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	The enhancement of cyclic electron flow around photosystem I improves the recovery of severely desiccated Porphyra yezoensis (Bangiales, Rhodophyta)
	Gao, Shan1,2; Wang, Guangce1
	2012-07-01
发表期刊	JOURNAL OF EXPERIMENTAL BOTANY
ISSN	0022-0957
卷号	63期号:12页码:4349-4358
摘要	Porphyra yezoensis, a representative species of intertidal macro-algae, is able to withstand periodic desiccation at low tide but is submerged in seawater at high tide. In this study, changes in photosynthetic electron flow in P. yezoensis during desiccation and re-hydration were investigated. The results suggested that the cyclic electron flow around photosystem I (PSI) increased significantly during desiccation, continued to operate at times of severe desiccation, and showed greater tolerance to desiccation than the electron flow around PSII. In addition, PSI activity in desiccated blades recovered faster than PSII activity during re-hydration. Even though linear electron flow was suppressed by DCMU [3-(3',4'-dichlorophenyl)-1,1-dimethylurea], cyclic electron flow could still be restored. This process was insensitive to antimycin A and could be suppressed by dibromothymoquinone (DBMIB). The prolonged dark treatment of blades reduced the speed in which the cyclic electron flow around PSI recovered, suggesting that stromal reductants, including NAD(P)H, played an important role in the donation of electrons to PSI and were the main cause of the rapid recovery of cyclic electron flow in desiccated blades during re-hydration. These results suggested that cyclic electron flow in P. yezoensis played a significant physiological role during desiccation and re-hydration and may be one of the most important factors allowing P. yezoensis blades to adapt to intertidal environments.
关键词	Cyclic electron flow desiccation photosystem I Porphyra yezoensis
DOI	10.1093/jxb/ers082
语种	英语
资助项目	National Natural Science Foundation of China[30830015] ; National Natural Science Foundation of China[30970302] ; National Natural Science Foundation of China[40806063] ; National Natural Science Foundation of China[B49082401]
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:000307821100004
出版者	OXFORD UNIV PRESS
引用统计	被引频次：87[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/337002/12391
专题	实验海洋生物学重点实验室
通讯作者	Wang, Guangce
作者单位	1.Chinese Acad Sci IOCAS, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Gao, Shan,Wang, Guangce. The enhancement of cyclic electron flow around photosystem I improves the recovery of severely desiccated Porphyra yezoensis (Bangiales, Rhodophyta)[J]. JOURNAL OF EXPERIMENTAL BOTANY,2012,63(12):4349-4358.
APA	Gao, Shan,&Wang, Guangce.(2012).The enhancement of cyclic electron flow around photosystem I improves the recovery of severely desiccated Porphyra yezoensis (Bangiales, Rhodophyta).JOURNAL OF EXPERIMENTAL BOTANY,63(12),4349-4358.
MLA	Gao, Shan,et al."The enhancement of cyclic electron flow around photosystem I improves the recovery of severely desiccated Porphyra yezoensis (Bangiales, Rhodophyta)".JOURNAL OF EXPERIMENTAL BOTANY 63.12(2012):4349-4358.

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