Distribution Characteristics of Arsenic in Medicinal Plants Panax notoginseng′s Taproots Tissue and Subcellular Components
? These authors contributed equally to this paper
Received date: 2014-07-16
Accepted date: 2014-12-23
Online published: 2015-10-09
We used synchrotron radiation X-ray fluorescence (SRXRF) and subcellular distribution research methods to study the characteristics of arsenic (As) in roots of Panax notoginseng and subcellular distribution. Arsenic distributed on the root epidermis of P. notoginseng and had a tendency to migrate to vascular bundle. Cytoplasmic supernatant represented the mainly concentration of subcellular components, and the cytoplasmic supernatant arsenic content of 20 mg·L-1 was 200 times of CK. We analyzed the quadratic regression equation of arsenic content in subcellular constituents of P. notoginseng taproots and As concentrations in nutrient solution and found a direct relationship between As content in the subcellular constituents and the environment. The proportion of each constituent was in the order of cytoplasmic supernatant > cell wall > cytoplasmic organelles. The cytoplasmic supernatant content of 20 mg·L-1 As was the highest, accounting for about 65.78%, and cytoplasmic organelles and the cell wall always maintained low levels of As.
Lu Chen, Yanhua Mi, Xiaoming Wan, Zhiwei Yuan, Benlin Yin, Lizhong He . Distribution Characteristics of Arsenic in Medicinal Plants Panax notoginseng′s Taproots Tissue and Subcellular Components[J]. Chinese Bulletin of Botany, 2015 , 50(5) : 591 -597 . DOI: 10.11983/CBB14131
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