Effects of exposure time and co-existing organic compounds on uptake of atrazine from nutrient solution by rice seedlings (Oryza sativa L.)

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 土壤环境科学实验室

	Effects of exposure time and co-existing organic compounds on uptake of atrazine from nutrient solution by rice seedlings (Oryza sativa L.)
	Lin, Ai-Jun; Su, Yu-Hong; Zhu, Yong-Guan; Zhang, Xu-Hong
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2007-03-06
卷号	141 期号:1 页码:223-229
关键词	Atrazine Plant Uptake Exposure Time Rice Seedlings Bioconcentration Factor
英文摘要	Root uptake of atrazine (ATR) by rice seedlings (Oryza sativa L.) from nutrient solution was investigated with exposure periods of 48, 96, and 240 It. A similar ATR uptake was carried out with two co-existing organic compounds (o-chlorophenol (CP) and 2,4-dichlorophenot (DCP)) with 48 It exposure. In contact with the seedlings, the ATR level in nutrient solution decreased sharply during the early exposure and then reached relatively steady levels after 48 h. It was observed that the ATR levels within whole seedlings approached the estimated equilibrium partition limits in about 48 h, according to the partition-limited model utilizing the measured plant water and organic matter contents and the ATR partition coefficients with whole seedlings. However, when roots and shoots were consisted separately, the detected ATR levels in roots were lower than estimated equilibrium limit while the levels in shoots exceeded the equilibrium limit. The data with roots suggested the occurrence of rapid ATR degradation in roots. The results with shoots are intrinsically consistent with the suggested complex formation of ATR with free metal ions in shoots. The ATR levels in roots and shoots varied to a moderate extent when the seedlings were exposed to different levels of ATR-CP-DCP mixtures. The variation results presumably from the interference of coexisting CP and DCP and the phytotoxicity of the mixed chemicals. (c) 2006 Elsevier B.V. All rights reserved.
WOS记录号	WOS:000244985900030
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/22640]
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, Ai-Jun,Su, Yu-Hong,Zhu, Yong-Guan,et al. Effects of exposure time and co-existing organic compounds on uptake of atrazine from nutrient solution by rice seedlings (Oryza sativa L.)[J]. JOURNAL OF HAZARDOUS MATERIALS,2007,141(1):223-229.
APA	Lin, Ai-Jun,Su, Yu-Hong,Zhu, Yong-Guan,&Zhang, Xu-Hong.(2007).Effects of exposure time and co-existing organic compounds on uptake of atrazine from nutrient solution by rice seedlings (Oryza sativa L.).JOURNAL OF HAZARDOUS MATERIALS,141(1),223-229.
MLA	Lin, Ai-Jun,et al."Effects of exposure time and co-existing organic compounds on uptake of atrazine from nutrient solution by rice seedlings (Oryza sativa L.)".JOURNAL OF HAZARDOUS MATERIALS 141.1(2007):223-229.