Increased enzymatic activity in rice leaf blast suppression by crude extract of Epicoccum sp.

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dc.creatorSena, Ana Paula Alves de
dc.creatorChaibub, Amanda Abdallah
dc.creatorCortes, Márcio Vinícius de Carvalho Barros
dc.creatorSilva, Gisele Barata da
dc.creatorLobo, Valacia Lemes da Silva
dc.creatorPrabhu, Anne Sitarama
dc.creatorFilippi, Marta Cristina Corsi de
dc.creatorAraújo, Leila Garcês de
dc.date.accessioned2018-04-16T13:47:46Z
dc.date.available2018-04-16T13:47:46Z
dc.date.issued2013
dc.description.resumoEpicoccum sp. showed in vitro antagonism to the rice pathogens Magnaporthe oryzae, Rhizoctonia solani, Sarocladium oryzae, Monographella albescens and Cochliobolus miyabeanus in dual culture. The colony growth of the rice blast fungus, M. oryzae, was reduced by 42.50%. The lethal doses (LD 50 ) determined based on probit-log dosage response curves at 3 and 6 hours after germination were 393.0 and 326.6 ppm, respectively. The crude extract (600 ppm) reduced appressorial formation by 95.68%. A greenhouse experiment comparing the relative efficiency of conidial suspension and crude extract of Epicoccum sp. in the suppression of leaf blast showed no statistical difference between both application methods. However, the crude extract of Epicoccum sp. (4000 ppm) 48 hours before the application of M. oryzae induced resistance and suppressed leaf blast by 97.6%. Scanning electron microscopy of rice leaves inoculated with crude extract of Epicoccum sp. and challenged with M. oryzae showed appressorial deformation on penetration phase. Peroxidase and β-1,3-glucanase activities increased in plants sprayed with crude extract of Epicoccum sp., 24 hours after the application of the challenger. PAL as well as chitinase activities increased 72 hours after challenge inoculation. Epicoccum sp. was shown to be a potential antagonist and inducer of resistance against M. oryzae.pt_BR
dc.identifier.citationSENA, Ana P. A.; CHAIBUB, Amanda A.; CÔRTES, Márcio V. C. B.; SILVA, Gisele B.; SILVA-LOBO, Valácia L.; PRABHU, Anne S.; FILIPPI, Marta C. C.; Araújo, Leila G. Increased enzymatic activity in rice leaf blast suppression by crude extract of Epicoccum sp. Tropical Plant Pathology, Brasília, v. 38, n. 5, p. 387-397, 2013.pt_BR
dc.identifier.doi10.1590/S1982-56762013005000028
dc.identifier.issn1982-5676
dc.identifier.issne- 1983-2052
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/14498
dc.language.isoengpt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentEscola de Agronomia - EA (RG)pt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectEpicoccum sp.pt_BR
dc.subjectPR proteinspt_BR
dc.subjectMagnaporthe oryzaept_BR
dc.subjectOryza sativapt_BR
dc.subjectAntagonismpt_BR
dc.subjectISRpt_BR
dc.titleIncreased enzymatic activity in rice leaf blast suppression by crude extract of Epicoccum sp.pt_BR
dc.typeArtigopt_BR

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