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Shivasia gen. nov. for the Australasian smut Ustilago solida that historically shifted through five different genera.

Lutz M, Vánky K, Piątek M - IMA Fungus (2012)

Bottom Line: Ustilago solida has previously been included in five different genera (Ustilago, Urocystis, Sorosporium, Cintractia, and Tolyposporium), however, molecular analyses revealed that this smut does not belong to any of these genera and represents a distinct ustilaginalean lineage.The description of Shivasia increases the number of endemic smut genera in Australasia to ten.Compared to all other continents the number of endemic smut genera is exceptionally high, which may point at fast evolving characters and/or may be caused by the regional history, including the long-term geographic isolation of Australasia.

View Article: PubMed Central - PubMed

Affiliation: Evolutionäre Ökologie der Pflanzen, Institut für Evolution und Ökologie, University of Tübingen, Auf der Morgenstelle 1, D-72076 Tübingen, Germany;

ABSTRACT
The generic position of the enigmatic smut fungus Ustilago solida is evaluated applying molecular phylogenetic analyses using ITS and LSU rDNA sequences as well as light and scanning electron microscopical investigations of several collections of this species. Ustilago solida has previously been included in five different genera (Ustilago, Urocystis, Sorosporium, Cintractia, and Tolyposporium), however, molecular analyses revealed that this smut does not belong to any of these genera and represents a distinct ustilaginalean lineage. The closest known phylogenetic relative of Ustilago solida is Heterotolyposporium lepidospermatis, the type species of the monotypic genus Heterotolyposporium. Both smuts differ considerably in both LSU sequences and in several morphological traits, such as the structure of sori and the characteristics of spore balls. Accordingly, the new genus Shivasia is described to accommodate Ustilago solida. This smut infects different Schoenus species (Cyperaceae) in Australia and New Zealand. The description of Shivasia increases the number of endemic smut genera in Australasia to ten. Compared to all other continents the number of endemic smut genera is exceptionally high, which may point at fast evolving characters and/or may be caused by the regional history, including the long-term geographic isolation of Australasia.

No MeSH data available.


Global distribution of Shivasia solida.
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Figure 5: Global distribution of Shivasia solida.

Mentions: Distribution: The genus and species are restricted to south-eastern Australasia: south-east Australia, including Tasmania, and north-west New Zealand (Fig. 5, based on the specimens included in Table 1 as well as in Vánky & McKenzie 2002, and Vánky & Shivas 2008).


Shivasia gen. nov. for the Australasian smut Ustilago solida that historically shifted through five different genera.

Lutz M, Vánky K, Piątek M - IMA Fungus (2012)

Global distribution of Shivasia solida.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3539317&req=5

Figure 5: Global distribution of Shivasia solida.
Mentions: Distribution: The genus and species are restricted to south-eastern Australasia: south-east Australia, including Tasmania, and north-west New Zealand (Fig. 5, based on the specimens included in Table 1 as well as in Vánky & McKenzie 2002, and Vánky & Shivas 2008).

Bottom Line: Ustilago solida has previously been included in five different genera (Ustilago, Urocystis, Sorosporium, Cintractia, and Tolyposporium), however, molecular analyses revealed that this smut does not belong to any of these genera and represents a distinct ustilaginalean lineage.The description of Shivasia increases the number of endemic smut genera in Australasia to ten.Compared to all other continents the number of endemic smut genera is exceptionally high, which may point at fast evolving characters and/or may be caused by the regional history, including the long-term geographic isolation of Australasia.

View Article: PubMed Central - PubMed

Affiliation: Evolutionäre Ökologie der Pflanzen, Institut für Evolution und Ökologie, University of Tübingen, Auf der Morgenstelle 1, D-72076 Tübingen, Germany;

ABSTRACT
The generic position of the enigmatic smut fungus Ustilago solida is evaluated applying molecular phylogenetic analyses using ITS and LSU rDNA sequences as well as light and scanning electron microscopical investigations of several collections of this species. Ustilago solida has previously been included in five different genera (Ustilago, Urocystis, Sorosporium, Cintractia, and Tolyposporium), however, molecular analyses revealed that this smut does not belong to any of these genera and represents a distinct ustilaginalean lineage. The closest known phylogenetic relative of Ustilago solida is Heterotolyposporium lepidospermatis, the type species of the monotypic genus Heterotolyposporium. Both smuts differ considerably in both LSU sequences and in several morphological traits, such as the structure of sori and the characteristics of spore balls. Accordingly, the new genus Shivasia is described to accommodate Ustilago solida. This smut infects different Schoenus species (Cyperaceae) in Australia and New Zealand. The description of Shivasia increases the number of endemic smut genera in Australasia to ten. Compared to all other continents the number of endemic smut genera is exceptionally high, which may point at fast evolving characters and/or may be caused by the regional history, including the long-term geographic isolation of Australasia.

No MeSH data available.