燕山山脉不同居群豆茶决明叶片特征与光合特性  

On Photosynthetic Physiological Characteristics of Different Cassia nomame Populations in Yanshan Mountain

作　　者：常旭[1] 魏贤星 陈健 许艳梅 杜一鸣[3] 徐兴友 

机构地区：[1]河北科技师范学院生命科技学院,河北秦皇岛066600 [2]河北省青龙满族自治县农牧局 [3]北京林业大学园林学院

出　　处：《河北科技师范学院学报》2016年第4期46-51,60,共7页Journal of Hebei Normal University of Science & Technology

基　　金：河北省研究生创新资助项目

摘　　要：以燕山山脉5个居群豆茶决明为研究材料,系统比较了同一生境条件下各居群的叶片特征和光合特性。结果表明:承德兴隆居群叶形态参数值最大,而唐山迁西居群叶形态参数值最小。各居群不同生长时期叶绿素含量都呈逐渐下降趋势,植株处于营养生长期的叶绿素含量达到最大值,结荚期各居群叶绿素含量最低。豆茶决明的净光合速率日变化呈双峰曲线,都是先升高后降低,再升高,最后再降低,中间有明显的午休现象;各居群日平均净光合速率由高到低顺序为秦皇岛青龙居群,承德宽城居群,唐山遵化居群,承德兴隆居群,唐山迁西居群。豆茶决明各居群的蒸腾速率曲线变化及气孔导度变化与净光合速率曲线变化趋势相一致,而胞间CO_2摩尔分数日变化趋势与净光合速率变化趋势相反。Five Cassia nomame populations in Yanshan mountain were used to study the differences of leaf morphology and photosynthetic physiological characteristics. The results showed that the maximum leaf morphological parameters belonged to Chengdexinglong population, and the minimum to Tangshanqianxi population. The chlorophyll contents of all populations displayed a gradual downward trend, while the total chlorophyll contents might reach the peak in the vegetative stage and in contrast might reach the bottom in the pod stage. The diurnal variation of the net photosynthetic rate of Cassia norname exhibited a double-peak curve, i.e. increased first and then reduced and increased again and reduced. The midday depression in diurnal variation was obviously observed. The daily average net photosynthetic rate of different Cassia nomame populations ranged from Qinhuangdaoqinglong population, Chengdekuancheng population, Tangshanzunhua population, Chengdexinglong population to Tangshanqianxi population. The diurnal variation of transpiration rate and stomatal trans- mitting degree approached with the diurnal variation of net photosynthetic rate but the diurnal variation of intercellular CO2 concentration tended to be opposite.

关 键 词：豆茶决明 居群 光合生理特性 燕山地区 

分 类 号：S567.219[农业科学—中草药栽培]