Synchronous response of arsenic methylation and methanogenesis in paddy soils with rice straw amendment

Weiwei Zhai; Yanyue Ma; Su Yang; Williamson Gustave; Tiantian Zhao; Muhammad Zaffar Hashmi; Xiangliang Pan; Xianjin Tang

doi:10.1016/j.jhazmat.2022.130380

Synchronous response of arsenic methylation and methanogenesis in paddy soils with rice straw amendment

J Hazard Mater. 2023 Mar 5:445:130380. doi: 10.1016/j.jhazmat.2022.130380. Epub 2022 Nov 12.

Authors

Weiwei Zhai¹, Yanyue Ma², Su Yang³, Williamson Gustave⁴, Tiantian Zhao², Muhammad Zaffar Hashmi⁵, Xiangliang Pan², Xianjin Tang⁶

Affiliations

¹ Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310058, China; Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.
² Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310058, China.
³ Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China; College of Agriculture, Guizhou University, Guiyang 550025, China.
⁴ School of Chemistry, Environmental & Life Sciences, University of the Bahamas, Nassau, New Providence, Bahamas.
⁵ Department of Chemistry, COMSATS University, Islamabad, Pakistan.
⁶ Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China. Electronic address: xianjin@zju.edu.cn.

PMID: 36444805
DOI: 10.1016/j.jhazmat.2022.130380

Abstract

Rice straw (RS) amendment promotes arsenic (As) methylation and methane (CH₄) emissions from paddy soils, which can cause straighthead disease and climate warming. Although methanogens have been identified as critical regulators of methylated As concentrations in flooded soils, the mechanism of these microbial groups on As methylation in paddy soils with RS amendment remains unknown. In this study, paddy soil was incubated to test the response in As methylation and methanogenesis in flooded soil with RS amendment. Our results showed that RS amendment increased the accumulation of monomethylarsonic acid (MMA) and dimethylarsinic acid (DMA) whether methanogenesis was inhibited or not. The methanogens in the genera of Methanocella probably played critical role in promoting As methylation in flooded soil with RS amendment. With the RS amendment, inhibition of methanogenesis led to the accumulation MMA and DMA by suppressing DMA demethylation. The demethylation of DMA was driven by methanogens possibly belonging to the genera of Methanobacterium. This study revealed a wealth of methanogens that dominate As methylation with RS amendment. It will provide guidance to RS amendment in As contaminated paddy soil and has important implications for rice quality and global climate change.

Keywords: 2-Bromoethanesulfonate; Arsenic methylation; Methanogenesis; Paddy soils; Rice straw amendment.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Arsenic* / analysis
Cacodylic Acid
Methylation
Oryza*
Soil
Soil Pollutants* / analysis

Substances

Arsenic
Soil
monomethylarsonic acid
Cacodylic Acid
Soil Pollutants