Xenodidymella iranica sp. nov. and new hosts of X. glycyrrhizicola in Iran

• Published in: Tropical plant pathology Vol. 47; no. 3; pp. 430 - 441
• Main Authors: Ahmadpour, S. Akram, Mehrabi-Koushki, Mehdi, Farokhinejad, Reza, Asgari, Bita
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01-06-2022; Springer Nature B.V
• Subjects: Biomedical and Life Sciences; Brassica; DNA-directed RNA polymerase; Host plants; Introduced species; Life Sciences; New species; Original Article; Pathogenicity; Pathogens; Phylogeny; Plant diseases; Plant Pathology; Ribosomal DNA; RNA polymerase; RNA polymerase II; Spacer region; Tubulin; Iran; New taxon; Phylogeny; Taxonomy; Didymellaceae; Leaf spot
• ISSN: 1983-2052; 1982-5676; 1983-2052
• DOI: 10.1007/s40858-022-00491-3

The genus
Xenodidymella
includes eight species that are mainly plant pathogens causing different diseases worldwide. During a survey on plant diseases in Khuzestan province in southwestern Iran, seven isolates of
Xenodidymella
were obtained from symptomatic plants, including
Brassica oleracea
var.
capitata
,
Callistemon citrinus
,
Corchorus olitorius
,
Coriandrum sativum
,
Glycyrrhiza lepidota
, and
Ziziphus mauritiana
. A multi-locus phylogenetic analysis based on the internal transcribed spacer regions 1 and 2 including the 5.8S nuclear ribosomal DNA (ITS), partial β-tubulin (
tub2
), and RNA polymerase II second largest subunit (
rpb2
), combined with morphology, was used to identify the isolates. Accordingly, the novel species
Xenodidymella iranica
is introduced and characterized here along with five new hosts for
X
.
glycyrrhizicola
. In pathogenicity tests,
X. iranica
and three strains of
X. glycyrrhizicola
are known as pathogenic on host plants from where they were originally isolated.