射干叶绿素荧光参数的夏季日变化  

Diurnal variation of chlorophyll fluorescence parameters in Belamcanda chinensis in summer

作　　者：杨肖华[1] 郭圣茂[1] 姚春娟[1] 商靓婷 Yang Xiaohua Guo Shengmao Yao Chunjuan Shang Liangting(College of Landscape and Art, Jiangxi Agricultural University, Nanchang Jiangxi 330045, Chin)

机构地区：[1]江西农业大学园林与艺术学院,江西南昌330045

出　　处：《南方林业科学》2017年第3期16-18,共3页South China Forestry Science

摘　　要：以1年生的射干Belamcanda chinensis为实验材料,用PAM-2500型叶绿素荧光仪对射干夏季1 d的叶绿素荧光参数进行测定。结果表明:初始荧光(FO)、最大荧光(FM)、PSⅡ原初光能转化效率(FV/FM)、表现光合电子传递速率ETR均存在显著的日变化(P<0.05)。其中FO、FM和FV/FM这3项参数变化趋势均一致,都呈先下降又上升的趋势,均在14:00降至最小值,而ETR则呈先上升后下降又小幅上升再急剧下降的趋势,在18:00时,ETR的数值达到最小。1 year old Belamcanda chinensis was used as experimental material, the chlorophyll fluorescence parameters were measured by PAM-2500 chlorophyll fluorescence spectrometer in summer for 1 day. The results showed that there were significant diurnal changes（P 0.05） in the initial fluorescence（FO）, maximum fluorescence（FM）, primary light energy conversion efficiency（FV/FM） and photosynthetic electron transport rate（ETR）. The trend of FO, FM and FV/FM were the same as that of FO, FM and FV/FM. They all decreased at first and then decreased at 14：00, while ETR increased first, then decreased and then decreased sharply. Of the trend, at 18：00, ETR values to a minimum.

关 键 词：射干 夏季 叶绿素荧光 日变化 

分 类 号：S567.29[农业科学—中草药栽培]