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Anthracnose Caused by Colletotrichum acutatum in Robinia pseudoacacia

Colletotrichum acutatum에 의한 아까시나무 탄저병

  • Cheon, Wonsu (Department of Bioresource Sciences, Andong National University) ;
  • Jeon, Yongho (Department of Bioresource Sciences, Andong National University)
  • 천원수 (안동대학교 생명자원과학과) ;
  • 전용호 (안동대학교 생명자원과학과)
  • Received : 2015.09.11
  • Accepted : 2016.04.20
  • Published : 2016.06.30

Abstract

During the year 2014, black locust (Robinia pseudoacacia L.) had been observed with dark brown spots on the leaves at Andong, Cheongsong, Mungyeong in Korea. Symptoms initially appeared as small, black lesions on the leaves, and sometimes, the leaves become yellow and ultimately leads to fall off the leaves. The pathogenic fungus grown in potato dextrose agar was white or sometime gray with mycelia in tufts and from which numerous conidia were produced. The conidia were straight and fusiform in shape and measured $8.3-17.2{\times}2.5-4.1{\mu}m$. Internal transcribed spacer (ITS) rRNA sequence analysis for sequence similarity of the ITS region revealed 100% identity with nucleotide sequences for Colletotrichum acutatum. The morphological characteristics, pathogenicity and molecular data have been confirmed that the symptomatic pathogen was C. acutatum. This is the first report of anthracnose caused by C. acutatum on black locust in Korea.

2014년 안동, 문경, 청송의 야산에 있는 아까시나무에서 잎에 검은 반점이 형성되었다. 이 반점은 점차 회갈색 혹은 회색으로 변하며, 병반의 가장자리에는 검은 테두리를 형성한다. 또한 소형 병반에서는 검은 반점뿐만 아니라 노란 halo를 형성하기도 하기도 한다. PDA 배지상에서 균총은 흰색을 띠며 배양기간이 경과함에 따라 오렌지색의 분생포자층을 형성하였다. 분생포자의 모양은 방추형이었으며, 크기는 $8.3-17.2{\times}2.5-4.1{\mu}m$였다. 부착기는 암갈색의 곤봉형으로 크기는 $8.1-12.3{\times}4.1-6.4{\mu}m$였다. ITS 영역의 염기서열을 분석한 결과 C. acutatum과 일치하였다. 아까시나무 잎에 발생한 병징과 병원균의 균학적 특징 및 염기서열 분석을 통해 이 병을 C. acutatum에 의한 아까시나무 탄저병으로 명명하고자 제안한다.

Keywords

References

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