期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 28, 期 11, 页码 13112-13123出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-020-11577-3
关键词
Pb; C; rupestris; Sulfhydryl compounds; Subcellular fraction; Time
资金
- Nature Fund of Anhui Province of China [1808085MD100]
- Natural Science Foundation of China [41877418]
- Key S&T Special Projects of Anhui Province of China [17030701053]
- Natural Students' Innovation and Entrepreneurship Training Program [201710364058]
The study revealed that under lead stress, NPT, GSH, and PCs play an important detoxification role in the cell wall and soluble fraction of C. rupestris, with PCs being particularly important in organelles.
This study aimed to determine the role of sulfhydryl compounds in the subcells of C. rupestris under Pb stress. Different concentrations (0, 0.5, 1.0, 2.5, 5.0, 7.5, and 10 mg/L) and different exposure days (1, 3, 5, and 7 days) were designed to analyze the subcellular distribution of non-protein thiols (NPT), glutathione (GSH), and phytochelatins (PCs) in C. rupestris. NPT, GSH, and PCs increased significantly with increasing Pb stress in the cell wall and soluble fraction, especially NPT. NPT and GSH slowly increased, and PCs showed no significant difference in the organelle of C. rupestris at low concentrations (< 5.0 mg/L). PCs slightly increased under 5.0 mg/L of Pb stress. PCs/NPT gradually increased with Pb stress at a low Pb concentration. GSH detoxification response lagged behind those of NPT and PCs in response to time. PCs/NPT initially increased and then decreased with Pb stress duration. This study suggested that NPT, GSH, and PCs played an important role in the detoxification of the cell wall and the soluble fraction of C. rupestris under Pb stress. PCs were important in the organelle.
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