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学科主题: Oceanography
题名: Marine diatom Thalassirosira weissflogii nutrient drawdown and its physiological status variation challenged to zinc and cadmium exposure
作者: Chundi, L ; Aimin, L ; Wen, Y ; Fujun, M ; Shaoyong, C
通讯作者: longam@scsio.ac.cn
关键词: zinc ; cadmium ; diatom ; replacement ; phosphate ; silicate
刊名: ACTA OCEANOLOGICA SINICA
发表日期: 2007
卷: 26, 期:6, 页:51-61
收录类别: sci
部门归属: [Chundi, Li; Aimin, Long; Wen, Yan; Fujun, Ma; Shaoyong, Chen] Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Trop Marine Environm Dynam, Guangzhou 510301, Peoples R China; [Chundi, Li; Wen, Yan] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
项目归属: 海洋地质
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.
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WOS记录号: WOS:000252472300005
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4456
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Chundi, L; Aimin, L; Wen, Y; Fujun, M; Shaoyong, C.Marine diatom Thalassirosira weissflogii nutrient drawdown and its physiological status variation challenged to zinc and cadmium exposure,ACTA OCEANOLOGICA SINICA,2007,26(6):51-61
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