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Effects of heat stress on photosynthetic electron transport in a marine cyanobacterium Arthrospira sp.
Zhang, Litao1; Liu, Jianguo1,2
2016-04-01
发表期刊JOURNAL OF APPLIED PHYCOLOGY
卷号28期号:2页码:757-763
文章类型Article
摘要Arthrospira (Spirulina) is widely used as human health food and animal feed. In cultures grown outdoors in open ponds, Arthrospira cells are subjected to various environmental stresses, such as high temperature. A better understanding of the effects of high temperature on photosynthesis may help optimize the productivity of Arthrospira cultures. In this study, the effects of heat stress on photosynthetic rate, chlorophyll a fluorescence transients, and photosystem (PS) II, PSI activities in a marine cyanobacterium Arthrospira sp. were examined. Arthrospira cells grown at 25 A degrees C were treated for 30 min at 25 (control), 30, 34, 37, or 40 A degrees C in the dark. Heat stress (30-37 A degrees C) enhanced net photosynthetic O-2 evolution rate. Heat stress caused over-reduction PSII acceptor side, damage of donor side of PSII, decrease in the energetic connectivity of PSII units, and decrease in the performance of PSII. When the temperature changed from 25 to 37 A degrees C, PSII activity decreased, while PSI activity increased, the enhancement of photosynthetic O-2 evolution was synchronized with the increase in PSI activity. When temperature was further increased to 40 A degrees C, it induced a decrease in photosynthetic O-2 evolution rate and a more severe decrease in PSII activity, but an increase in PSI activity. These results suggest that PSI activity was the decisive factor determining the change of photosynthetic O-2 evolution when Arthrospira was exposed to a temperature from 25 to 37 A degrees C, but then, PSII activity became the decisive factor adjusting the change of photosynthetic O-2 evolution when the temperature was increased to 40 A degrees C.
关键词Arthrospira Electron Transport Heat Stress Photosynthesis
DOI10.1007/s10811-015-0615-4
收录类别SCI
语种英语
WOS记录号WOS:000372256900005
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/126205
专题海洋生物技术研发中心
作者单位1.Chinese Acad Sci, Inst Oceanol, Natl & Local Joint Engn Lab Ecol Mariculture, Qingdao 266071, Shandong, Peoples R China
2.Chinese Acad Sci, Nantong Branch, Inst Oceanol, Nantong 226004, Jiangsu, Peoples R China
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Zhang, Litao,Liu, Jianguo. Effects of heat stress on photosynthetic electron transport in a marine cyanobacterium Arthrospira sp.[J]. JOURNAL OF APPLIED PHYCOLOGY,2016,28(2):757-763.
APA Zhang, Litao,&Liu, Jianguo.(2016).Effects of heat stress on photosynthetic electron transport in a marine cyanobacterium Arthrospira sp..JOURNAL OF APPLIED PHYCOLOGY,28(2),757-763.
MLA Zhang, Litao,et al."Effects of heat stress on photosynthetic electron transport in a marine cyanobacterium Arthrospira sp.".JOURNAL OF APPLIED PHYCOLOGY 28.2(2016):757-763.
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