安徽农业大学学报2013，Vol.40Issue(2)：233-236,4.
交让木叶绿素荧光特性的研究
Chlorophyll fluorescence characteristics of Daphniphyllum macropodum
摘要
Abstract
The daily changes of chlorophyll fluorescence parameters of Daphniphyllum macropodum in different seasons were studied in this paper. The results indicated that the daily change range of every chlorophyll fluorescence parameter in spring and autumn was small. The values of Fo(minimal fluorescence)and NPQ (non-photochemical quenching)from 8:00 to 18:00 in summer presented a ascending-descending trend and the highest value was at 12:00 and 14:00 respectively, but the values of Fm(maximal fluorescence), Fm' (actual maximal fluorescence), Fv(variable fluorescence), Fv/Fm(optimal/maximal photochemical efficiency of PS Ⅱ), Fm/F0(electron transfer rate)and Fv/F0(potential activity of PS Ⅱ) from 8:00 to 18:00 in summer obviously showed a descending-ascending trends, and the lowest values were at 12: 00. The daily change of F0 in winter was small, but the values of Fm, Fm', Fv, Fv/Fm, Fm/F0 and Fv/Fo from 8:00 to 16:00 in winter, however, presented single peak and the highest value was between 12:00 and 14:00. The daily change trend of NPQ in winter, however, was contrary to those parameters mentioned above and the lowest value was between 12:00 and 14:00. The fact that the values of Fv/Fm, Fm/F0 and FvF0 in spring and autumn were obviously higher than those in summer and winter showed that the maximal photochemical efficiency, the electron transfer rate and the potential activity of PS Ⅱ in spring and autumn were more effective. On the contrary, the values of NPQ in winter and summer were obviously higher than those in spring and autumn, indicating that higher proportion of light energy absorbed in winter and summer was used to avoid the destruction of photosynthetic tissue through hot dissipation.关键词
交让木/叶绿素荧光参数/日变化/季节变化Key words
Daphniphyllum macropodum/ chlorophyll fluorescence/ daily change/ seasonal change分类
农业科技引用本文复制引用
陈晓娟,袁梦,胡婧楠,刘桂华..交让木叶绿素荧光特性的研究[J].安徽农业大学学报,2013,40(2):233-236,4.基金项目
国家"十二五"林业科技支撑项目(2011BAD38B0405)资助. （2011BAD38B0405）
