Enriched accumulation and biotransformation of selenium in the edible seaweed Laminaria japonica

doi:10.1021/jf040195k

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	Enriched accumulation and biotransformation of selenium in the edible seaweed Laminaria japonica
	Yan, XJ ; Zheng, L ; Chen, HM ; Lin, W ; Zhang, WW ; Yan, XJ, Ningbo Univ, Marine Biotechnol Lab, Post Box 71, Ningbo 315211, Peoples R China
刊名	JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
	2004-10-20
卷号	52 期号:21 页码:6460-6464
关键词	Selenium Seaweed Accumulation Biotransformation
ISSN号	0021-8561
DOI	10.1021/jf040195k
文献子类	Article
英文摘要	Accumulations of selenium in kelp Laminaria japonica cultured in seawater was achieved by adding selenite (Na2SeO3) with or without N-P (NaNO3 + NaH2PO4) nutrients at different concentrations. Biotransformation of selenium in the kelp was investigated through measuring the selenium of biological samples and different biochemical fractionations. The results showed that the optimal selenite-enrichment concentration is 200 mg L-1, which can allow the kelp to accumulate a total selenium content from 0.51 +/- 0.15 to 26.23 +/- 3.12 mug g(-1) of fresh weight (fw). Selenium composition analysis of kelp (control group) showed that selenium is present as organic selenium, which is up to 86.22% of the total selenium, whereas inorganic selenium is barely 4.85%. When L. japonica was exposed for 56 h in seawater containing 200 mg L-1 Na2SeO3, the organic selenium was 16.70 mug g(-1) of fw (68.23%) and inorganic selenium was 4.71 mug g(-1) of fw (19.26%). The capability of accumulation of selenium was further enhanced by adding N-P nutrients to the selenite-enriched medium. Total selenium is increased to be 33.65 mug g(-1) of fw at optimal concentration of N-P nutrient (150 mg L-1 NaNO3 and 25 mg L-1 NaH2PO4), whereas the inorganic selenium was not increased and remained at 4.597 mug g(-1) of fw (13.36%), and the increased part of selenium was organic selenium. This implied that kelp L. japonica could effectively transform inorganic selenium into organic selenium through metabolism.; Accumulations of selenium in kelp Laminaria japonica cultured in seawater was achieved by adding selenite (Na2SeO3) with or without N-P (NaNO3 + NaH2PO4) nutrients at different concentrations. Biotransformation of selenium in the kelp was investigated through measuring the selenium of biological samples and different biochemical fractionations. The results showed that the optimal selenite-enrichment concentration is 200 mg L-1, which can allow the kelp to accumulate a total selenium content from 0.51 +/- 0.15 to 26.23 +/- 3.12 mug g(-1) of fresh weight (fw). Selenium composition analysis of kelp (control group) showed that selenium is present as organic selenium, which is up to 86.22% of the total selenium, whereas inorganic selenium is barely 4.85%. When L. japonica was exposed for 56 h in seawater containing 200 mg L-1 Na2SeO3, the organic selenium was 16.70 mug g(-1) of fw (68.23%) and inorganic selenium was 4.71 mug g(-1) of fw (19.26%). The capability of accumulation of selenium was further enhanced by adding N-P nutrients to the selenite-enriched medium. Total selenium is increased to be 33.65 mug g(-1) of fw at optimal concentration of N-P nutrient (150 mg L-1 NaNO3 and 25 mg L-1 NaH2PO4), whereas the inorganic selenium was not increased and remained at 4.597 mug g(-1) of fw (13.36%), and the increased part of selenium was organic selenium. This implied that kelp L. japonica could effectively transform inorganic selenium into organic selenium through metabolism.
学科主题	Agriculture, Multidisciplinary ; Chemistry, Applied ; Food Science & Technology
URL标识	查看原文
语种	英语
WOS记录号	WOS:000224509400015
公开日期	2010-11-18
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/1704]
专题	海洋研究所_实验海洋生物学重点实验室
通讯作者	Yan, XJ, Ningbo Univ, Marine Biotechnol Lab, Post Box 71, Ningbo 315211, Peoples R China
作者单位	1.Ningbo Univ, Marine Biotechnol Lab, Ningbo 315211, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Yan, XJ,Zheng, L,Chen, HM,et al. Enriched accumulation and biotransformation of selenium in the edible seaweed Laminaria japonica[J]. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,2004,52(21):6460-6464.
APA	Yan, XJ,Zheng, L,Chen, HM,Lin, W,Zhang, WW,&Yan, XJ, Ningbo Univ, Marine Biotechnol Lab, Post Box 71, Ningbo 315211, Peoples R China.(2004).Enriched accumulation and biotransformation of selenium in the edible seaweed Laminaria japonica.JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,52(21),6460-6464.
MLA	Yan, XJ,et al."Enriched accumulation and biotransformation of selenium in the edible seaweed Laminaria japonica".JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 52.21(2004):6460-6464.