热带作物学报2017，Vol.38Issue(3)：408-414,7.DOI:10.3969/j.issn.1000-2561.2017.03.004
蝴蝶兰与萼脊兰光合特性的比较
Comparative Study of Photosynthetic and Chlorophyll Fluorescence Characteristics of Phalaenopsis and Sedirea japonica
摘要
Abstract
The net CO2 uptake,titratable acidity contents and chlorophyll fluorescence characteristics of Phalaenopsis and Sedirea japonica were comparatively studied.The results showed that both orchid of Phalaenopsis and S.japonica were CAM orchid with the net CO2 uptake rate reached the maximum at 22:00 and 0:00,respectively.The results of chlorophyll fluorescence from dark-adapted state showed that minimal fluorescence (F o),maximal fluorescence (Fm),maximum variable fluorescence (Fv),maximum quantum efficiency of PSⅡ photochemistry (Fv/Fm) and potential photochemical efficiency of PS Ⅱ (Fv/Fo) of Phalaenopsis was higher than those of S.japonica.The measurement of the daily chlorophyll fluorescence parameters with sunlight as the photochemical light indicated that the suitable light intensity in Phalaenopsis was lower than that in S.japonica,and strong light might cause the photo-inhibition of photosynthesis,which reduce the photochemistry efficiency.Generally speaking,Phalaenopsis was a CAM orchid and S.japonica a facultative CAM orchid.The cultivation of cross offspring from Phalaenopsis and S.japonica should provide suitable light intensity to prevent photo-inhibition of photosynthesis,and the special conditions could increase the C3-type photosynthesis by decreasing CAM-type photosynthesis,which might promote the growth through accelerating the dry material accumulation.关键词
蝴蝶兰/萼脊兰/光合途径/叶绿素荧光Key words
Phalaenopsis/Sedirea japonica/photosynthetic pathway/chlorophyll fluorescence分类
农业科技引用本文复制引用
许申平,梁芳,蒋素华,张燕,王默霏,崔波..蝴蝶兰与萼脊兰光合特性的比较[J].热带作物学报,2017,38(3):408-414,7.基金项目
河南省科技计划项目(No.162102110073、152107000071). （No.162102110073、152107000071）
