建兰叶艺品种光合色素含量及叶绿素荧光特性分析

以建兰栽培品种‘八宝奇珍’Cymbidium ensifolium ‘Ba Bao Qi Zhen’为材料,对其正常绿色叶片及黄化变异叶片的光合色素含量、叶绿素荧光参数进行比较。结果表明,‘八宝奇珍’黄化变异叶片的叶绿素总量、叶绿素a 和叶绿素b 含量均显著低于正常绿色叶片,且随着黄化面积的增大呈现递减趋势;黄化变异叶片的初始荧光量(Fo)、最大荧光产量(Fm)、Kautsky 诱导效应最大荧光(Fp)、稳态光适应光化学淬灭系数(qP)以及光适应稳态荧光产量(Ft_Lss)均显著低于正常绿色叶片;PSⅡ原初光能转化效率(Fv/Fm)与正常绿色叶片无明显差异;稳态非光化学荧光淬灭系数(NPQ)高于正常绿色叶片。

Photosynthetic Pigments Content and Chlorophyll Fluorescence Kinetics Parameters of a Leaf Mutant Cultivar of Cymbidium ensifolium

In this study, the content of photosynthetic pigments and chlorophyll fluorescence kinetics parameters of normal green leaves and yellow mutation leaves of Cymbidium ensifolium ‘Ba Bao Qi Zhen’ were compared. Results showed that the content of chlorophyll (Chl), chlorophyll a (Chl a) and chlorophyll b (Chl b) of yellow mutation leaves were significantly lower than those of the normal green leaves, and the contents showing a gradual decline with the increase of mutant area. Furthermore, it was found that the initial fluorescence (Fo), maximum fluorescence yield (Fm), Kautsky effect maximum fluorescence (Fp), the steady state photochemical quenching coefficient (qP) and light adaptation steady-state fluorescence yield (Ft_Lss) of yellow mutation leaves were significantly lower than those of the normal green leaves, while there was no significant difference in PSⅡ original light energy conversion efficiency (Fv/Fm). In addition, the steady state of photochemical fluorescence quenching coefficient (NPQ) of yellow mutation leaves was higher than that of the normal green leaves.