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	Interaction between cadmium and atrazine during uptake by rice seedlings (Oryza sativa L.)
	Lin, AJ; Su, YH; Zhu, YG; Zhang, XH
	2005
会议日期	JUN 07-10, 2004
会议地点	Beijing, PEOPLES R CHINA
关键词	Atrazine Cadmium Rice Seedlings Uptake Bioconcentration Factor
DOI	10.1016/j.chemosphere.2005.04.022
英文摘要	The uptake of atrazine by rice seedlings (Oryza sativa L.) through plant roots from nutrient solution was investigated in the presence and absence of Cd2+ over an exposure period of four weeks. It was found that both atrazine and Cd2+ were toxic to rice seedlings. Both shoot and root biomasses decreased when the seedlings were exposed to increasing atrazine or Cd2+ concentrations in nutrient solutions. In the absence of Cd2+, a linear relationship was observed between atrazine concentrations in roots/shoots and in external solution, and more atrazine is concentrated in roots than in shoots. When atrazine and Cd2+ concentrations in solution were maintained at mole ratio of 1:1, the accumulation of atrazine by seedlings was less and the seedling biomass was greater than found with other ratios, such as 1:2 or 2:1. Therefore, the formation of the complex between atrazine and Cd2+ reduced the individual toxicities. Analyses of data with the quasi-equilibrium partition model indicated that the atrazine concentrations in rice seedlings and external water were close to equilibrium. In the presence of Cd2+, however, the measured bioconcentration factor (BCF) of atrazine with roots and shoots were considerably greater. The latter findings resulted presumably from the atrazine-Cd2+ complex formation that led to a large apparent BCF. (C) 2005 Elsevier Ltd. All rights reserved.
ISSN号	0045-6535
内容类型	会议论文
源URL	[http://ir.rcees.ac.cn/handle/311016/24772]
专题	生态环境研究中心_土壤环境科学实验室
推荐引用方式 GB/T 7714	Lin, AJ,Su, YH,Zhu, YG,et al. Interaction between cadmium and atrazine during uptake by rice seedlings (Oryza sativa L.)[C]. 见:. Beijing, PEOPLES R CHINA. JUN 07-10, 2004.

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