Control of reproduction rhythmicity by environmental and endogenous signals in Ulva pseudocurvata (Chlorophyta)

doi:10.1111/j.1529-8817.2008.00535.x

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	Control of reproduction rhythmicity by environmental and endogenous signals in Ulva pseudocurvata (Chlorophyta)
	Luening, Klaus 1; Kadel, Petra 1; Pang, Shaojun 2; Luning, K, Alfred Wegener Inst Polar & Marine Res, Wadden Sea Stn, Hafenstr 43, D-25992 List Auf Sylt, Germany
刊名	JOURNAL OF PHYCOLOGY
	2008-08-01
卷号	44 期号:4 页码:866-873
关键词	Gamete Release Photoperiodism Reproduction Semilunar Rhythmicity Ulva
ISSN号	0022-3646
DOI	10.1111/j.1529-8817.2008.00535.x
文献子类	Article
英文摘要	A field population of Ulva pseudocurvata Koeman et C. Hoek (hereafter termed Ulva) at Sylt Island (North Sea, Germany) exhibited biweekly peaks of gametophytic reproduction during the colder seasons and approximately weekly peaks during summer. The reproductive events lasted 1-5 d and were separated from each other by purely vegetative phases. Under constant conditions in the laboratory, a free-running rhythm was observed with reproductive peaks occurring approximately every 7 d. When artificial moonlight was provided every 4 weeks, fewer reproductive events occurred, and the reproductive rhythm became synchronized to the environmental artificial moonlight rhythm. In the laboratory, apical disks were entirely converted into reproductive tissue after 8 d cultivation, while almost all basal disks stayed vegetative, which prevented the entire loss of the vegetative thallus during reproductive events. Seasonal size reduction of the thallus occurred from late autumn onward and was determined to be controlled by a genuine photoperiodic response, since size reduction could be induced from May onward by experimental short-day (SD) treatment but was prevented in a long-day (LD) or night-break regime (NB). A daily fine-tuning occurred with gamete release early in the morning at the first sign of daylight, following an obligatory dark ("night") period of at least 1 h duration. No release took place if the overnight dark phase was replaced by continuous light. Blue, green, or red light all triggered gamete release after a dark phase at an irradiance of 0.1 mu mol photons . m(-2) .s(-1), while 0.001 mu mol photons . m(-2) . s(-1) was equivalent to a dark control.; A field population of Ulva pseudocurvata Koeman et C. Hoek (hereafter termed Ulva) at Sylt Island (North Sea, Germany) exhibited biweekly peaks of gametophytic reproduction during the colder seasons and approximately weekly peaks during summer. The reproductive events lasted 1-5 d and were separated from each other by purely vegetative phases. Under constant conditions in the laboratory, a free-running rhythm was observed with reproductive peaks occurring approximately every 7 d. When artificial moonlight was provided every 4 weeks, fewer reproductive events occurred, and the reproductive rhythm became synchronized to the environmental artificial moonlight rhythm. In the laboratory, apical disks were entirely converted into reproductive tissue after 8 d cultivation, while almost all basal disks stayed vegetative, which prevented the entire loss of the vegetative thallus during reproductive events. Seasonal size reduction of the thallus occurred from late autumn onward and was determined to be controlled by a genuine photoperiodic response, since size reduction could be induced from May onward by experimental short-day (SD) treatment but was prevented in a long-day (LD) or night-break regime (NB). A daily fine-tuning occurred with gamete release early in the morning at the first sign of daylight, following an obligatory dark ("night") period of at least 1 h duration. No release took place if the overnight dark phase was replaced by continuous light. Blue, green, or red light all triggered gamete release after a dark phase at an irradiance of 0.1 mu mol photons . m(-2) .s(-1), while 0.001 mu mol photons . m(-2) . s(-1) was equivalent to a dark control.
学科主题	Plant Sciences ; Marine & Freshwater Biology
URL标识	查看原文
语种	英语
WOS记录号	WOS:000258099000003
公开日期	2010-11-18
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/1650]
专题	海洋研究所_实验海洋生物学重点实验室
通讯作者	Luning, K, Alfred Wegener Inst Polar & Marine Res, Wadden Sea Stn, Hafenstr 43, D-25992 List Auf Sylt, Germany
作者单位	1.Alfred Wegener Inst Polar & Marine Res, Wadden Sea Stn, D-25992 List Auf Sylt, Germany 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Luening, Klaus,Kadel, Petra,Pang, Shaojun,et al. Control of reproduction rhythmicity by environmental and endogenous signals in Ulva pseudocurvata (Chlorophyta)[J]. JOURNAL OF PHYCOLOGY,2008,44(4):866-873.
APA	Luening, Klaus,Kadel, Petra,Pang, Shaojun,&Luning, K, Alfred Wegener Inst Polar & Marine Res, Wadden Sea Stn, Hafenstr 43, D-25992 List Auf Sylt, Germany.(2008).Control of reproduction rhythmicity by environmental and endogenous signals in Ulva pseudocurvata (Chlorophyta).JOURNAL OF PHYCOLOGY,44(4),866-873.
MLA	Luening, Klaus,et al."Control of reproduction rhythmicity by environmental and endogenous signals in Ulva pseudocurvata (Chlorophyta)".JOURNAL OF PHYCOLOGY 44.4(2008):866-873.