Aggressiveness of Phytophthora cinnamomi in avocado seedlings and effect of pathogen inoculum concentration and substrate flooding periods on root rot and development of the plants
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/0100-29452020352 http://hdl.handle.net/11449/210411 |
Resumo: | The present study evaluated the aggressiveness of Phytophthora cinnamomi isolates and the effect of pathogen inoculum concentration and periods of substrate flooding on root rot and plant development. Twelve pathogen isolates were inoculated on the collar region of avocado seedlings with or without wounding. Only 31.3% of the inoculated plants without wounding developed lesions, compared to 100% of the plants with wounding, while the isolates showed different aggressiveness levels. Avocado seedlings had their substrate inoculated with 0, 0.1% and 1.0% (m/v) wheat seeds colonized by the pathogen per pot, and four periods of 0, 12 and 24 h substrate flooding were produced at fortnightly intervals. The assessed parameters were number of leaves per plant, collar diameter, plant height, leaf area index, visual severity percentage of infected roots, fresh mass (%) of diseased roots and dry mass of shoot and roots. Both pathogen inoculation and substrate flooding caused root rot; however, combination of these two factors produced an additional effect on disease symptoms. Root rot severity was superior to 50% when soilless substrate had 0.1% (m/v)P cinnamomi inoculum and flooded for 12-24 h after inoculation, conditions that can be recommended for pathogenicity and disease control studies using potted avocado plants. |
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Aggressiveness of Phytophthora cinnamomi in avocado seedlings and effect of pathogen inoculum concentration and substrate flooding periods on root rot and development of the plantsPersea americanaroot diseasesoil floodingThe present study evaluated the aggressiveness of Phytophthora cinnamomi isolates and the effect of pathogen inoculum concentration and periods of substrate flooding on root rot and plant development. Twelve pathogen isolates were inoculated on the collar region of avocado seedlings with or without wounding. Only 31.3% of the inoculated plants without wounding developed lesions, compared to 100% of the plants with wounding, while the isolates showed different aggressiveness levels. Avocado seedlings had their substrate inoculated with 0, 0.1% and 1.0% (m/v) wheat seeds colonized by the pathogen per pot, and four periods of 0, 12 and 24 h substrate flooding were produced at fortnightly intervals. The assessed parameters were number of leaves per plant, collar diameter, plant height, leaf area index, visual severity percentage of infected roots, fresh mass (%) of diseased roots and dry mass of shoot and roots. Both pathogen inoculation and substrate flooding caused root rot; however, combination of these two factors produced an additional effect on disease symptoms. Root rot severity was superior to 50% when soilless substrate had 0.1% (m/v)P cinnamomi inoculum and flooded for 12-24 h after inoculation, conditions that can be recommended for pathogenicity and disease control studies using potted avocado plants.Agencia Paulista Tecnol Agronegocios, Polo Reg Ctr Oeste, Bauru, SP, BrazilUniv Estadual Paulista, Fac Ciencias, Campus Bauru, Bauru, SP, BrazilFac Integradas Ourinhos, Ourinhos, SP, BrazilAgencia Paulista Tecnol Agronegocios, Inst Biol, Lab Reg Sorocaba, Sao Paulo, BrazilUniv Estadual Paulista, Fac Ciencias, Campus Bauru, Bauru, SP, BrazilSoc Brasileira FruticulturaAgencia Paulista Tecnol AgronegociosUniversidade Estadual Paulista (Unesp)Fac Integradas OurinhosUniversidade de São Paulo (USP)Fischer, Ivan HermanSampaio, Aloisio Costa [UNESP]Almeida Bertani, Rosemary Marques deLeite Goncalves, Bruno HenriqueFeichtenberger, Eduardo2021-06-25T15:07:43Z2021-06-25T15:07:43Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10application/pdfhttp://dx.doi.org/10.1590/0100-29452020352Revista Brasileira De Fruticultura. Jaboticabal Sp: Soc Brasileira Fruticultura, v. 42, n. 5, 10 p., 2020.0100-2945http://hdl.handle.net/11449/21041110.1590/0100-29452020352S0100-29452020000600401WOS:000582277100001S0100-29452020000600401.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira De Fruticulturainfo:eu-repo/semantics/openAccess2024-06-26T20:10:53Zoai:repositorio.unesp.br:11449/210411Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:29:17.635300Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Aggressiveness of Phytophthora cinnamomi in avocado seedlings and effect of pathogen inoculum concentration and substrate flooding periods on root rot and development of the plants |
