Nature and effect of <i>Alternaria</i> spp. complex from wheat grain on germination and disease transmission
- Autores
- Perelló, Analía Edith; Larrán, Silvina
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Diseases caused by Alternaria sp. are among the most common diseases of crops throughout the world. Alternaria sp. is a common component of the flora of wheat seed. Although isolation of Alternaria sp. from wheat (Triticum aestivum) seed has been reported in Argentina, development of the Alternaria blight in plants from infected seeds has not been demonstrated experimentally. Seed transmission of strains belonging to Alternaria tenuissima, A. alternata, A. infectoria, A. triticina, A. chlamydospora and related genera like Embellisia and Ulocladium sp. on wheat were investigated in the Argentinean growing area, on wheat cultivars Klein Escorpión and Buck Poncho. A. tenuissima was the dominant fungus in black pointed kernels. Transmission of all 42 seed-borne members of Alternaria complex from seeds to seedlings artificially inoculated was detected by trays seedling symptoms test. Among the fungi tested most isolates of Alternaria, Embellisia sp. and Ulocladium sp. produced distinct seed rot and seedling infection symptoms. This confirmed the seed-borne nature of these fungi. In each wheat cultivar tested inoculated seeds appreciably reduced their germination. The emerging coleoptile is externally infected by hyphal growth from the infected pericarp. Typical disease symptoms on the seedlings were exhibited. Recovery of the fungi from asymptomatic coleoptiles was also possible. Transmission efficiency varies with wheat cultivar and ranges from 0 to 92%. These results suggest that infected seed and seed transmission represents a mode of primary source of infection from which these microorganisms can start epidemics to the wheat crop and for dispersal of fungal strains to new areas.
Centro de Investigaciones en Fitopatología
Facultad de Ciencias Agrarias y Forestales - Materia
-
Biología
Ciencias Naturales
Ciencias Exactas
Wheat
Alternaria
Seedborne - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/97646
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Nature and effect of <i>Alternaria</i> spp. complex from wheat grain on germination and disease transmissionPerelló, Analía EdithLarrán, SilvinaBiologíaCiencias NaturalesCiencias ExactasWheatAlternariaSeedborneDiseases caused by <i>Alternaria</i> sp. are among the most common diseases of crops throughout the world. <i>Alternaria</i> sp. is a common component of the flora of wheat seed. Although isolation of <i>Alternaria</i> sp. from wheat (<i>Triticum aestivum</i>) seed has been reported in Argentina, development of the Alternaria blight in plants from infected seeds has not been demonstrated experimentally. Seed transmission of strains belonging to <i>Alternaria tenuissima, A. alternata, A. infectoria, A. triticina, A. chlamydospora</i> and related genera like <i>Embellisia</i> and <i>Ulocladium</i> sp. on wheat were investigated in the Argentinean growing area, on wheat cultivars Klein Escorpión and Buck Poncho. <i>A. tenuissima</i> was the dominant fungus in black pointed kernels. Transmission of all 42 seed-borne members of <i>Alternaria</i> complex from seeds to seedlings artificially inoculated was detected by trays seedling symptoms test. Among the fungi tested most isolates of <i>Alternaria, Embellisia</i> sp. and <i>Ulocladium</i> sp. produced distinct seed rot and seedling infection symptoms. This confirmed the seed-borne nature of these fungi. In each wheat cultivar tested inoculated seeds appreciably reduced their germination. The emerging coleoptile is externally infected by hyphal growth from the infected pericarp. Typical disease symptoms on the seedlings were exhibited. Recovery of the fungi from asymptomatic coleoptiles was also possible. Transmission efficiency varies with wheat cultivar and ranges from 0 to 92%. These results suggest that infected seed and seed transmission represents a mode of primary source of infection from which these microorganisms can start epidemics to the wheat crop and for dispersal of fungal strains to new areas.Centro de Investigaciones en FitopatologíaFacultad de Ciencias Agrarias y Forestales2013-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1817-1824http://sedici.unlp.edu.ar/handle/10915/97646enginfo:eu-repo/semantics/altIdentifier/url/https://www.pakbs.org/pjbot/PDFs/45(5)/49.pdfinfo:eu-repo/semantics/altIdentifier/issn/2070-3368info:eu-repo/semantics/altIdentifier/hdl/11336/76816info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:20:25Zoai:sedici.unlp.edu.ar:10915/97646Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:20:26.04SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Nature and effect of <i>Alternaria</i> spp. complex from wheat grain on germination and disease transmission |
title |
Nature and effect of <i>Alternaria</i> spp. complex from wheat grain on germination and disease transmission |
spellingShingle |
Nature and effect of <i>Alternaria</i> spp. complex from wheat grain on germination and disease transmission Perelló, Analía Edith Biología Ciencias Naturales Ciencias Exactas Wheat Alternaria Seedborne |
