Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Identification of Sapstain Fungi on Weathered Wooden Surfaces of Buildings at Jangheung and Jeju Island

  • YUN, Jeonghee (Department of Forest Products & Biotechnology, College of Science Technology, Kookmin University) ;
  • SHIN, Hee Chang (Department of Forest Products & Biotechnology, College of Science Technology, Kookmin University) ;
  • HWANG, Won Joung (Wood Engineering Division, Forest Products and Industry Department, National Institute of Forest Science) ;
  • YOON, Sae-Min (Wood Engineering Division, Forest Products and Industry Department, National Institute of Forest Science) ;
  • KIM, Yeong-Suk (Department of Forest Products & Biotechnology, College of Science Technology, Kookmin University)
  • Received : 2021.07.12
  • Accepted : 2021.10.23
  • Published : 2021.11.25
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Abstract

Recently it is trend to increase wood use as carbon neutral materials, there is recognized to need necessarily durability improvement of wooden building. It is very rare to report existing on the identification of isolates causing discoloration in domestic weathered wooden building used for long period. The objective of this study was identification of fungi that cause discoloration on the exteriors of weathered domestic wooden buildings in the southern part of South Korea. Our findings can be helpful to establish protection technology for weather deterioration of domestic wooden buildings. Wood chip samples presumed to be contaminated with sapstain fungi were collected from the surface of wooden members used in wooden buildings at Jangheung, Jeollanam-do (two locations, #13 and #14), and Jeju Island (two locations, #31 and #33). The growth of microorganisms was confirmed by performing culture tests for the collected samples, and fungi were isolated, purified, and identified. The results indicated that the fungal strains isolated from wooden buildings #13 and #14 at Jangheung, Jeollanam-do, were 99.83% and 100% homologous to Aureobasidium melanogenum, respectively. For wooden building #31 at Jeju Island (two locations), the fungal strain isolated was 100% homologous to A. melanogenum, which is the same species isolated from the wooden buildings at Jangheung. The fungal strain isolated from wooden building #33 (Jeju Island) had 99.83% homology with A. pullulans, which is commonly found in wood degraded by weather or ultraviolet rays. Our findings can be utilized as a basis for establishing protection technology in domestic wooden buildings.

Keywords

Acknowledgement

This study was carried out with the support of the R&D Program for Forest Science Technology (Project No. 2020261B10-2122-AC02 and 2019150B10-2123-0301) provided by the Korea Forest Service (Korea Forestry Promotion Institute).

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