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
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/97646

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network_name_str SEDICI (UNLP)
spelling 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
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info:eu-repo/semantics/publishedVersion
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dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/97646
url http://sedici.unlp.edu.ar/handle/10915/97646
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info:eu-repo/semantics/altIdentifier/hdl/11336/76816
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
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1817-1824
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