温>气孔导度,表明对净光合速率起直接主要作用的是胞间CO2浓度和光合有效辐射。
The photosynthetic indexes of two pumpkin varieties were determined at seedling stage and the correlation between net photosynthetic rate and other influence factors was analyzed to study their photosynthetic physiological characteristics and difference between two pumpkin varieties.The results showed that the net photosynthetic rate,photosynthetic effective radiation,stomatal conductance and transpiration rate of 2 pumpkin varieties presented a single-peak curve,their intercellular CO2 concentration presented a U curve and their leaf temperature presented a reversed U curve.The partial correlation and path analysis showed that the factors influencing net photosynthetic rate of Xuanfu pumpkin variety was photosynthetic effective radiation stomatal conductanceintercellular CO2 concentration,and the factors influencing net photosynthetic rate of Miben pumpkin variety was intercellular CO2 concentration photosynthetic effective radiationleaf temperaturestomatal conductance.
出处
《贵州农业科学》
CAS
北大核心
2011年第1期87-89,95,共4页
Guizhou Agricultural Sciences
基金
河南省科技成果转化资金项目(092201610006)
河南省科技攻关重点项目(072102120006)
关键词
南瓜
品种
净光合速率
影响因子
相关性
pumpkin
variety
net photosynthetic rate
influence factor
correlation
