农业环境科学学报2016，Vol.35Issue(4)：654-660,7.DOI:10.11654/jaes.2016.04.007
砷胁迫下磷对三七砷的微区及亚细胞组织分布特征的影响
Effects of phosphorus additions on micro- and sub-cellular distribution of As in Panax notoginseng under As stresses
摘要
Abstract
Panax notoginseng(Burk.)F. H. Chen is one of the traditional precious herbal medicines in China. Arsenic(As)pollution in P. notoginseng has attracted wide attention. In this study, we examined the effects of phosphorus additions on micro- and sub- cellular distri-bution of As in P. notoginseng using synchrotron radiation X-ray fluorescence(SRXRF)and subcellular separation methods. Results showed that large amounts of As was accumulated in roots and stems. Exogenous phosphorus effectively reduced As concentrations in roots, stems and leaves by 47%, 80%and 33%, respectively. The amount of As accumulation was different in different parts of subcellular components. Cytochylema was the main component of As enrichment, showing As compartmentation. However, such compartmentation did not effectively reduce As toxicity to plant cell metabolism. Additions of phosphorus significantly decreased the accumulation of As in various components, in order of cytochylema>cytoderm>organelle, but had little effect on the ratios of As in subcellular components to total As.关键词
三七/砷/μ-SRXRF/亚细胞组分Key words
Panax notoginseng/arsenic speciation/synchrotron radiation X-ray fluorescence(μ-SRXRF)/subcellular component分类
资源环境引用本文复制引用
陈璐,米艳华,万小铭,尹本林,袁志伟,和丽忠..砷胁迫下磷对三七砷的微区及亚细胞组织分布特征的影响[J].农业环境科学学报,2016,35(4):654-660,7.基金项目
云南省科技计划青年项目（2014FD063）；国家自然科学基金项目（21267024）；云南省创新人才培养计划项目 （）
