Identification of sphaerulina azaleae on korean azalea in korea based on morphological characteristics and multilocus sequence typing

In Young Choi, Young Joon Choi, Kui Jae Lee, Ho Jong Ju, Seong Wan Cho, Hyeon Dong Shin

Research output: Contribution to journalArticlepeer-review

Abstract

From 2008 to 2017, Korean azalea (Rhododendron yedoense f. poukhanense ) showing angular, necrotic leaf spots were found in Jeju and Hongcheon, Korea. The lesions occurred frequently, detracting from the beauty of the glossy green leaves of the plant and causing premature defoliation. Therefore, to identify the fungus associated with the lesions, morphological characterization and molecular phylogenetic analysis of actin (Act), translation elongation factor 1-alpha (EF), internal transcribed spacer (ITS), 28S nrDNA (LSU), and RNA polymerase II encoding the second largest subunit (RPB2) of the two representative isolates were performed. The phylogenetic tree inferred from the neighbor-joining method showed the isolates clustering in the Sphaerulina azaleae group. Therefore, the fungus associated with the angular leaf spots on the Korean azalea was identified as Sphaerulina azaleae.

Original languageEnglish
Pages (from-to)329-335
Number of pages7
JournalKorean Journal of Mycology
Volume48
Issue number3
DOIs
Publication statusPublished - 2020 Sep

Keywords

  • Angular leaf spot
  • Korean azalea
  • Rhododendron yedoense f. poukhanense
  • Sphaerulina azaleae

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science

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