竹节树无性系叶片生长特性与叶绿素荧光

Analysis on Leaf Growth Characteristics and Chlorophyll Fluorescence of Carallia brachiata Clones

对优选的6个竹节树(Carallia brachiata)无性系叶片性状(叶片干质量、叶面积、比叶重)、叶绿素相对含量和叶绿素荧光参数进行测定,并作单因素方差分析和聚类分析。结果表明:竹节树不同无性系叶片的干质量和叶面积差异不显著,叶绿素相对含量具有显著的差异性,不同无性系具有不同的光能吸收和利用能力;不同的无性系其叶绿素荧光的部分参数(Fo、Fv/Fm、Fv/Fo、ФPSⅡ、ETR)差异显著;竹节树无性系C-15植株与其他无性系相比具有较高水平的实际光化学效率(ΦPSⅡ)值,而非化学猝灭系数(q N)较低,同时具有较高的表观电子传递速率(ETR),表明竹节树无性系C-15有较高的光呼吸;相关分析表明,叶片生长较好的无性系其叶绿素相对含量较高,同时也具有较高的PSⅡ光化学效率;无性系C-15号具有较高的叶绿素相对含量及较强的光化学特性,可进行大力推广研发。

In this paper, the leaf traits（including the leaf dry weight, leaf area, and specific leaf weight）, chlorophyll relative content and chlorophyll fluorescence parameters of the six superior Carallia brachiata clones were determined and analyzed. And the one-way ANOVA and cluster analysis was carried out. The results showed that there were no significant differences in leaf dry weight and leaf area between leaves of different clones, and the relative contents of chlorophyll were the significant difference. Different clones had different ability of light energy absorption and utilization. Some parameters（Fo, Fv/Fm, Fv/Fo, ФPSⅡ, ETR） of chlorophyll fluorescence among different clones were significantly different. The NO. C-15 clone had a higher level of the photochemical efficiency value（ΦPSⅡ） than the other clones, while the non-chemical quenching coefficient（q N） was relatively low, and had a high electron transport rate（ETR）. The correlation analysis showed that the chlorophyll content of the clones with better leaf growth was higher, and that of the clones had the higher PSⅡ photosynthetic efficiency. The NO. C-15 clone had higher relative chlorophyll content and stronger photochemical properties, which could be vigorously promoted to the future research and development.