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题名: PHOTOSYNTHETIC ACCLIMATION ABILITY OF CHLORELLA VULGARIS TO LOW TEMPERATURE TREATMENT ILLUSTRATED BY CHLOROPHYLL FLUORESCENCE
作者: Huang, Wenmin1, 2; Hu, Zhengyu1; Bi, Yonghong1
关键词: Low temperature ; Chlorella vulgaris ; Photosynthetic activity ; Acclimation ; Chlorophyll fluorescence
刊名: FRESENIUS ENVIRONMENTAL BULLETIN
发表日期: 2017
卷: 26, 期:1A, 页:695-703
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: The structural and functional alterations of photosynthetic apparatus of green algae Chlorella vulgaris grown at low temperature (10 degrees C) were investigated by chlorophyll (Chl) fluorescence. The results showed that 7 d of low temperature exposure didn't lead to a reduction of growth rate. The photosynthetic rate was stimulated under low temperature condition. F-v/F-m and MDA content showed no significant difference between 10 degrees C-and 25 degrees C-grown Chlorella cells. Cells grown at 10 degrees C had a significantly lower Chl a content, which would act to reduce the probability of light absorption. Measurements of electron transport rates [ETR(II)] and quantum yield of PSII [Y(II)] indicated that the cells grown at 10 degrees C maintained higher rates of electron transport of PSII than cells grown at 25 degrees C. Results from fast chlorophyll fluorescence transients further confirmed a very high potential of electron transport activity of PSII at 10 degrees C. Furthermore, non photochemical quenching (NPQ) was stimulated at 10 degrees C and the activation of NPQ played an important role in protecting PSII from stress of low temperature. Y(I) and ETR(I) did not showed no significant difference between low temperature and the control. Ultrastructure of chloroplast was not injured by low temperature, on the contrary, at low temperature more starch granules stored in chloroplasts, which might be used for supplying energy for maintenance of the cold acclimated state. All these results suggested that the Chlorella cells possess an ample acclimation ability to low temperature.
关键词[WOS]: PHOTOSYSTEM-II ; MARINE-PHYTOPLANKTON ; GENE-EXPRESSION ; STRESS ; PHOTOINHIBITION ; APPARATUS ; PLANTS ; LIGHT ; ADAPTATION ; COLD
语种: 英语
项目资助者: National Key Research and Development Program of China(2016YFA0601000) ; National Natural Science Foundation of China(31100340)
WOS记录号: WOS:000395724300017
ISSN号: 1018-4619
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/28958
Appears in Collections:藻类生物学及应用研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Peoples R China
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