Mycobiology

The Korean Society of Mycology (한국균학회)
권호 표지
DOI QR코드

DOI QR Code

Relationship between Water Content and Osmotic Potential of Lentinula edodes

  • Koo, Chang-Duck (Department of Forest Science, Chungbuk National University) ;
  • Cho, Sun-Young (Department of Forest Science, Chungbuk National University)
  • Published : 2008.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

This study was conducted to understand how osmotic potentials in Lentinula edodes tissues are related to water contents and how they change while a mushroom matures. Water content and osmotic potential of L. edodes mushroom tissues from log cultivation and sawdust cultivation were measured and the relationships were analyzed. Osmotic potentials in the tissues were exponentially proportional to their moisture contents and there were strain differences in the potentials. Strain 290 has lower osmotic potential than strain 302, in the tissues at the same water content. As the mushrooms mature, tissue water content maintained ca 94% in head tissues and ca 90% in gills, but significantly decreased from ca 90% to 82% in the stipe tissues. Osmotic potential changes were similar to the tissue water content changes as the mushrooms mature. While osmotic potentials maintained -0.25 to -0.45 MPa in head and gill tissues, the potentials greatly decreased from -0.65 to -1.33 MPa in stipe tissues. Our results show that osmotic potentials in L. edodes tissues are exponentially proportional to tissue water contents, that strains differ in osmotic potential related to water, and that stipe tissues can still have nutritional value when they mature.

Keywords

References

  1. Beecher, T. M., Magan, N. and Burton, K. S. 2000. Osmotic/matric potential affects mycelial growth and endogenous reserves in Agricus bisporus. Mushroom Sci. 15:455-462
  2. Bisko, N. A., Bilay, V. T., Babitskaya, V. G., Scherba, V. V., Mitropolskaya, N. Y. and Puchkova, T. A. 2004. Biologically active substances from mycelia of Ganoderma lucidum and Lentinula edodes. Mushroom Sci. 16:619-623
  3. Burton, K., Sreenivasaprasad, S., Eastwood, D., Rama, T., Beecher, T. and Molloy, S. 2000. The science of mushroom quality. Mushroom Sci. 15:715-720
  4. Deacon, J. W. 2005. Fungal Biology. Blackwell Scientific Publication. London
  5. Hurukawa, H. 1992. Mushroom Science. Kyurits Press Co. Tokyo
  6. Ikekawa, T. 2001. Beneficial effects of edible and medicinal mushrooms on health care. Int. J. Med. Mushrooms 3:291-298
  7. Jung, B. H., Kim, E. G. and Lee, S. Y. 2003. An analysis of Korean consumer and preferences for oak-mushroom. Kor. J. Forest Econ. 11:15-22
  8. Kang, C. Y., Min, K. T., Kim, Y. J. and You, C. H. 2005. Present situation and issues of mushroom industry. Korea Rural Economy Institute. Seoul
  9. Lee, S. M. and Kim, Y. D. 2008. Demand and supply prospect of forest product: chestnut and oak mushroom. Agricultural Prospect 2008. pp. 925-955. Korean Rural Economy Institutue, Seoul
  10. Lelley, J. I. and Vetter, J. 2004. Orthomolecular medicine and mushroom consumption-an attractive aspect for promoting production. Mushroom Sci. 16:637-643
  11. Minato, K. I., Mizuno, M., Kasakami, S., Tatsuoka, S., Denpo, Y., Tokimoto, K. and Tsuchida, H. 2001. Changes in immunomodulating activities and content of antitumor polysaccharides during the growth of two medicinal mushrooms, Lentinus edodes (Berk.) Sing. and Grifola frondosa (Dicks.:Fr.) S.F. Gray. Int. J. Med. Mushrooms 3:1-7
  12. Money, N. P. 1994. Osmotic adjustment and the role of turgor in mycelial fungi. In: The Mycota I. Growth, Differentiation and Sexuality, pp. 67-88. Eds. J. G. H. Wessels and F. Meinhardt. Springer-Verlag, Berlin
  13. Ng, T. B. 2004. Antitumor and immunomodulatory compounds from fungi. In: Handbook of Fungal Biotechnology, pp. 469- 477. Ed. D. K. Arora. Marcel Dekker, Inc. New York
  14. Ryu, S. R. and Koo, C. D. 2005. Spatiotemporal changes of temperature and humidity in Lentinula edodes cultivation sheds. J. Kor. For. Soc. 94:468-475
  15. Yap, A. T. and Ng, M. L. 2001. An improved method for the isolation of lentinan from the edible and medicinal shiitake mushroom, Lentinus edodes (Berk.) Sing. (Agaricomycetideae). Int. J. Med. Mushrooms 3:9-19