Species of Diaporthe (Diaporthaceae, Diaporthales) associated with Alnus nepalensis leaf spot and branch canker diseases in Xizang, China

By

Li, Jieting
Li, Yi
Li, Jiangrong
Jiang, Ning

Type

Article

Date of Publication

2025

Original Publication

MycoKeys

Volume

116

Pages

185--204

Subjects

Alder , molecular phylogeny , novel taxa , plant disease , Sordariomycetes , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.116.142750

 

Abstract

Alnus nepalensis is an important tree species in the Himalayas with significant ecological and economic roles. During disease surveys in Xizang, China, we observed leaf spot and branch canker symptoms on this tree. Fungal isolates associated with these diseases were collected and identified based on morphological characteristics and phylogenetic analysis of ITS, cal, his3, tef1, and tub2 sequences. As a result, Diaporthe alnicolasp. nov. and D. amygdali were identified from the leaf spots, while D. linzhiensis was identified to be associated with the cankered branches. This study identifies pathogenic species from alder trees, providing a foundation for future disease management and forest health research.