The physiological links of the increased photosystem II activity in moderately desiccated Porphyra haitanensis (Bangiales, Rhodophyta) to the cyclic electron flow during desiccation and re-hydration

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	The physiological links of the increased photosystem II activity in moderately desiccated Porphyra haitanensis (Bangiales, Rhodophyta) to the cyclic electron flow during desiccation and re-hydration
	Gao, Shan ; Niu, Jianfeng ; Chen, Weizhou ; Wang, Guangce ; Xie, Xiujun ; Pan, Guanghua ; Gu, Wenhui ; Zhu, Daling
刊名	PHOTOSYNTHESIS RESEARCH
	2013
卷号	116 期号:1 页码:45-54
关键词	Cyclic electron flow Desiccation Photosystem I and II Porphyra haitanensis
ISSN号	0166-8595
通讯作者	Wang, GC
中文摘要	Photosynthetic electron flow changed considerably during desiccation and re-hydration of the intertidal macroalgae Porphyra haitanensis. Activities of both photosystem (PSI) and photosystem (PSII) increased significantly at moderate desiccation levels. Whereas PSII activity was abolished at an absolute water content (AWC) < 24 %, PSI remained active with progressive decreases in AWC to values as low as 16 %. This result suggested that cyclic electron flow around PSI was still active after inactivation of linear electron flow following severe desiccation. Moreover, the PSI activity was restored more rapidly than that of PSII upon re-hydration. Pretreatment of the blades with 3-(3',4'-dichlorophenyl)-1,1-dimethylurea (DCMU) suppressed PSII activity following desiccation to an AWC of similar to 16 % AWC. Cyclic electron flow around PSI decreased markedly in blades pretreated with DCMU than in blades without pretreatment of DCMU during re-hydration in seawater containing DCMU. All results suggested that the activity of PSII under desiccation conditions plays an important role in the operation of cyclic electron flow during desiccation and its recovery during re-hydration. Therefore, we proposed the PSII activity during desiccation could eventually lead to the accumulation of NADPH, which could serve as electron donor for P700(+) and promote its recovery during re-hydration, thereby favoring the operation of cyclic electron flow.
学科主题	Plant Sciences
收录类别	SCI
原文出处	10.1007/s11120-013-9892-4
语种	英语
公开日期	2014-07-17
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/16656]
专题	海洋研究所_实验海洋生物学重点实验室
推荐引用方式 GB/T 7714	Gao, Shan,Niu, Jianfeng,Chen, Weizhou,et al. The physiological links of the increased photosystem II activity in moderately desiccated Porphyra haitanensis (Bangiales, Rhodophyta) to the cyclic electron flow during desiccation and re-hydration[J]. PHOTOSYNTHESIS RESEARCH,2013,116(1):45-54.
APA	Gao, Shan.,Niu, Jianfeng.,Chen, Weizhou.,Wang, Guangce.,Xie, Xiujun.,...&Zhu, Daling.(2013).The physiological links of the increased photosystem II activity in moderately desiccated Porphyra haitanensis (Bangiales, Rhodophyta) to the cyclic electron flow during desiccation and re-hydration.PHOTOSYNTHESIS RESEARCH,116(1),45-54.
MLA	Gao, Shan,et al."The physiological links of the increased photosystem II activity in moderately desiccated Porphyra haitanensis (Bangiales, Rhodophyta) to the cyclic electron flow during desiccation and re-hydration".PHOTOSYNTHESIS RESEARCH 116.1(2013):45-54.