title |
Aggressiveness of Phytophthora cinnamomi in avocado seedlings and effect of pathogen inoculum concentration and substrate flooding periods on root rot and development of the plants |
spellingShingle |
Aggressiveness of Phytophthora cinnamomi in avocado seedlings and effect of pathogen inoculum concentration and substrate flooding periods on root rot and development of the plants Fischer, Ivan Herman Persea americana root disease soil flooding |
title_short |
Aggressiveness of Phytophthora cinnamomi in avocado seedlings and effect of pathogen inoculum concentration and substrate flooding periods on root rot and development of the plants |
title_full |
Aggressiveness of Phytophthora cinnamomi in avocado seedlings and effect of pathogen inoculum concentration and substrate flooding periods on root rot and development of the plants |
title_fullStr |
Aggressiveness of Phytophthora cinnamomi in avocado seedlings and effect of pathogen inoculum concentration and substrate flooding periods on root rot and development of the plants |
title_full_unstemmed |
Aggressiveness of Phytophthora cinnamomi in avocado seedlings and effect of pathogen inoculum concentration and substrate flooding periods on root rot and development of the plants |
title_sort |
Aggressiveness of Phytophthora cinnamomi in avocado seedlings and effect of pathogen inoculum concentration and substrate flooding periods on root rot and development of the plants |
author |
Fischer, Ivan Herman |
author_facet |
Fischer, Ivan Herman Sampaio, Aloisio Costa [UNESP] Almeida Bertani, Rosemary Marques de Leite Goncalves, Bruno Henrique Feichtenberger, Eduardo |
author_role |
author |
author2 |
Sampaio, Aloisio Costa [UNESP] Almeida Bertani, Rosemary Marques de Leite Goncalves, Bruno Henrique Feichtenberger, Eduardo |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Agencia Paulista Tecnol Agronegocios Universidade Estadual Paulista (Unesp) Fac Integradas Ourinhos Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Fischer, Ivan Herman Sampaio, Aloisio Costa [UNESP] Almeida Bertani, Rosemary Marques de Leite Goncalves, Bruno Henrique Feichtenberger, Eduardo |
dc.subject.por.fl_str_mv |
Persea americana root disease soil flooding |
topic |
Persea americana root disease soil flooding |
description |
The present study evaluated the aggressiveness of Phytophthora cinnamomi isolates and the effect of pathogen inoculum concentration and periods of substrate flooding on root rot and plant development. Twelve pathogen isolates were inoculated on the collar region of avocado seedlings with or without wounding. Only 31.3% of the inoculated plants without wounding developed lesions, compared to 100% of the plants with wounding, while the isolates showed different aggressiveness levels. Avocado seedlings had their substrate inoculated with 0, 0.1% and 1.0% (m/v) wheat seeds colonized by the pathogen per pot, and four periods of 0, 12 and 24 h substrate flooding were produced at fortnightly intervals. The assessed parameters were number of leaves per plant, collar diameter, plant height, leaf area index, visual severity percentage of infected roots, fresh mass (%) of diseased roots and dry mass of shoot and roots. Both pathogen inoculation and substrate flooding caused root rot; however, combination of these two factors produced an additional effect on disease symptoms. Root rot severity was superior to 50% when soilless substrate had 0.1% (m/v)P cinnamomi inoculum and flooded for 12-24 h after inoculation, conditions that can be recommended for pathogenicity and disease control studies using potted avocado plants. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 2021-06-25T15:07:43Z 2021-06-25T15:07:43Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/0100-29452020352 Revista Brasileira De Fruticultura. Jaboticabal Sp: Soc Brasileira Fruticultura, v. 42, n. 5, 10 p., 2020. 0100-2945 http://hdl.handle.net/11449/210411 10.1590/0100-29452020352 S0100-29452020000600401 WOS:000582277100001 S0100-29452020000600401.pdf |
url |
http://dx.doi.org/10.1590/0100-29452020352 http://hdl.handle.net/11449/210411 |
identifier_str_mv |
Revista Brasileira De Fruticultura. Jaboticabal Sp: Soc Brasileira Fruticultura, v. 42, n. 5, 10 p., 2020. 0100-2945 10.1590/0100-29452020352 S0100-29452020000600401 WOS:000582277100001 S0100-29452020000600401.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Revista Brasileira De Fruticultura |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
10 application/pdf |
dc.publisher.none.fl_str_mv |
Soc Brasileira Fruticultura |
publisher.none.fl_str_mv |
Soc Brasileira Fruticultura |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128366857945088 |