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Reappraisal of the genus Alternariaster (Dothideomycetes)
Alternariaster was erected in 2007 to accommodate Alternaria helianthi, a fungal species known to cause leaf spots on Helianthus annuus (sunflower). It was segregated from Alternaria based on conidial morphology. Recently an unknown alternaria-like dematiaceous fungus was found associated with leaf...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Naturalis Biodiversity Center & Centraalbureau voor Schimmelcultures
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3904054/ https://www.ncbi.nlm.nih.gov/pubmed/24761036 http://dx.doi.org/10.3767/003158513X669030 |
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author | Alves, J.L. Woudenberg, J.H.C. Duarte, L.L. Crous, P.W. Barreto, R.W. |
author_facet | Alves, J.L. Woudenberg, J.H.C. Duarte, L.L. Crous, P.W. Barreto, R.W. |
author_sort | Alves, J.L. |
collection | PubMed |
description | Alternariaster was erected in 2007 to accommodate Alternaria helianthi, a fungal species known to cause leaf spots on Helianthus annuus (sunflower). It was segregated from Alternaria based on conidial morphology. Recently an unknown alternaria-like dematiaceous fungus was found associated with leaf spots on Bidens sulphurea (yellow cosmos) in Brazil. Based on a multi-gene phylogeny of parts of the ITS and LSU genes, this fungus was placed within the Leptosphaeriaceae with Alternariaster helianthi as its closest neighbour. Additional genes sequenced, RPB2 and GAPDH, confirmed this close relationship. The fungus on B. sulphurea has smaller conidia, 50–97.5 × 12.5–20 μm, compared to Al. helianthi, 80–160 × 18–30 μm, and lacks oblique or transverse septa which can be present in Al. helianthi. Pathogenicity studies on 18 plant species belonging to the Compositae showed that the B. sulphurea fungus only infected B. sulphurea, whereas Al. helianthi infected H. annuus and Galinsoga quadriradiata, a yet unreported host of Al. helianthi. The fungus causing disease on B. sulphurea is hence closely related but phylogenetically, morphologically and pathologically distinct from Al. helianthi, and therefore newly described as Alternariaster bidentis. The collection of a second species in the genus Alternariaster and the multigene phylogenetic analysis of these two species, confirmed Alternariaster to be a well-delimited genus in the Leptosphaeriaceae rather than the Pleosporaceae, to which Alternaria belongs. |
format | Online Article Text |
id | pubmed-3904054 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Naturalis Biodiversity Center & Centraalbureau voor Schimmelcultures |
record_format | MEDLINE/PubMed |
spelling | pubmed-39040542014-04-23 Reappraisal of the genus Alternariaster (Dothideomycetes) Alves, J.L. Woudenberg, J.H.C. Duarte, L.L. Crous, P.W. Barreto, R.W. Persoonia Research Article Alternariaster was erected in 2007 to accommodate Alternaria helianthi, a fungal species known to cause leaf spots on Helianthus annuus (sunflower). It was segregated from Alternaria based on conidial morphology. Recently an unknown alternaria-like dematiaceous fungus was found associated with leaf spots on Bidens sulphurea (yellow cosmos) in Brazil. Based on a multi-gene phylogeny of parts of the ITS and LSU genes, this fungus was placed within the Leptosphaeriaceae with Alternariaster helianthi as its closest neighbour. Additional genes sequenced, RPB2 and GAPDH, confirmed this close relationship. The fungus on B. sulphurea has smaller conidia, 50–97.5 × 12.5–20 μm, compared to Al. helianthi, 80–160 × 18–30 μm, and lacks oblique or transverse septa which can be present in Al. helianthi. Pathogenicity studies on 18 plant species belonging to the Compositae showed that the B. sulphurea fungus only infected B. sulphurea, whereas Al. helianthi infected H. annuus and Galinsoga quadriradiata, a yet unreported host of Al. helianthi. The fungus causing disease on B. sulphurea is hence closely related but phylogenetically, morphologically and pathologically distinct from Al. helianthi, and therefore newly described as Alternariaster bidentis. The collection of a second species in the genus Alternariaster and the multigene phylogenetic analysis of these two species, confirmed Alternariaster to be a well-delimited genus in the Leptosphaeriaceae rather than the Pleosporaceae, to which Alternaria belongs. Naturalis Biodiversity Center & Centraalbureau voor Schimmelcultures 2013-06-04 2013-12 /pmc/articles/PMC3904054/ /pubmed/24761036 http://dx.doi.org/10.3767/003158513X669030 Text en © 2013 Naturalis Biodiversity Center & Centraalbureau voor Schimmelcultures http://creativecommons.org/licenses/by-nc-nd/3.0/legalcode You are free to share - to copy, distribute and transmit the work, under the following conditions: Attribution: You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). Non-commercial: You may not use this work for commercial purposes. No derivative works: You may not alter, transform, or build upon this work. For any reuse or distribution, you must make clear to others the license terms of this work, which can be found at http://creativecommons.org/licenses/by-nc-nd/3.0/legalcode. Any of the above conditions can be waived if you get permission from the copyright holder. Nothing in this license impairs or restricts the author’s moral rights. |
spellingShingle | Research Article Alves, J.L. Woudenberg, J.H.C. Duarte, L.L. Crous, P.W. Barreto, R.W. Reappraisal of the genus Alternariaster (Dothideomycetes) |
title | Reappraisal of the genus Alternariaster (Dothideomycetes) |
title_full | Reappraisal of the genus Alternariaster (Dothideomycetes) |
title_fullStr | Reappraisal of the genus Alternariaster (Dothideomycetes) |
title_full_unstemmed | Reappraisal of the genus Alternariaster (Dothideomycetes) |
title_short | Reappraisal of the genus Alternariaster (Dothideomycetes) |
title_sort | reappraisal of the genus alternariaster (dothideomycetes) |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3904054/ https://www.ncbi.nlm.nih.gov/pubmed/24761036 http://dx.doi.org/10.3767/003158513X669030 |
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