Effect of Fusarium graminearum and infection index on germination and vigor of maize seeds

Detalhes bibliográficos
Autor(a) principal: Galli,Juliana A
Data de Publicação: 2005
Outros Autores: Fessel,Simone A, Panizzi,Rita C
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Fitopatologia Brasileira
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000500002
Resumo: Pathogens in maize (Zea mays) seeds cause serious problems, such as the loss of their capacity to germinative. The objectives of this study were to identify the optimal period for infection of maize seeds on agar colonized by Fusarium graminearum, when incubated for 4, 8, 16 and 32 h, and to evaluate the effect of the fungus on the germination and vigor of seeds with different infection levels. After the respective incubation periods, the seeds were removed from the culture medium and submitted to the blotter test for 3 min with and without superficial disinfection with 1% solution of sodium hypochlorite. Once the optimal period for seed incubation was identified, seeds from the same sample were again placed on the colonized agar for infection. Germination and vigor tests (accelerated aging and cold test) were performed with a mixture of healthy seeds (placed on PDA medium) and inoculated seeds, resulting in seeds with 0, 20, 40, 60, 80 and 100% rates of infection. The results showed that a period of 32 h was long enough to obtain seeds infected by the pathogen. There were no significant effects of fungal infection on seed germination at any of the infection levels, probably due to the high vigor of the maize seed lot tested. Regarding vigor tests, infection levels differed significantly from the control (0% infection), but there were no significant differences among the infection levels.
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spelling Effect of Fusarium graminearum and infection index on germination and vigor of maize seedsZea maysseed pathologyPathogens in maize (Zea mays) seeds cause serious problems, such as the loss of their capacity to germinative. The objectives of this study were to identify the optimal period for infection of maize seeds on agar colonized by Fusarium graminearum, when incubated for 4, 8, 16 and 32 h, and to evaluate the effect of the fungus on the germination and vigor of seeds with different infection levels. After the respective incubation periods, the seeds were removed from the culture medium and submitted to the blotter test for 3 min with and without superficial disinfection with 1% solution of sodium hypochlorite. Once the optimal period for seed incubation was identified, seeds from the same sample were again placed on the colonized agar for infection. Germination and vigor tests (accelerated aging and cold test) were performed with a mixture of healthy seeds (placed on PDA medium) and inoculated seeds, resulting in seeds with 0, 20, 40, 60, 80 and 100% rates of infection. The results showed that a period of 32 h was long enough to obtain seeds infected by the pathogen. There were no significant effects of fungal infection on seed germination at any of the infection levels, probably due to the high vigor of the maize seed lot tested. Regarding vigor tests, infection levels differed significantly from the control (0% infection), but there were no significant differences among the infection levels.Sociedade Brasileira de Fitopatologia2005-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000500002Fitopatologia Brasileira v.30 n.5 2005reponame:Fitopatologia Brasileirainstname:Sociedade Brasileira de Fitopatologia (SBF)instacron:SBF10.1590/S0100-41582005000500002info:eu-repo/semantics/openAccessGalli,Juliana AFessel,Simone APanizzi,Rita Ceng2005-10-19T00:00:00Zoai:scielo:S0100-41582005000500002Revistahttp://www.scielo.br/fbONGhttps://old.scielo.br/oai/scielo-oai.php||sbf-revista@ufla.br1678-46770100-4158opendoar:2005-10-19T00:00Fitopatologia Brasileira - Sociedade Brasileira de Fitopatologia (SBF)false
dc.title.none.fl_str_mv Effect of Fusarium graminearum and infection index on germination and vigor of maize seeds
title Effect of Fusarium graminearum and infection index on germination and vigor of maize seeds
spellingShingle Effect of Fusarium graminearum and infection index on germination and vigor of maize seeds
Galli,Juliana A
Zea mays
seed pathology
title_short Effect of Fusarium graminearum and infection index on germination and vigor of maize seeds
title_full Effect of Fusarium graminearum and infection index on germination and vigor of maize seeds
title_fullStr Effect of Fusarium graminearum and infection index on germination and vigor of maize seeds
title_full_unstemmed Effect of Fusarium graminearum and infection index on germination and vigor of maize seeds
title_sort Effect of Fusarium graminearum and infection index on germination and vigor of maize seeds
author Galli,Juliana A
author_facet Galli,Juliana A
Fessel,Simone A
Panizzi,Rita C
author_role author
author2 Fessel,Simone A
Panizzi,Rita C
author2_role author
author
dc.contributor.author.fl_str_mv Galli,Juliana A
Fessel,Simone A
Panizzi,Rita C
dc.subject.por.fl_str_mv Zea mays
seed pathology
topic Zea mays
seed pathology
description Pathogens in maize (Zea mays) seeds cause serious problems, such as the loss of their capacity to germinative. The objectives of this study were to identify the optimal period for infection of maize seeds on agar colonized by Fusarium graminearum, when incubated for 4, 8, 16 and 32 h, and to evaluate the effect of the fungus on the germination and vigor of seeds with different infection levels. After the respective incubation periods, the seeds were removed from the culture medium and submitted to the blotter test for 3 min with and without superficial disinfection with 1% solution of sodium hypochlorite. Once the optimal period for seed incubation was identified, seeds from the same sample were again placed on the colonized agar for infection. Germination and vigor tests (accelerated aging and cold test) were performed with a mixture of healthy seeds (placed on PDA medium) and inoculated seeds, resulting in seeds with 0, 20, 40, 60, 80 and 100% rates of infection. The results showed that a period of 32 h was long enough to obtain seeds infected by the pathogen. There were no significant effects of fungal infection on seed germination at any of the infection levels, probably due to the high vigor of the maize seed lot tested. Regarding vigor tests, infection levels differed significantly from the control (0% infection), but there were no significant differences among the infection levels.
publishDate 2005
dc.date.none.fl_str_mv 2005-10-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000500002
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dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0100-41582005000500002
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dc.publisher.none.fl_str_mv Sociedade Brasileira de Fitopatologia
publisher.none.fl_str_mv Sociedade Brasileira de Fitopatologia
dc.source.none.fl_str_mv Fitopatologia Brasileira v.30 n.5 2005
reponame:Fitopatologia Brasileira
instname:Sociedade Brasileira de Fitopatologia (SBF)
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