期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 420, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.126165
关键词
Vegetable; Hemicellulose; Subcellular fraction; Pectin methylesterase; Functional group
资金
- National Key Technology R&D Program of China [2020YFC1807604]
- Science and Technology Program of Guangzhou [201904010084]
- National Natural Science Foundation of China [41877350, 42030713]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2021B1515020014]
- Department of Education of Guangdong Province, China [2020KCXTD006]
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control
This study found significant differences in arsenic uptake and distribution between low-arsenic transferring and high-arsenic transferring cultivars of cabbage, with the former accumulating less arsenic in shoots and more in roots, specifically in the cell wall. The low-arsenic cultivar exhibited changes in root cell wall matrix chemistry, potentially influencing arsenic entry and deposition.
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.
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