High diversity of Diaporthe species associated with dieback diseases in China, with twelve new species described

By

Yang, Qin
Fan, Xinlei
Guarnaccia, Vladimiro
Tian, Chengming

Type

Article

Date of Publication

2018

Original Publication

NeoBiota : advancing research on alien species and biological invasions

Volume

39

Pages

97-149

Subjects

Dieback , DNA phylogeny , systematics , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sophia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/mycokeys.39.26914

 

Abstract

Diaporthespecies have often been reported as important plant pathogens, saprobes and endophytes on a wide range of plant hosts. Although severalDiaporthespecies have been recorded in China, little is known about species able to infect forest trees. Therefore, extensive surveys were recently conducted in Beijing, Heilongjiang, Jiangsu, Jiangxi, Shaanxi and Zhejiang Provinces. The current results emphasised on 15 species from 42 representative isolates involving 16 host genera using comparisons of DNA sequence data for the nuclear ribosomal internal transcribed spacer (ITS),calmodulin(cal), histone H3 (his3), partial translation elongation factor-1α (tef1) and β-tubulin (tub2) gene regions, as well as their morphological features. Three known species,D.biguttulata,D.eresandD.unshiuensis, were identified. In addition, twelve novel taxa were collected and are described asD.acerigena,D.alangii,D.betulina,D.caryae,D.cercidis,D.chensiensis,D.cinnamomi,D.conica,D.fraxinicola,D.kadsurae,D.padinaandD.ukurunduensis. The current study improves the understanding of species causing diebacks on ecological and economic forest trees and provides useful information for the effective disease management of these hosts in China.