title_short |
Nature and effect of <i>Alternaria</i> spp. complex from wheat grain on germination and disease transmission |
title_full |
Nature and effect of <i>Alternaria</i> spp. complex from wheat grain on germination and disease transmission |
title_fullStr |
Nature and effect of <i>Alternaria</i> spp. complex from wheat grain on germination and disease transmission |
title_full_unstemmed |
Nature and effect of <i>Alternaria</i> spp. complex from wheat grain on germination and disease transmission |
title_sort |
Nature and effect of <i>Alternaria</i> spp. complex from wheat grain on germination and disease transmission |
dc.creator.none.fl_str_mv |
Perelló, Analía Edith Larrán, Silvina |
author |
Perelló, Analía Edith |
author_facet |
Perelló, Analía Edith Larrán, Silvina |
author_role |
author |
author2 |
Larrán, Silvina |
author2_role |
author |
dc.subject.none.fl_str_mv |
Biología Ciencias Naturales Ciencias Exactas Wheat Alternaria Seedborne |
topic |
Biología Ciencias Naturales Ciencias Exactas Wheat Alternaria Seedborne |
dc.description.none.fl_txt_mv |
Diseases caused by <i>Alternaria</i> sp. are among the most common diseases of crops throughout the world. <i>Alternaria</i> sp. is a common component of the flora of wheat seed. Although isolation of <i>Alternaria</i> sp. from wheat (<i>Triticum aestivum</i>) seed has been reported in Argentina, development of the Alternaria blight in plants from infected seeds has not been demonstrated experimentally. Seed transmission of strains belonging to <i>Alternaria tenuissima, A. alternata, A. infectoria, A. triticina, A. chlamydospora</i> and related genera like <i>Embellisia</i> and <i>Ulocladium</i> sp. on wheat were investigated in the Argentinean growing area, on wheat cultivars Klein Escorpión and Buck Poncho. <i>A. tenuissima</i> was the dominant fungus in black pointed kernels. Transmission of all 42 seed-borne members of <i>Alternaria</i> complex from seeds to seedlings artificially inoculated was detected by trays seedling symptoms test. Among the fungi tested most isolates of <i>Alternaria, Embellisia</i> sp. and <i>Ulocladium</i> sp. produced distinct seed rot and seedling infection symptoms. This confirmed the seed-borne nature of these fungi. In each wheat cultivar tested inoculated seeds appreciably reduced their germination. The emerging coleoptile is externally infected by hyphal growth from the infected pericarp. Typical disease symptoms on the seedlings were exhibited. Recovery of the fungi from asymptomatic coleoptiles was also possible. Transmission efficiency varies with wheat cultivar and ranges from 0 to 92%. These results suggest that infected seed and seed transmission represents a mode of primary source of infection from which these microorganisms can start epidemics to the wheat crop and for dispersal of fungal strains to new areas. Centro de Investigaciones en Fitopatología Facultad de Ciencias Agrarias y Forestales |
description |
Diseases caused by <i>Alternaria</i> sp. are among the most common diseases of crops throughout the world. <i>Alternaria</i> sp. is a common component of the flora of wheat seed. Although isolation of <i>Alternaria</i> sp. from wheat (<i>Triticum aestivum</i>) seed has been reported in Argentina, development of the Alternaria blight in plants from infected seeds has not been demonstrated experimentally. Seed transmission of strains belonging to <i>Alternaria tenuissima, A. alternata, A. infectoria, A. triticina, A. chlamydospora</i> and related genera like <i>Embellisia</i> and <i>Ulocladium</i> sp. on wheat were investigated in the Argentinean growing area, on wheat cultivars Klein Escorpión and Buck Poncho. <i>A. tenuissima</i> was the dominant fungus in black pointed kernels. Transmission of all 42 seed-borne members of <i>Alternaria</i> complex from seeds to seedlings artificially inoculated was detected by trays seedling symptoms test. Among the fungi tested most isolates of <i>Alternaria, Embellisia</i> sp. and <i>Ulocladium</i> sp. produced distinct seed rot and seedling infection symptoms. This confirmed the seed-borne nature of these fungi. In each wheat cultivar tested inoculated seeds appreciably reduced their germination. The emerging coleoptile is externally infected by hyphal growth from the infected pericarp. Typical disease symptoms on the seedlings were exhibited. Recovery of the fungi from asymptomatic coleoptiles was also possible. Transmission efficiency varies with wheat cultivar and ranges from 0 to 92%. These results suggest that infected seed and seed transmission represents a mode of primary source of infection from which these microorganisms can start epidemics to the wheat crop and for dispersal of fungal strains to new areas. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-09 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/97646 |
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http://sedici.unlp.edu.ar/handle/10915/97646 |
dc.language.none.fl_str_mv |
eng |
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eng |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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