title: [Effect of Tongfeng trace elements nutrient balance agent on growth, physiological characteristics and content of active constituents of Glycyrrhiza uralensis].
abstract: OBJECTIVE
  To investigate the effects of Tongfeng trace elements nutrient balance agent on the various growth indicators, physiological indicators, and the contents of liquiritin and glycyrrhizic acid in one-year old Glycyrrhiza uralensis.
  
  
  METHODS
  The plants of G. uralensis growing in Chifeng of Inner Mongolia and medicinal garden of Beijing University of Chinese Medicine were fertilized for two times, respectively. The photosynthetic physiological indicators were measured by LI-6400 photosynthetic instrument. The pigments and antioxidase activities of the leaves were determined. Then contents of liquiritin and glycyrrhizic acid in the plants were determined by HPLC.
  
  
  RESULTS
  The application of this trace element nutrient balance agent could significantly improve the height, chla and chlb, and the photosynthetic physiology indicator such as P(n), C(i), and G(s). Similarly, it could significantly increase the fresh weight of shoots and dry weight of the roots. Compared with control block (CK), the fertilizer which was diluted by 300 times (T(1)) and 600 times (T(2)) significantly increased the content of glycyrrhizic acid by 24.72% and 20. 23%. There was significant difference between different treatments (P < 0.05).
  
  
  CONCLUSIONS
  The Tongfeng trace elements nutrient balance agent could promote growth, physiology and the content of active constituents of G. uralensis, especially the effect of T(1) was superior to T(2).
authors: School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing 100102, China.
authors: Dan
authors: D
authors: Wang
authors: Chunyang
authors: C
authors: Wan
authors: Wenquan
authors: W
authors: Wang
authors: Bin
authors: B
authors: Gu
authors: Jiajia
authors: J
authors: Li
authors: Wenjie
authors: W
authors: Wang
authors: Songnian
authors: S
authors: Hou
authors: Zhongwen
authors: Z
authors: Han
mesh_terms: D004789:Enzyme Activation / Q000187:drug effects; D005308:Fertilizers; D044950:Flavanones / Q000378:metabolism; D005960:Glucosides / Q000378:metabolism; D029882:Glycyrrhiza uralensis / Q000187:drug effects* / Q000254:growth & development / Q000502:physiology; D019695:Glycyrrhizic Acid / Q000378:metabolism; D010088:Oxidoreductases / Q000378:metabolism; D010788:Photosynthesis / Q000187:drug effects; D014131:Trace Elements / Q000494:pharmacology*
chemical_list: D005308:Fertilizers; D044950:Flavanones; D005960:Glucosides; D014131:Trace Elements; D019695:Glycyrrhizic Acid; D010088:Oxidoreductases; C512196:liquiritin