期刊
BIOLOGIA PLANTARUM
卷 53, 期 2, 页码 369-372出版社
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.1007/s10535-009-0069-0
关键词
Allium sativum L.; dictyosomes; endoplasmic reticulum; mitochondria; nucleus; ultrastructure; vesicles
资金
- National Natural Science Foundation of China
Studies on cadmium effects in the root meristematic cells of Allium sativum L. were carried out using electron microscopy in order to explain the possible mechanisms of garlic seedlings' tolerance to Cd stress. Seedlings were treated with 0.01, 0.10 and 1.00 mM CdCl2 solutions for 0.5, 1, 2, 4, 8, 10, 12, 24 and 48 h, respectively. The results indicated that cell walls, plasma membrane and main organelles actively participated in Cd detoxification and tolerance at low Cd concentrations. Once excessive Cd ions entered the cytosol, a defence mechanism becomes activated, protecting the cells against cadmium toxicity. However, under high Cd content in cells, the cell structure was damaged, even leading to cells death.
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