Physiological response and bioaccumulation of Panax notoginseng to cadmium under hydroponic
Received:April 13, 2015  
DOI:10.4268/cjcmm20151501
KeyWord:Panax notoginseng  cadmium stress  physiological response  photosynthetic parameters  enrichment coefficients  transport coefficients
Author NameAffiliationE-mail
LI Zi-wei Kunming Key Laboratory of Sustainable Development and Utilization of Famous-region Drug, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China  
YANG Ye Kunming Key Laboratory of Sustainable Development and Utilization of Famous-region Drug, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China yangyekm@163.com 
CUI Xiu-ming Kunming Key Laboratory of Sustainable Development and Utilization of Famous-region Drug, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China sanqi37@vip.sina.com 
LIAO Pei-ran Kunming Key Laboratory of Sustainable Development and Utilization of Famous-region Drug, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China  
GE Jin Kunming Key Laboratory of Sustainable Development and Utilization of Famous-region Drug, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China  
WANG Cheng-xiao Kunming Key Laboratory of Sustainable Development and Utilization of Famous-region Drug, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China  
YANG Xiao-yan Kunming Key Laboratory of Sustainable Development and Utilization of Famous-region Drug, Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China  
LIU Da-hui Institute of Medicinal Plants, Yunnan Academy of Agriculture Science, Kunming 650231, China  
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Abstract:
      The physiological response and bioaccumulation of 2-year-old Panax notoginseng to cadmium stress was investigated under a hydroponic experiment with different cadmium concentrations(0, 2.5, 5, 10 μmol·L-1). Result showed that low concentration(2.5 μmol·L-1)of cadmium could stimulate the activities of SOD, POD, APX in P. notoginseng, while high concentration(10 μmol·L-1)treatment made activities of antioxidant enzyme descended obviously. But, no matter how high the concentration of cadmium was, the activities of CAT were inhibited. The Pn, Tr, Gs in P. notoginseng decreased gradually with the increase of cadmium concentration, however Ci showed a trend from rise to decline. The enrichment coefficients of different parts in P. notoginseng ranked in the order of hair root >root >rhizome >leaf >stem, and all enrichment coefficients decreased with the increase of concentration of cadmium treatments; while the cadmium content in different parts of P. notoginseng and the transport coefficients rose. To sum up, cadmium could affect antioxidant enzyme system and photosynthetic system of P. notoginseng; P. notoginseng had the ability of cadmium enrichment, so we should plant it in suitable place reduce for reducing the absorption of cadmium; and choose medicinal parts properly to lessen cadmium intake.
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