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무 탄저병을 일으키는 Colletotrichum속의 종 동정 및 병원성

Identification and Pathogenicity of Colletotrichum Species Causing Anthracnose of Korean Radish (Rhaphanus sativus) in Korea

한국균학회지 2019년 47권 4호 p.393 ~ 406
최효원 ( Choi Hyo-Won ) - 국립농업과학원 작물보호과

김점순 ( Kim Jeom-Soon ) - 국립농업과학원 유해생물팀
홍성기 ( Hong Sung-Kee ) - 국립농업과학원 작물보호과
이영기 ( Lee Young-Kee ) - 국립농업과학원 작물보호과

Abstract


In August 2017, anthracnose symptoms were observed on the petioles and leaf veins of Korean radish (Rhaphanus sativus ) in Hongcheon, Jeongseon, and Pyeongchang of the Gangwon province, Korea. Many grayish to dark-brown spots of 1-2 mm in diameter, appeared on the lower surface and leaf veins of the radish leaves. The spots gradually enlarged and coalesced to form dark-brown irregular lesions. Ten Colletotrichum isolates were obtained from the affected tissues of the Korean radish. Out of them, eight isolates were identified as C. higginsianum and two isolates were identified as C. truncatum based on morphological characteristics and multi-locus molecular phylogenetic analysis using the internal transcribed spacers and intervening 5.8S rDNA (ITS), partial beta-tubulin gene (TUB2), partial actin gene (ACT), and partial chitin synthase-1 gene (CHS1). The pathogenicity test was carried out on wounded and unwounded Korean radish (cv. Siraegimu and Osarimu), and Chinese cabbage (cv. Chuno and Smart) by inoculating with a spore suspension. All isolates except one C. truncatum isolate developed typical symptoms on both wounded and unwounded Korean radish. In Chinese cabbage, only the plants inoculated with C. higginsianum isolates developed symptoms regardless of the wound. This is the first report of anthracnose caused by C. truncatum on Korean radish in Korea.

키워드

Anthracnose; Colletotrichum higginsianum; Colletotrichum truncatum; Korean radish
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