Uptake, phytovolatilization, and interconversion of 2,4-dibromophenol and 2,4-dibromoanisole in rice plants

Qing Zhang; Wenqian Kong; Linfeng Wei; Yingjun Wang; Yadan Luo; Pu Wang; Jiyan Liu; Jerald L Schnoor; Guibin Jiang

doi:10.1016/j.envint.2020.105888

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Uptake, phytovolatilization, and interconversion of 2,4-dibromophenol and 2,4-dibromoanisole in rice plants

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Uptake, phytovolatilization, and interconversion of 2,4-dibromophenol and 2,4-dibromoanisole in rice plants

Qing Zhang, Wenqian Kong, Linfeng Wei, Yingjun Wang, Yadan Luo, Pu Wang, Jiyan Liu, Jerald L Schnoor and Guibin Jiang

Environment international, Vol.142(C), pp.105888-105888

09/2020

DOI: 10.1016/j.envint.2020.105888

PMID: 32593840

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Abstract

[Display omitted] •2,4-DBA was more bioaccumulative than 2,4-DBP in leaf sheath and leaf.•Rice plants facilitated the volatilization of 2,4-DBA/DBP.•Demethylation of 2,4-DBA was far greater than methylation of 2,4-DBP in rice plant.•Volatilization of metabolites were efficient to reduce 2,4-DBA/DBP bioaccumulation. The structural analogs, 2,4-dibromophenol (2,4-DBP) and 2,4-dibromoanisole (2,4-DBA), have both natural and artificial sources and are frequently detected in environmental matrices. Their environmental fates, especially volatilization, including both direct volatilization from cultivation solution and phytovolatilization through rice plants were evaluated using hydroponic exposure experiments. Results showed that 2,4-DBA displayed stronger volatilization tendency and more bioaccumulation in aboveground rice tissues. Total volatilized 2,4-DBA accounted for 4.74% of its initial mass and was 3.43 times greater than 2,4-DBP. Phytovolatilization of 2,4-DBA and 2,4-DBP contributed to 6.78% and 41.7% of their total volatilization, enhancing the emission of these two contaminants from hydroponic solution into atmosphere. In this study, the interconversion processes between 2,4-DBP and 2,4-DBA were first characterized in rice plants. The demethylation ratio of 2,4-DBA was 12.0%, 32.0 times higher than methylation of 2,4-DBP. Formation of corresponding metabolites through methylation and demethylation processes also contributed to the volatilization of 2,4-DBP and 2,4-DBA from hydroponic solution into the air phase. Methylation and demethylation processes increased phytovolatilization by 12.1% and 36.9% for 2,4-DBP and 2,4-DBA. Results indicate that phytovolatilization and interconversion processes in rice plants serve as important pathways for the global cycles of bromophenols and bromoanisoles.

Phytovolatilization

2,4-Dibromophenol and 2,4-Dibromoanisole

Rice plants

Demethylation process

Methylation process

ISRP Project 5 2020-2025

Details

Title: Subtitle: Uptake, phytovolatilization, and interconversion of 2,4-dibromophenol and 2,4-dibromoanisole in rice plants
Creators: Qing Zhang - State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Wenqian Kong - State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Linfeng Wei - State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Yingjun Wang - State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Yadan Luo - State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Pu Wang - State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Jiyan Liu - State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Jerald L Schnoor - Department of Civil and Environmental Engineering, University of Iowa, Iowa City, IA 52242, United States
Guibin Jiang - State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Resource Type: Journal article
Publication Details: Environment international, Vol.142(C), pp.105888-105888
DOI: 10.1016/j.envint.2020.105888
PMID: 32593840
NLM abbreviation: Environ Int
ISSN: 0160-4120
eISSN: 1873-6750
Publisher: Elsevier Ltd
Grant note: DOI: 10.13039/501100001809, name: National Natural Science Foundation of China; DOI: 10.13039/100008893, name: University of Iowa; DOI: 10.13039/501100002855, name: Ministry of Science and Technology of the People's Republic of China; DOI: 10.13039/501100002858, name: China Postdoctoral Science Foundation
Language: English
Date published: 09/2020
Academic Unit: Civil and Environmental Engineering; Occupational and Environmental Health; Iowa Superfund Research Program
Record Identifier: 9983997431902771

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