Effects of heat stress on photosynthetic electron transport in a marine cyanobacterium Arthrospira sp.

	Effects of heat stress on photosynthetic electron transport in a marine cyanobacterium Arthrospira sp.
	Zhang, Litao 1; Liu, Jianguo 1,2
刊名	JOURNAL OF APPLIED PHYCOLOGY
	2016-04-01
卷号	28 期号:2 页码:757-763
关键词	Arthrospira Electron transport Heat stress Photosynthesis
英文摘要	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.
收录类别	SCI
语种	英语
WOS记录号	WOS:000372256900005
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/126205]
专题	海洋研究所_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
推荐引用方式 GB/T 7714	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.