论文部分内容阅读
应用叶绿素荧光诱导动力学方法,分析玉米幼苗展叶过程中叶尖、叶中和叶基部位的叶绿素荧光参数特性,研究C4植物在叶片发育过程中光化学活性的变化规律。结果表明,对于叶尖部位,在叶片从2 cm伸展到30 cm过程中,Fo以5%的幅度逐渐下降;Fv/Fo和Fv/Fm分别从2.59和0.76逐渐升高到3.92和0.82,而在叶长2 cm时Fv最低,ABS/RC、TRo/RC、ETo/RC和DIo/RC最高。30 cm长的叶片从叶基到叶尖相应的荧光参数变化特性与展叶过程中的叶尖部位一致。这些结果说明在玉米叶片展开过程中从叶基到叶尖光化学活性逐渐完善。
The chlorophyll fluorescence parameters of leaf tip, leaf and leaf were determined by chlorophyll fluorescence-induced kinetics. The changes of photochemical activity of C4 plants during leaf development were analyzed. The results showed that for the leaf tip, Fo gradually decreased by 5% during the extension from 2 cm to 30 cm; the Fv / Fo and Fv / Fm increased from 2.59 and 0.76 to 3.92 and 0.82, respectively The Fv was the lowest at 2 cm leaf length with the highest ABS / RC, TRo / RC, ETo / RC and DIo / RC. The corresponding variation of fluorescence parameters from the leaf base to the leaf tip of the 30 cm long leaves was consistent with that of the leaf tip during leaf unfolding. These results indicate that the photochemical activity from leaf base to tip is gradually improved in the process of corn leaf expansion.