Mycobiology

The Korean Society of Mycology (한국균학회)
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The Effect of Raffaelea quercus-mongolicae Inoculations on the Formation of Non-conductive Sapwood of Quercus mongolica

  • Torii, Masato (Graduate School of Bioresources, Mie University) ;
  • Matsuda, Yosuke (Graduate School of Bioresources, Mie University) ;
  • Seo, Sang Tae (Division of Forest Insect Pests and Disease, Korea Forest Research Institute) ;
  • Kim, Kyung Hee (Division of Forest Insect Pests and Disease, Korea Forest Research Institute) ;
  • Ito, Shin-Ichiro (Mie University) ;
  • Moon, Myung Jin (Department of Biological Sciences, Dankook University) ;
  • Kim, Seong Hwan (Department of Microbiology, Dankook University) ;
  • Yamada, Toshihiro (Graduate School of Agricultural and Life Scieneces, The University of Tokyo)
  • Received : 2014.03.18
  • Accepted : 2014.06.07
  • Published : 2014.06.30
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Abstract

In Korea, mass mortality of Quercus mongolica trees has become obvious since 2004. Raffaelea quercus-mongolicae is believed to be a causal fungus contributing the mortality. To evaluate the pathogenicity of the fungus to the trees, the fungus was multiple- and single-inoculated to the seedlings and twigs of the mature trees, respectively. In both the inoculations, the fungus was reisolated from more than 50% of inoculated twigs and seedlings. In the single inoculations, proportions of the transverse area of non-conductive sapwood at inoculation points and vertical lengths of discoloration expanded from the points were significantly different between the inoculation treatment and the control. In the multiple inoculations, no mortality was confirmed among the seedlings examined. These results showed that R. quercus-mongolicae can colonize sapwood, contribute to sapwood discoloration and disrupt sap flows around inoculation sites of Q. mongolica, although the pathogenicity of the fungus was not proven.

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References

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