FOOD SCIENCE ›› 2013, Vol. 34 ›› Issue (21): 183-187.doi: 10.7506/spkx1002-6630-201321038

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Accumulation of Cadmium in Lentinula edodes from Its Compost

HE Xu-kong1,2,BAI Bing1,*,XING Zeng-tao1,ZHAO Xiao-yan1,SHAO Yi1,ZHAO Ming-wen2   

  1. 1. Institute for Agri-food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China;
    2. College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2012-09-02 Revised:2013-10-11 Online:2013-11-15 Published:2013-10-28
  • Contact: BAI Bing1 E-mail:whitebing2@hotmail.com

Abstract:

Objective: To study the potential factors affecting cadmium (Cd) accumulation and to provide a basis for controlling
Cd content in Lentinula edodes. Methods: By adding exogenous Cd to at different levels, we studied the major source of Cd and
the impact of Cd on the morphology and physiology of Lentinula edodes, and examined Cd accumulation in different parts fruit
body of strains Wuxiang, 208 and 808. Results: With increasing Cd concentration between 0.068 mg/kg and 7.87 mg/kg in the
compost, Cd, acetic acid and citric acid contents indicated a gradual increase. Biological efficiency of strains Wuxiang and 208
exhibited an initial increase followed by a decrease, but strain 208 presented lower biological efficiency than the control group. The
accumulation capability of Cd in different strains and their different parts varied depending on Cd concentration. The accumulated
Cd content in gill was 1.40 to 2.17 times more than that in gap, and 1.92 to 5.89 times more than that in stipe. According to Cd
accumulation patterns in different strains, the limited Cd concentrations in the compost were 0.062, 0.040 mg/kg and
0.061 mg/kg for cultivating Lentinula edodes from Strains Wuxiang, 208 and 808, respectively. Conclusion: High concentrations
of Cd can affect the morphology and physiology of Lentinula edodes fruit body. Cd accumulation in Lentinula edodes is correlated
with the strain species, and Cd concentration in the compost and tissues.

Key words: Lentinula edodes, cadmium accumulation, factor

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