Effects of hypo- and hypersalinity on photosynthetic performance of Sargassum fusiforme (Fucales, Heterokontophyta)

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	Effects of hypo- and hypersalinity on photosynthetic performance of Sargassum fusiforme (Fucales, Heterokontophyta)
	Xie, X. J.1,3; Wang, X. L.1,3,4; Lin, L. D.2; He, L. W.1,3; Gu, W. H.1,3; Gao, S.1,3; Yan, X. F.2; Pan, G. H.5; Wu, M. J.2; Wang, G. C.1,3
刊名	PHOTOSYNTHETICA
	2016-06-01
卷号	54 期号:2 页码:210-218
关键词	aquaculture chlorophyll a fluorescence dithiothreitol rapid light curve violaxanthin
英文摘要	Photoprotection mechanisms protect photosynthetic organisms, especially under stress conditions, against photodamage that may inhibit photosynthesis. We investigated the effects of short-term immersion in hypo- and hypersalinity sea water on the photosynthesis and xanthophyll cycle in Sargassum fusiforme (Harvey) Setchell. The results indicated that under moderate light [110 mu mol(photon) m(-2) s(-1)], the effective quantum yield of PSII was not reduced in S. fusiforme fronds after 1 h in hyposalinity conditions, even in fresh water, but it was significantly affected by extreme hypersalinity treatment (90aEuro degrees sea water). Under high light [HL, 800 mu mol(photon) m(-2) s(-1)], photoprotective mechanisms operated efficiently in fronds immersed in fresh water as indicated by high reversible nonphotochemical quenching of chlorophyll fluorescence (NPQ) and de-epoxidation state; the quantum yield of PSII recovered during the subsequent relaxation period. In contrast, fronds immersed in 90aEuro degrees sea water did not withstand HL, barely developed reversible NPQ, and accumulated little antheraxanthin and zeaxanthin during HL, while recovery of the quantum yield of PSII was severely inhibited during the subsequent relaxation period. The data provided concrete evidence supporting the short-term tolerance of S. fusiforme to immersion in fresh water compared to hypersalinity conditions. The potential practical implications of these results were also discussed.
收录类别	SCI
语种	英语
WOS记录号	WOS:000374844100005
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.qdio.ac.cn/handle/337002/131019]
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.Wenzhou Univ, Coll Life & Environm Sci, Zhejiang Prov Key Lab Water Environm & Marine Bio, Wenzhou 325035, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266071, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 5.Tianjin Univ Sci & Technol, Coll Marine Sci & Engn, Tianjin Key Lab Marine Sources & Chem, Tianjin 300457, Peoples R China
推荐引用方式 GB/T 7714	Xie, X. J.,Wang, X. L.,Lin, L. D.,et al. Effects of hypo- and hypersalinity on photosynthetic performance of Sargassum fusiforme (Fucales, Heterokontophyta)[J]. PHOTOSYNTHETICA,2016,54(2):210-218.
APA	Xie, X. J..,Wang, X. L..,Lin, L. D..,He, L. W..,Gu, W. H..,...&Wang, G. C..(2016).Effects of hypo- and hypersalinity on photosynthetic performance of Sargassum fusiforme (Fucales, Heterokontophyta).PHOTOSYNTHETICA,54(2),210-218.
MLA	Xie, X. J.,et al."Effects of hypo- and hypersalinity on photosynthetic performance of Sargassum fusiforme (Fucales, Heterokontophyta)".PHOTOSYNTHETICA 54.2(2016):210-218.