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| Effects of phosphorus additions on micro-and sub-cellular distribution of As in Panax notoginseng under As stresses |
| Received:November 15, 2015 |
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| KeyWord:Panax notoginseng;arsenic speciation;synchrotron radiation X-ray fluorescence(μ-SRXRF);subcellular component |
| Author Name | Affiliation | E-mail | | CHEN Lu | Agri-Food Quality Standard and Testing Technology Institute, Yunnan Academy of Agricultural Sciences, Kunming 650221, China | | | MI Yan-hua | Agri-Food Quality Standard and Testing Technology Institute, Yunnan Academy of Agricultural Sciences, Kunming 650221, China | zhoumiqu@163.com | | WAN Xiao-ming | Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China | | | YIN Ben-lin | Agri-Food Quality Standard and Testing Technology Institute, Yunnan Academy of Agricultural Sciences, Kunming 650221, China | | | YUAN Zhi-wei | The Second Affiliated Hospital of Kunming Medical University, Kunming 650101, China | | | HE Li-zhong | Agri-Food Quality Standard and Testing Technology Institute, Yunnan Academy of Agricultural Sciences, Kunming 650221, China | |
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| 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 distribution 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. |
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