Subcellular localization of copper in tolerant and non-tolerant plant

编号 zgly0000376536

文献类型 期刊论文

文献题名 Subcellular localization of copper in tolerant and non-tolerant plant

学科分类 220.10;林业基础学科

作者 NICai-ying  CHENYing-xv  LINQi  TIANGuang-ming 

作者单位 DepartmentofEnvironmentalEngineering  InstituteofGeographyandEnvironment 

母体文献 Journal of Environmental Sciences;环境科学学报: 英文版 

年卷期 2005,17(3)

页码 452-456

年份 2005 

分类号 X173  X53 

关键词 铜  亚细胞局部化  土壤污染  重金属  植物生长 

文摘内容 The ability of Elsholtzia splendens Naki( E. splendens) to accumulate copper appears to be governed by its high degree of copper tolerance. However, the tolerance mechanism on the physiological basis is unknown. Using transmission electron microscope (TEM) and energy dispersive analysis of X-rays(EDX), the likely location of copper within the cells of the tolerant and non-tolerant was determined. Here the role of vacuolar and cell wall compartmentalization in this copper tolerant plant were investigated. A direct comparison of copper locations of E. splendens and the non-tolerant Astragalus sinicus L. ( A. sinicus ) showed that the majority of copper in the tolerant was localized primarily in the vacuolar, cell wall, on the plasmamembrane, beside lipid grains induced by copper pollution, in the chloroplasts and amyloids; but in the non-tolerant, copper precipitates only be observed on the plasmamembrane, in the chloroplasts and cytoplasm under copper exposure conditions that were toxic to both species. This revealed that the tolerant accumulates more copper in the vacuole and cell wall than the non-tolerant, where was regarded as the storage compartment of tolerant plant or hyperaccumulator for heavy metals。