An overview of the taxonomy, phylogeny, and typification of nectriaceous fungi in Cosmospora, Acremonium, Fusarium, Stilbella, and Volutella
Identifieur interne : 000428 ( Main/Merge ); précédent : 000427; suivant : 000429An overview of the taxonomy, phylogeny, and typification of nectriaceous fungi in Cosmospora, Acremonium, Fusarium, Stilbella, and Volutella
Auteurs : T. Gr Fenhan ; H.-J. Schroers ; H. I. Nirenberg ; K. A. SeifertSource :
- Studies in Mycology [ 0166-0616 ] ; 2011.
Abstract
A comprehensive phylogenetic reassessment of the ascomycete genus
Url:
DOI: 10.3114/sim.2011.68.04
PubMed: 21523190
PubMed Central: 3065986
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fungi in <italic>Cosmospora</italic>
, <italic>Acremonium</italic>
, <italic>Fusarium</italic>
,
<italic>Stilbella</italic>
, and <italic>Volutella</italic>
</title>
<author><name sortKey="Gr Fenhan, T" sort="Gr Fenhan, T" uniqKey="Gr Fenhan T" first="T." last="Gr Fenhan">T. Gr Fenhan</name>
<affiliation><nlm:aff id="aff1"><italic>Eastern Cereal and Oilseed Research Centre, Biodiversity (Mycology and Botany), 960 Carling Ave., Ottawa, Ontario, K1A 0C6, Canada</italic>
</nlm:aff>
</affiliation>
<affiliation><nlm:aff id="aff4"><italic>Current address</italic>
:<italic>Grain Research Laboratory, Canadian Grain Commission, 1404-303 Main Street, Winnipeg, Manitoba, R3C 3G8, Canada</italic>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Schroers, H J" sort="Schroers, H J" uniqKey="Schroers H" first="H.-J." last="Schroers">H.-J. Schroers</name>
<affiliation><nlm:aff id="aff2"><italic>Agricultural Institute of Slovenia, 1000 Ljubljana, Slovenia</italic>
</nlm:aff>
</affiliation>
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<author><name sortKey="Nirenberg, H I" sort="Nirenberg, H I" uniqKey="Nirenberg H" first="H. I." last="Nirenberg">H. I. Nirenberg</name>
<affiliation><nlm:aff id="aff3"><italic>Julius-Kühn-Institute, Institute for Epidemiology and Pathogen Diagnostics, Königin-Luise-Str. 19, D-14195 Berlin, Germany</italic>
</nlm:aff>
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<author><name sortKey="Seifert, K A" sort="Seifert, K A" uniqKey="Seifert K" first="K. A." last="Seifert">K. A. Seifert</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">An overview of the taxonomy, phylogeny, and typification of nectriaceous
fungi in <italic>Cosmospora</italic>
, <italic>Acremonium</italic>
, <italic>Fusarium</italic>
,
<italic>Stilbella</italic>
, and <italic>Volutella</italic>
</title>
<author><name sortKey="Gr Fenhan, T" sort="Gr Fenhan, T" uniqKey="Gr Fenhan T" first="T." last="Gr Fenhan">T. Gr Fenhan</name>
<affiliation><nlm:aff id="aff1"><italic>Eastern Cereal and Oilseed Research Centre, Biodiversity (Mycology and Botany), 960 Carling Ave., Ottawa, Ontario, K1A 0C6, Canada</italic>
</nlm:aff>
</affiliation>
<affiliation><nlm:aff id="aff4"><italic>Current address</italic>
:<italic>Grain Research Laboratory, Canadian Grain Commission, 1404-303 Main Street, Winnipeg, Manitoba, R3C 3G8, Canada</italic>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Schroers, H J" sort="Schroers, H J" uniqKey="Schroers H" first="H.-J." last="Schroers">H.-J. Schroers</name>
<affiliation><nlm:aff id="aff2"><italic>Agricultural Institute of Slovenia, 1000 Ljubljana, Slovenia</italic>
</nlm:aff>
</affiliation>
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<author><name sortKey="Nirenberg, H I" sort="Nirenberg, H I" uniqKey="Nirenberg H" first="H. I." last="Nirenberg">H. I. Nirenberg</name>
<affiliation><nlm:aff id="aff3"><italic>Julius-Kühn-Institute, Institute for Epidemiology and Pathogen Diagnostics, Königin-Luise-Str. 19, D-14195 Berlin, Germany</italic>
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</affiliation>
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<author><name sortKey="Seifert, K A" sort="Seifert, K A" uniqKey="Seifert K" first="K. A." last="Seifert">K. A. Seifert</name>
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<series><title level="j">Studies in Mycology</title>
