Erysiphe spp. on Fabaceae from Iran: A new insights into some complex species
Fabaceae , one of the largest flowering plant families, comprises several subfamilies and genera. Fabaceous plant species host a large number of powdery mildew species belonging to the genus Erysiphe . The affiliation of these species to Erysiphe is readily possible, but they represent a morphologic...
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Published in | Mycological progress Vol. 23; no. 1 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer Berlin Heidelberg
01.12.2024
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Fabaceae
, one of the largest flowering plant families, comprises several subfamilies and genera. Fabaceous plant species host a large number of powdery mildew species belonging to the genus
Erysiphe
. The affiliation of these species to
Erysiphe
is readily possible, but they represent a morphologically and taxonomically complicated complex of closely related, morphologically similar species with overlapping traits. Precise morphological examinations along with phylogenetic analyses, including type collections and other representative samples, are needed to solve the complexity of
Erysiphe
spp. on legumes. In this study, we sequenced a number of collections of powdery mildews on
Pisum
,
Lathyrus
,
Vicia
and
Ononis
spp., with a special focus on specimens from Iran, to clarify species delimitations within the
Erysiphe pisi
complex and other
Erysiphe
species complexes on legumes. Sequences retrieved from powdery mildew on
Pisum
and
Ononis
fall into separate, well supported clades. Hence, the original status of
E. cruchetiana
as a species of its own on
Ononis
spp. is reinstated instead of
E. pisi
var
. cruchetiana
. Ten species, viz.,
E. astragali
,
E. bremeri
,
E. caulicola
,
E. cruchetiana
,
E. iranica
,
E. medicaginis
,
E. pisi
,
E. rayssiae
,
E. sesbaniae
and
E. trifoliorum
were confirmed for Iran, redescribed and illustrated on the basis of Iranian collections.
Erysiphe astragali
,
E. bremeri
,
E. coluteae
and
E. crispula
form a genetically little differentiated clade in ITS/LSU analyses, which is referred to as
E. astragali
clade (complex), comparable to the
E. trifoliorum
clade (complex). Based on our results,
E. coluteae
and
E. crispula
are reduced to synonymy with
E. astragali
and
E. sophorae
is considered a synonym of
E. bremeri
. Sequences of the North American
E. intermedia
on
Lupinus
species form a small clade nested within the big
E. astragali
clade. DNA of the holotype of
E. sesbaniae
was sequenced for the first time in this study. To use the sequences obtained from some new collections as reference sequences for phylogenetic-taxonomic purposes, we propose, for the interim, reference sequences for
E. bremeri
,
E. caulicola
,
E. cruchetiana
,
E. pisi
and
E. viciae-unijugae
. |
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ISSN: | 1617-416X 1861-8952 |
DOI: | 10.1007/s11557-024-01945-5 |