Involvement of cyclic electron flow in irradiance stress responding and its potential regulation of the mechanisms in Pyropia yezoensis

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	Involvement of cyclic electron flow in irradiance stress responding and its potential regulation of the mechanisms in Pyropia yezoensis
	Niu Jianfeng 1,3,4; Feng Jianhua 2; Xie Xiujun 1,4; Gao Shan 1,4; Wang Guangce 1,3,4
刊名	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
	2016-07-01
卷号	34 期号:4 页码:730-739
关键词	cyclic electron flow dual-PAM Pyropia yezoensis irradiation stress photoprotective mechanism
英文摘要	Pyropia yezoensis, belongs to the genus of Porphyra before 2011, inhabit on intertidal zone rocks where irradiation changes dramatically, implying that the seaweed has gained certain mechanisms to survive a harsh environment. Based on the photosynthetic parameters with or without the inhibitors determined by a Dual-PAM-100 apparatus, we investigated the photosynthetic performance and the changes in electron flow that occurred during the algae were stressed with different light intensities previously. When the irradiation saturation was approaching, the CEF around PS I became crucial since the addition of inhibitors usually led to an increase in non-photochemical quenching. The inhibitor experiments showed that there were at least three different CEF pathways in Py. yezoensis and these pathways compensated each other. In addition to maintaining a proper ratio of ATP/NAD(P)H to support efficient photosynthesis, the potential roles of CEF might also include the regulation of different photoprotective mechanisms in Py. yezoensis. Under the regulation of CEF, chlororespiration is thought to transport electrons from the reduced plastoquinone (PQ) pool to oxygen in order to mitigate the reduction in the electron transfer chain. When irradiation was up to the high-grade stress conditions, the relative value of CEF began to decrease, which implied that the NADP(+) pool or PQ(+) pool was very small and that the electrons were transferred from reduced PS I to oxygen. The scavenging enzymes might be activated and the water-water cycle probably became an effective means of removing the active oxygen produced by the irradiation stressed Py. yezoensis. We believe that the different mechanisms could make up the photoprotective network to allow Py. yezoensis for survival in a highly variable light stress habitat, which may enlighten scientists in future studies on irradiance stress in other algae species.
收录类别	SCI
语种	英语
WOS记录号	WOS:000377207800009
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/126222]
专题	海洋研究所_实验海洋生物学重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao 266071, Peoples R China 2.Tianjin Univ Sci & Technol, Coll Marine Sci & Engn, Tianjin 300457, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Nantong Branch, Nantong 226006, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Niu Jianfeng,Feng Jianhua,Xie Xiujun,et al. Involvement of cyclic electron flow in irradiance stress responding and its potential regulation of the mechanisms in Pyropia yezoensis[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2016,34(4):730-739.
APA	Niu Jianfeng,Feng Jianhua,Xie Xiujun,Gao Shan,&Wang Guangce.(2016).Involvement of cyclic electron flow in irradiance stress responding and its potential regulation of the mechanisms in Pyropia yezoensis.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,34(4),730-739.
MLA	Niu Jianfeng,et al."Involvement of cyclic electron flow in irradiance stress responding and its potential regulation of the mechanisms in Pyropia yezoensis".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 34.4(2016):730-739.