Two new species of Colletotrichum (Glomerellaceae, Glomerellales) causing walnut anthracnose in Beijing

By

Zhang, Lin
Yin, Yueqi
Zhao, Lili
Xie, Yuqing
Han, Jing
Zhang, Ying

Type

Article

Date of Publication

2023

Original Publication

Zoosystematics and evolution

Volume

99

Pages

131--152

Subjects

Anthracnose , multi-gene phylogeny , pathogenicity , Walnut

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia Pensoft

Identifiers

DOI: https://doi.org/10.3897/mycokeys.99.106812

 

Abstract

Colletotrichumspecies are plant pathogens, saprobes and endophytes on various plant hosts. It is regarded as one of the 10 most important genera of plant pathogens in the world. Walnut anthracnose is one of the most severe diseases affecting walnut productivity and quality in China. In this study, 162 isolates were obtained from 30 fruits and 65 leaf samples of walnut collected in Beijing, China. Based on morphological characteristics and DNA sequence analyses of the concatenated loci, namely internal transcribed spacer (ITS), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), actin (ACT), chitin synthase 1 (CHS-1) and beta-tubulin (TUB2), these isolates were identified as two novel species ofColletotrichum, i.e.C. juglandicolaandC. peakense. Koch’s postulates indicated that bothC. juglandicolaandC. peakensecould cause anthracnose in walnut.