Root cell wall chemistry remodelling enhanced arsenic fixation of a cabbage cultivar

Wei Xiong Huang; Xun Wen Chen; Li Wu; Zheng Sheng Yu; Meng Ying Gao; Hai Ming Zhao; Ce Hui Mo; Yan Wen Li; Quan Ying Cai; Ming Hung Wong; Hui Li

doi:10.1016/j.jhazmat.2021.126165

Root cell wall chemistry remodelling enhanced arsenic fixation of a cabbage cultivar

J Hazard Mater. 2021 Oct 15:420:126165. doi: 10.1016/j.jhazmat.2021.126165. Epub 2021 May 20.

Authors

Affiliations

¹ Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China.
² Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
³ Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; The Education University of Hong Kong, Tai Po, Hong Kong, China.
⁴ Guangdong Provincial Research Centre for Environment Pollution Control and Remediation Materials, Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China. Electronic address: tlihui@jnu.edu.cn.

PMID: 34273883
DOI: 10.1016/j.jhazmat.2021.126165

Abstract

The low- and high-arsenic (As) transferring cultivars (LTC and HTC) of cabbage showed significant differences in As uptake and distribution. We hypothesise that chemistry of root cell wall matrix plays a critical role. LTC and HTC were treated with As and grown for 60 days. As concentration and distribution at subcellular and cell wall component (pectin, hemicellulose and lignin) levels were determined. Remodelling enzymes (PME and PAL) and functional groups of cell wall were analysed. Results showed that shoot biomass of LTC was not affected by As. Less As was accumulated in shoot of LTC than HTC. LTC allocated more As in root and majority of As was deposited in cell wall. LTC had more hemicellulose 1 (HC1) and lignin, PME and PAL activities. The uronic acid contents of pectin, HC1 or HC2 were all positively (P < 0.05) correlated with As concentrations in each component, respectively. Chemistry of LTC root cell wall was remodelled in terms of changes in porosity, HC and lignin contents, and functional groups, which potentially exerted coupling effects on As entering and deposition. The LTC can restrain As in roots through changing characteristics of root cell wall matrix.

Keywords: Functional group; Hemicellulose; Pectin methylesterase; Subcellular fraction; Vegetable.

Publication types

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

MeSH terms

Arsenic*
Brassica*
Cadmium / analysis
Cell Wall / chemistry
Plant Roots / chemistry
Soil Pollutants* / analysis

Substances

Soil Pollutants
Cadmium
Arsenic