<idno type="ISSN">0166-0616</idno>
<idno type="eISSN">1872-9797</idno>
<imprint><date when="2011">2011</date>
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<front><div type="abstract" xml:lang="en"><p>A comprehensive phylogenetic reassessment of the ascomycete genus
<italic>Cosmospora</italic>
(<italic>Hypocreales, Nectriaceae</italic>
) is undertaken using
fresh isolates and historical strains, sequences of two protein encoding
genes, the second largest subunit of RNA polymerase II (<italic>rpb2</italic>
), and a
new phylogenetic marker, the larger subunit of ATP citrate lyase
(<italic>acl1</italic>
). The result is an extensive revision of taxonomic concepts,
typification, and nomenclatural details of many anamorph- and
teleomorph-typified genera of the <italic>Nectriaceae,</italic>
most notably
<italic>Cosmospora</italic>
and <italic>Fusarium.</italic>
The combined phylogenetic analysis
shows that the present concept of <italic>Fusarium</italic>
is not monophyletic and
that the genus divides into two large groups, one basal in the family, the
other terminal, separated by a large group of species classified in genera
such as <italic>Calonectria, Neonectria,</italic>
and <italic>Volutella</italic>
. All accepted
genera received high statistical support in the phylogenetic analyses.
Preliminary polythetic morphological descriptions are presented for each
genus, providing details of perithecia, micro- and/or macro-conidial
synanamorphs, cultural characters, and ecological traits. Eight species are
included in our restricted concept of <italic>Cosmospora</italic>
, two of which have
previously documented teleomorphs and all of which have
<italic>Acremonium</italic>
-like microconidial anamorphs. A key is provided to the
three anamorphic species recognised in <italic>Atractium</italic>
, which is removed
from synonymy with <italic>Fusarium</italic>
and epitypified for two macroconidial
synnematous species and one sporodochial species associated with waterlogged
wood. <italic>Dialonectria</italic>
is recognised as distinct from <italic>Cosmospora</italic>
and two species with teleomorph, macroconidia and microconidia are accepted,
including the new species <italic>D. ullevolea.</italic>
Seven species, one with a
known teleomorph, are classified in <italic>Fusicolla</italic>
, formerly considered a
synonym of <italic>Fusarium</italic>
including members of the <italic>F. aquaeductuum</italic>
and <italic>F. merismoides</italic>
species complex, with several former varieties
raised to species rank. Originally a section of <italic>Nectria</italic>
,
<italic>Macroconia</italic>
is raised to generic rank for five species, all producing
a teleomorph and macroconidial anamorph. A new species of the
<italic>Verticillium</italic>
-like anamorphic genus <italic>Mariannaea</italic>
is described
as <italic>M. samuelsii</italic>
. <italic>Microcera</italic>
is recognised as distinct from
<italic>Fusarium</italic>
and a key is included for four macroconidial species, that
are usually parasites of scale insects, two of them with teleomorphs. The four
accepted species of <italic>Stylonectria</italic>
each produce a teleomorph and micro-
and macroconidial synanamorphs. The <italic>Volutella</italic>
species sampled fall
into three clades. <italic>Pseudonectria</italic>
is accepted for a perithecial and
sporodochial species that occurs on <italic>Buxus</italic>
. <italic>Volutella s. str.</italic>
also includes perithecial and/or sporodochial species and is revised to
include a synnematous species formerly included in <italic>Stilbella</italic>
. The
third <italic>Volutella</italic>
-like clade remains unnamed. All fungi in this paper
are named using a single name system that gives priority to the oldest generic
names and species epithets, irrespective of whether they are originally based
on anamorph or teleomorph structures. The rationale behind this is
discussed.</p>
</div>
</front>
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