生态环境学报Issue(9)：1576-1581,6.DOI:10.16258/j.cnki.1674-5906.2015.09.023
外源磷素对药用植物三七吸收砷的微区及形态分布特征影响
Effect of Micro and Morphology Distribution of Panax Notoginseng Uptake of Arsenic with Exogenous Phosphorus
摘要
Abstract
Panax Notoginseng is China’s unique rare medicinal plants, its growth environment by region, climate, soil and other conditions, but its only in Wenshan of Yunnan Province have high yield and good quality. However, due to mining, industrial production and other factors, the background value of soil arsenic exceeded, and gradually threatened the normal growth and product quality of P. Notoginseng. Therefore how to reduce arsenic accumulation in P. Notoginseng is urgent. Structurally similar phosphorus and arsenic have similar physical and chemical properties, the use of antagonistic effect of phosphorus and arsenic in the soil, to control soil arsenic hazard effect. This study by synchrotron radiation X-ray fluorescence (μ-SRXRF) method and high performance liquid chromatography-combination of atomic fluorescence spectrometry (HPLC-HG-AFS), from the micro cell tissue area level reveal P. Notoginseng medicinal plants under the effect of exogenous p adsorption of arsenic distribution rule and P. Notoginseng characteristics of arsenic form and content in different parts of the plant, and the change of the biological transport coefficient and the enrichment coefficient of the various parts. The results showed that distribution characteristics of phosphorus and arsenic in the main root of P. Notoginseng fluorescence analysis was the same and description of P. Notoginseng root uptake of phosphorus and arsenic level the same. Addition of exogenous phosphorus treatment can effectively reduce the content of P. Notoginseng parts of the trivalent and pentavalent arsenic, the largest decline of 50%, also can reduce root absorption of arsenic enrichment coefficient. Test adding only pentavalent arsenic, but in all parts of the plant P. Notoginseng trivalent arsenic were detected, indicating that there are a lot of P. Notoginseng body arsenic reduction mechanism. The content of trivalent arsenic stems were higher than pentavalent arsenic, stems are the main places in P. Notoginseng of arsenic reduction mechanism.关键词
三七/砷形态/μ-SRXRFKey words
Panax Notoginseng/Arsenic speciation/synchrotron radiation X-ray fluorescence (μ-SRXRF)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..外源磷素对药用植物三七吸收砷的微区及形态分布特征影响[J].生态环境学报,2015,(9):1576-1581,6.基金项目
国家自然科学基金项目（21267024）；云南省科技计划青年项目（2014FD063）；云南省创新人才培养计划项目 （）
