不同泡桐无性系光合特征参数差异分析

The variance analysis of photosynthetic characteristic parameters of different Paulownia Clones

以1 a生1B、2B、3B、9501共4种泡桐优良无性系为材料,采用LCPRO+便携式光合测定系统,对其光合日均值和光合-光响应曲线进行测定研究。结果表明,1)4种泡桐无性系光合特征日均值差异显著,净光合速率日均值大小依次为9501>1B>3B>2B;2)4种泡桐无性系随光强变化的特性参数各不相同,综合各光合特征参数分析4种泡桐无性系光合速率随光强变化的大小依次为1B>9501>3B>2B;3)泡桐无性系1B不仅在弱光下光合能力强,在适中光强和高光强下,同样可以进行良好的光合作用;4)表观量子效率最大的泡桐无性系1B能高效的将光能转换为所需的化学能。

The photosynthetic characteristic parameters and daily average photosynthetic and photosynthetic-light response curve of 4 kinds of 1-year-old excellent Paulownia clones,1B,2B,3B,and 9501,were determined by using LCPRO ＋ portable photosynthesis determination system. The results showed that： 1） The 4 kinds of Paulownia clones had obvious differences in photosynthesis characteristic parameters,the daily average of the net photosynthetic rate in order is： 9501 1B 3B 2B; 2） The characteristic parameters of 4 kinds of Paulownia clones all come differently under different light intensities,taking all photosynthetic parameters to analyze,the photosynthetic rate order of 4 kinds of Paulownia clones with the light intensity changes was 1B 9501 3B 2B; 3） The Paulownia clone 1B had strong photosynthetic ability not only under low light,but also under moderate intensity and high intensity; 4） The Paulownia clone 1B with the maximum apparent quantum yield could efficiently convert the light energy to the necessary chemical energy.