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题名: Comparison of the photosynthetic characteristics of two developmental stages in Nostoc sphaeroides kutzing (Cyanophyta)
作者: Li Dun-hai (lidh@ihb.ac.cn) ; Chen Lan-zhou ; Li Gen-bao ; Wang Gao-hong ; Liu Yong-ding (liuyd@ihb.ab.cn)
通讯作者: Liu Yong-ding ; Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol and Biotechnol, Wuhan 430072, Peoples R China
刊名: Wuhan University Journal of Natural Sciences
发表日期: 2005
卷: 10, 期:5, 页:931-935
收录类别: 其他
英文摘要: The photosynthetic activities between two main developmental stages, colony and hormogonium, of the edible cyanobacterium Nostoc sphaeroides Kutzing, were compared. Hormogonia have a higher content of chlorophyll than that of colonies. It showed that the ratios of phycocyain (PC), allophycocyain (APC) and phycoerythrocyanin (PEC) in hormogonia and colonies were different. The room temperature chlorophyll fluorescence, 77 K chlorophyll fluorescence measurements of PS I and PS H activities all showed that colony has higher photosynthetic competence than hormogonia. Hormogonia had a higher respiration rate than colony, while their maximum photosynthetic oxygen evolution rates were very close. The responses of hormogonia and colonies to high light illuminations also were different. Both of their oxygen evolution rates decreased quickly with the prolonged high light illumination, but hormogonia can keep relatively higher PS II activity (F-v/F-m) than that of colonies. The results suggested that colony was photosynthetically more competent than hormogonia. while the ability of hormogonia to tolerate high light illumination was higher than that of colony.
ISSN号: 1007-1202
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/18483
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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Li Dun-hai (lidh@ihb.ac.cn) ; Chen Lan-zhou; Li Gen-bao; Wang Gao-hong; Liu Yong-ding (liuyd@ihb.ab.cn).Comparison of the photosynthetic characteristics of two developmental stages in Nostoc sphaeroides kutzing (Cyanophyta),Wuhan University Journal of Natural Sciences,2005,10(5):931-935
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