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Fluorescent properties and bifenthrin binding behavior of maize (Zea mays L.) seedling root exudates
Xiangliang Pan; Jianying Yang; Shuyong Mu; Daoyong Zhang
Corresponding AuthorDaoyong Zhang
2012
Source PublicationEuropean Journal of Soil Biology
Volume50Issue:1Pages:106-108
Abstract

The binding parameters of root exudates for organic pollutants are important for understanding the mechanisms involved in phytoavailability and phytoremediation. However, quantitative information about organic pollutant binding to root exudates is lacking. Fluorescent properties and bifenthrin (insecticide) binding behavior of root exudates from maize (Zea mays L.) seedlings were investigated using excitation emission matrix fluorescence spectroscopy. The protein-like fluorophores in root exudates from (Z. mays L.) are strong complexing ligands for bifenthrin, with logKa in the range of 3.6–5.7. Two protein-like fluorescence peaks were identified in the EEM spectrum of root exudates and fluorescence of both peaks could be quenched by bifenthrin. The protein-like substances in root exudates had larger binding capacity for bifenthrin under acidic condition than under neutral and basic condition. The conditional stability constants were also higher in acidic solution than in the neutral or basic solution. Similarly, more fluorescence is accessible for bifenthrin at acidic pHs. More than one binding sites are needed in root exudates for binding one bifenthrin molecule. Enough attention should be paid to the effects of root exudates on adsorption, transport and fate of pesticides in environments.


KeywordBifenthrin Root Exudates Complexation Fluorescence Quenching
Subject Area环境地球化学
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/4838
Collection环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
Corresponding AuthorDaoyong Zhang
Recommended Citation
GB/T 7714
Xiangliang Pan,Jianying Yang,Shuyong Mu,et al. Fluorescent properties and bifenthrin binding behavior of maize (Zea mays L.) seedling root exudates[J]. European Journal of Soil Biology,2012,50(1):106-108.
APA Xiangliang Pan,Jianying Yang,Shuyong Mu,&Daoyong Zhang.(2012).Fluorescent properties and bifenthrin binding behavior of maize (Zea mays L.) seedling root exudates.European Journal of Soil Biology,50(1),106-108.
MLA Xiangliang Pan,et al."Fluorescent properties and bifenthrin binding behavior of maize (Zea mays L.) seedling root exudates".European Journal of Soil Biology 50.1(2012):106-108.
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