Biological Trace Element Research

, Volume 113, Issue 1, pp 45–51 | Cite as

The effect of Zn on the Zn accumulation and biosynthesis of amino acids in mycelia of Cordyceps sinensis

  • Jia Le
  • Jie Liu
  • Zhou Bo
  • Xu Feng
  • Yu Kexue
  • Wen Fujiang
Original Articles

Abstract

Zinc is an essential trace element in the human body and it participates in various pathways of metabolism. Cordyceps sinensis is a well-known traditional Chinese medicine that contains cordycepin, cordycepic polysaccharides, proteins, vitamins, trace elements, and many other biological active materials. In this study, we cultured C. sinensis in liquid medium containing Zn ions and then analyzed the biomass, the ratios of total Zn accumulation, and the organic Zn content in the mycelia. The results showed that when the media contain 150 mg/L Zn, the biomass of mycelia of C. sinensis reached 10.7 g/L and the Zn content present in the mycelia reached 4875.1 μg/g. The percentage of Zn accumulated in the mycelia was 34.05% of the total Zn in the media, of which the organic Zn accounted for 76.33%. The results also revealed that the content of total amino acid (TAA) and essential amino acid (EAA) in the mycelia were increased substantially TAA and EAA in the Zn-treated mycelia were 11.1% and 15.2% higher, respectively, than that in the mycelia without Zn treatment. These results will be useful for elucidation of the physiological mechanism of Zn effects on the biological metabolism in the mycelia of C. sinensis.

Index Entries

Amino acid, biomass Cordyceps sinensis organic Zn ratio of Zn accumulated 

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Copyright information

© Humana Press Inc. 2006

Authors and Affiliations

  • Jia Le
    • 1
  • Jie Liu
    • 2
  • Zhou Bo
    • 1
  • Xu Feng
    • 1
  • Yu Kexue
    • 1
  • Wen Fujiang
    • 1
  1. 1.College of Life ScienceShandong Agricultural UniversityTaianChina
  2. 2.College of Biological ScienceChina Agricultural UniversityBeijingChina

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