【摘要】 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。更多还原

【Abstract】 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.更多还原