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Identification of Aecial Host Ranges of Four Korean Gymnosporangium Species Based on the Artificial Inoculation with Teliospores Obtained from Various Forms of Telia

  • Yun, Hye-Young (Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University) ;
  • Lee, Seung-Kyu (Korea Forest Research Institute) ;
  • Lee, Kyung-Joon (Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University)
  • Published : 2005.12.01

Abstract

The objectives of this study were to identify the aecial host ranges of four Korean Gymnosporangium species, G. asiaticum, G. cornutum, Gjaponicum and Gyamadae, and to verify the morphological characteristics of telia as diagnostic keys to the species. Thirteen Korean Rosaceous woody species were artificially inoculated with teliospores obtained from Juniperus species. There was high specificity between telial and aecial hosts and the fungal species, providing the first experimental proof on host alternation of these rust fungi in Korea. Telia on the witches' broom and on the small galls were identified as new telial characteristics in G asiaticum and in G. yamadae, respectively. Aecial hosts of G. asiaticum and G. yamadae showed varying responses in their susceptibility and in the days required for formation and duration of spermogonia and aecia after inoculation. Four telial host species in Juniperus were confirmed for the first time in Korea, which include J. chinensis var. kaizuka, J. chinensis var. horizontalis and J. chinensis var. globosa for G. asiaticum; and J. chinensis var. kaizuka for G. yamadae.

Keywords

References

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