Mycobiology

The Korean Society of Mycology (한국균학회)
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Vegetative Growth and Phylogenetic Relationship of Commercially Cultivated Strains of Pleurotus eryngii based on ITS sequence and RAPD

  • Alam, Nuhu (Department of Biology, University of Incheon) ;
  • Shim, Mi-Ja (Department of Life Science, University of Seoul) ;
  • Lee, Min-Woong (Department of Biology, Dongguk University) ;
  • Shin, Pyung-Gyun (Mushroom Research Division, Department of Herbal Crop Research, National Institute of Horticulture & Herbal Science, RDA) ;
  • Yoo, Young-Bok (Mushroom Research Division, Department of Herbal Crop Research, National Institute of Horticulture & Herbal Science, RDA) ;
  • Lee, Tae-Soo (Department of Biology, University of Incheon)
  • Published : 2009.12.31
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Abstract

Pleurotus eryngii, known as king oyster mushroom has been widely used for nutritional and medicinal purposes. This study was initiated to screen the suitable conditions for mycelial growth and to determine the phylogenetic relationship of the selected strains. Optimal mycelial growth was observed at $30{^{\circ}C}$ and minimum mycelial growth observed at $10{^{\circ}C}$. This mushroom tolerates a broad pH range for mycelial growth, with most favorable growth observed at pH 6. Results also indicated that glucose peptone, yeast malt extract and mushroom complete media were favorable growth media, while Hennerberg and Hoppkins media were unfavorable. Dextrin was the best and xylose the least effective carbon sources. Results revealed that inorganic nitrogen sources were less effective than organic sources for the mycelial growth of P. eryngii. Investigation of genetic diversity is necessary to identify the strains. The ITS region of rDNA were amplified using PCR. The size of the ITS1 and ITS2 regions of rDNA from the different strains varied from 214 to 222 bp and 145 to 236 bp, respectively. The sequence of ITS2 was more variable than that of ITS1, and the 5.8S sequences were identical. A phylogenetic tree based on the ITS region sequences indicated that selected strains could be classified into six clusters. Fourteen IUM and ATCC- 90212 strains were also analyzed by RAPD with 20 arbitrary primers. Fourteen of these primers were efficiently amplified the genomic DNA. The number of amplified bands varied with the primers and strains, with polymorphic fragments in the range from 0.2 to 2.3 kb.

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References

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  3. Extract vol.39, pp.1, 2014, https://doi.org/10.1111/jfbc.12096