@ARTICLE{TreeBASE2Ref20478,
author = {Daniel Paul Lawrence and Philipp B Gannibal and Frank Dugan and Barry M. Pryor},
title = {Characterization of Alternaria isolates from the infectoria species-group and a new taxon from Arrhenatherum, Pseudoalternaria arrhenatheria sp. nov.},
year = {2013},
keywords = {Alternaria, systematics},
doi = {10.1007/s11557-013-0910-x},
url = {http://},
pmid = {},
journal = {Mycological Progress},
volume = {},
number = {},
pages = {},
abstract = {The infectoria species-group within the genus
Alternaria was originally conceived by Simmons in 1993
and was based upon common morphological characteristics
that included the development of conidial chains with primary,
secondary, and tertiary branching resulting in substantial
three-dimensional complexity. These characters can overlap
to varying degrees with numerous taxa in another Alternaria
group, the alternata species-group, making species-group differentiation
difficult. However, members of the infectoria
species-group are also distinguished from other small-spored
Alternaria species based upon colony characteristics that typically
include white or nearly white floccose colonies on
DRYES medium and clumps of sporulation islands on low
sugarmedia such as V8 agar, PCA, and weak PDA. In addition,
the infectoria species-group contains representatives that are
known to produce teleomorphs (Lewia), whereas the members
of the alternata species-group and other Alternaria speciesgroups
are strictly asexual. In this study, an assemblage of
isolates recovered from varied hosts from the west coast of
the United States were examined based upon morphological
characters and compared to previously described members of
the infectoria species-group. These isolates and members of
the infectoria species-group typically produce arachnoid
vegetative hyphae with multiple primary conidiophores,
whereas other small-spored Alternaria species produce primary
conidiophores predominately directly from the agar
surface. Additionally, molecular phylogenetic analyses resolved
these isolates and members of the infectoria speciesgroup
as distinctly nested amongst other sexual taxa in
Allewia (Embellisia anamorph) and Macrospora (Nimbya
anamorph) and phylogenetically distant to asexual lineages
of Alternaria. One taxon among these isolates was novel and
clustered with the asexual A. rosae in a distinct clade basal to
all other members of the infectoria species-group. A new
genus is proposed, Pseudoalternaria gen. nov. and a new
taxon is described, Pseudoalternaria arrhenatheria sp. nov..
Moreover, a second taxon is reclassified, Pseudoalternaria
rosae comb. nov.}
}
Taxa for matrix 42656 of Study 12423
Citation title:
"Characterization of Alternaria isolates from the infectoria species-group and a new taxon from Arrhenatherum, Pseudoalternaria arrhenatheria sp. nov.".
Study name:
"Characterization of Alternaria isolates from the infectoria species-group and a new taxon from Arrhenatherum, Pseudoalternaria arrhenatheria sp. nov.".
This study is part of submission 12423
(Status: Published).
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