Mycobiology.  2016 Dec;44(4):338-342. 10.5941/MYCO.2016.44.4.338.

Oxalic Acid from Lentinula edodes Culture Filtrate: Antimicrobial Activity on Phytopathogenic Bacteria and Qualitative and Quantitative Analyses

Affiliations
  • 1Graduate School of Future Convergence Technology, Hankyong National University, Anseong 17579, Korea. kanghw2@hknu.ac.kr
  • 2Division of Biotechnology and Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan 54596, Korea. bsyun@jbnu.ac.kr
  • 3Agricultural Microbiology Division, National Academy of Agricultural Science (NAAS), Rural Development Administration (RDA), Wanju 54875, Korea.
  • 4Institute of Genetic Engineering, Hankyong National University, Anseong 17579, Korea.
  • 5Department of Horticultural Life Science, Hankyong National University, Anseong 17579, Korea.

Abstract

The culture filtrate of Lentinula edodes shows potent antimicrobial activity against the plant pathogenic bacteria Ralstonia solanacearum. Bioassay-guided fractionation was conducted using Diaion HP-20 column chromatography, and the insoluble active compound was not adsorbed on the resin. Further fractionation by high-performance liquid chromatography (HPLC) suggested that the active compounds were organic acids. Nine organic acids were detected in the culture filtrate of L. edodes; oxalic acid was the major component and exhibited antibacterial activity against nine different phytopathogenic bacteria. Quantitative analysis by HPLC revealed that the content of oxalic acid was higher in the water extract from spent mushroom substrate than in liquid culture. This suggests that the water extract of spent L. edodes substrate is an eco-friendly control agent for plant diseases.

Keyword

Antibacterial activity; Oxalic acid; Qualitative and quantitative analyses

MeSH Terms

Agaricales
Bacteria*
Chromatography
Chromatography, High Pressure Liquid
Chromatography, Liquid
Lentinula*
Oxalic Acid*
Plant Diseases
Plants
Ralstonia solanacearum
Shiitake Mushrooms*
Water
Oxalic Acid
Water
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