Marine diatom Thalassirosira weissflogii nutrient drawdown and its physiological status variation challenged to zinc and cadmium exposure

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	Marine diatom Thalassirosira weissflogii nutrient drawdown and its physiological status variation challenged to zinc and cadmium exposure
	Chundi, L ; Aimin, L ; Wen, Y ; Fujun, M ; Shaoyong, C
刊名	ACTA OCEANOLOGICA SINICA
	2007
卷号	26 期号:6 页码:51-61
关键词	zinc cadmium diatom replacement phosphate silicate
ISSN号	0253-505X
通讯作者	longam@scsio.ac.cn
中文摘要	The uptake of zinc and cadmium by a species of marine diatom Thalassirosira weissflogii and the nutrient variation ( phosphorus and silicon) in the culture medium were estimated when exposed to zinc and cadmium stress under controlled laboratory conditions. It was found that low cadmium addition could stimulate the culture to grow with a relatively high rate and exert its toxicity at the elevated concentration. The cellular uptake of zinc and cadmium by the diatom varied in the ranges of 1.21 similar to 3.75 and 0.060 similar to 0.629 fmol per cell respectively in the whole cultivation period. The mean cellular phosphorus and silicon drawdowns were constant with 0.26 similar to 0.42 and 0.30 similar to 0.46 pmol per cell respectively in those healthy cultures. It is illustrated that the algal cells can adjust some physiological mechanisms to decrease metal accumulation and keep metal homeostasis in the organism. The correlation analysis results further indicate that the cellular cadmium uptake might be closely related with the cellular phosphorus, silicon drawdown and the growth rate of diatom ( P < 0.05, 0.001, 0.01); and the cultures grow better in good conditions, the lower amount of phosphor-us, silicon materials are consumed by a single cell to keep a high efficiency of utilization.
学科主题	Oceanography
收录类别	SCI
原文出处	CHINA OCEAN PRESS
WOS记录号	WOS:000252472300005
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/4456]
专题	南海海洋研究所_中科院边缘海地质重点实验室
推荐引用方式 GB/T 7714	Chundi, L,Aimin, L,Wen, Y,et al. Marine diatom Thalassirosira weissflogii nutrient drawdown and its physiological status variation challenged to zinc and cadmium exposure[J]. ACTA OCEANOLOGICA SINICA,2007,26(6):51-61.
APA	Chundi, L,Aimin, L,Wen, Y,Fujun, M,&Shaoyong, C.(2007).Marine diatom Thalassirosira weissflogii nutrient drawdown and its physiological status variation challenged to zinc and cadmium exposure.ACTA OCEANOLOGICA SINICA,26(6),51-61.
MLA	Chundi, L,et al."Marine diatom Thalassirosira weissflogii nutrient drawdown and its physiological status variation challenged to zinc and cadmium exposure".ACTA OCEANOLOGICA SINICA 26.6(2007):51-61.