Periodic exposure to ambient solar irradiance benefits the growth of juvenile seedlings of Hizikia fusiformis

doi:10.1007/s00343-011-0195-3

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	Periodic exposure to ambient solar irradiance benefits the growth of juvenile seedlings of Hizikia fusiformis
	Shan Tifeng; Pang Shaojun; Gao Suqin
	2011-09-01
发表期刊	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN	0254-4059
卷号	29 期号:5 页码:1009-1014
文章类型	Article
摘要	In our trials, from 2007 to 2008, of mass production of seedlings of Hizikia fusiformis using synchronization techniques, problems of a "dark thalli" phenomenon and epiphytes contamination severely threatened the health of juvenile seedlings. In this investigation, we optimized conditions for improving the growth of juvenile seedlings. Seven string collectors were seeded with zygotes and a series of experiments were conducted including direct exposure to solar irradiance, co-culture with Ulva spp. and treatment with sodium hypochlorite. It was found that direct exposure to solar irradiance (maximum: 1 740 mu mol photons/(m(2)center dot s)) for 2 h per day could efficiently enhance the growth of young seedlings and simultaneously inhibit the growth of epiphytic algae. In this treatment, 50-day old seedlings could reach an average of 0.44 cm in length and possess up to nine leaflets. However, a single treatment with 18-mmol/L sodium hypochlorite for 10 min severely harmed 15-day old seedlings. In comparison, weekly treatment with 2.2-mmol/L sodium hypochlorite for 10 min brought no apparent harm to seedlings and eliminated epiphytic algae efficiently. However, this treatment significantly increased the detachment rate of seedlings. Inoculating Ulva spp. onto the collector caused a dramatic decrease in the number of seedlings. However, the growth of the remaining seedlings appeared unhampered. All collectors except the control were daily sprayed with a high pressure water jet from the 8(th) day post fertilization. From the first day to 50(th) day, no "dark thallus" was observed on any of the seven collectors. We believe that well-timed daily exposure to solar irradiance would favor H. fusiformis in its early growing stages.; In our trials, from 2007 to 2008, of mass production of seedlings of Hizikia fusiformis using synchronization techniques, problems of a "dark thalli" phenomenon and epiphytes contamination severely threatened the health of juvenile seedlings. In this investigation, we optimized conditions for improving the growth of juvenile seedlings. Seven string collectors were seeded with zygotes and a series of experiments were conducted including direct exposure to solar irradiance, co-culture with Ulva spp. and treatment with sodium hypochlorite. It was found that direct exposure to solar irradiance (maximum: 1 740 mu mol photons/(m(2)center dot s)) for 2 h per day could efficiently enhance the growth of young seedlings and simultaneously inhibit the growth of epiphytic algae. In this treatment, 50-day old seedlings could reach an average of 0.44 cm in length and possess up to nine leaflets. However, a single treatment with 18-mmol/L sodium hypochlorite for 10 min severely harmed 15-day old seedlings. In comparison, weekly treatment with 2.2-mmol/L sodium hypochlorite for 10 min brought no apparent harm to seedlings and eliminated epiphytic algae efficiently. However, this treatment significantly increased the detachment rate of seedlings. Inoculating Ulva spp. onto the collector caused a dramatic decrease in the number of seedlings. However, the growth of the remaining seedlings appeared unhampered. All collectors except the control were daily sprayed with a high pressure water jet from the 8(th) day post fertilization. From the first day to 50(th) day, no "dark thallus" was observed on any of the seven collectors. We believe that well-timed daily exposure to solar irradiance would favor H. fusiformis in its early growing stages.
关键词	Hizikia Fusiformis Solar Irradiance Dark Thalli Epiphytes Resistance
学科领域	Marine & Freshwater Biology ; Oceanography
DOI	10.1007/s00343-011-0195-3
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000293632500013
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/11913
专题	实验海洋生物学重点实验室
作者单位	Chinese Acad Sci, Inst Oceanol, Marine Biol Culture Collect Ctr, Qingdao 266071, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Shan Tifeng,Pang Shaojun,Gao Suqin. Periodic exposure to ambient solar irradiance benefits the growth of juvenile seedlings of Hizikia fusiformis[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2011,29(5):1009-1014.
APA	Shan Tifeng,Pang Shaojun,&Gao Suqin.(2011).Periodic exposure to ambient solar irradiance benefits the growth of juvenile seedlings of Hizikia fusiformis.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,29(5),1009-1014.
MLA	Shan Tifeng,et al."Periodic exposure to ambient solar irradiance benefits the growth of juvenile seedlings of Hizikia fusiformis".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 29.5(2011):1009-1014.

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