Defence responses in rice plants in prior and simultaneous applications of Cladosporium sp. during leaf blast suppression

dc.creatorChaibub, Amanda Abdallah
dc.creatorCarvalho, Jacqueline Campos Borba de
dc.creatorSilva, Carlos de Sousa
dc.creatorCollevatti, Rosane Garcia
dc.creatorGoncalves, Fabio José
dc.creatorCortes, Márcio Vinícius de Carvalho Barros
dc.creatorFilippi, Marta Cristina Corsi de
dc.creatorFaria, Fabrícia Paula de
dc.creatorLopes, Douglas Christian Borges
dc.creatorAraújo, Leila Garcês de
dc.description.abstractAn alternative method to control rice blast (Magnaporthe oryzae) is to include biological agent in the disease management strategy. The objective of this study was to assess the leaf blast-suppressing effects of rice phylloplane fungi. One Cladosporium sp. phylloplane fungus was shown to possess biocontrolling traits based on its morphological characteristics and an analysis of its 18S ribosomal DNA. Experiments aimed at determining the optimal time to apply the bioagent and the mechanisms involved in its rice blast-suppressing activities were performed under controlled greenhouse conditions. We used foliar spraying to apply the Cladosporium sp. 48 h prior to applying the pathogen, and we found that this increased the enzymatic activity. Furthermore, in vitro tests performed using isolate C24 showed that it possessed the ability to secrete endoxylanases and endoglucanases. When Cladosporium sp. was applied either prior to or simultaneous with the pathogen, we observed a significant increase in defence enzyme activity, and rice blast was suppressed by 84.0 and 78.6 %, respectively. However, some enzymes showed higher activity at 24 h while others did so at 48 h after the challenge inoculation. Cladosporium sp. is a biological agent that is capable of suppressing rice leaf blast by activating biochemical defence mechanisms in rice plants. It is highly adapted to natural field conditions and should be included in further studies aimed at developing strategies to support ecologically sustainable disease management and reduce environmental pollution by the judicious use of fungicidal sprays.pt_BR
dc.identifier.citationCHAIBUB, Amanda Abdallah et al. Defence responses in rice plants in prior and simultaneous applications of Cladosporium sp. during leaf blast suppression. Environmental Science and Pollution Research International, Berlin, v. 23, p. 21554–21564, 2016. DOI: 10.1007/s11356-016-7379-5. Disponível em: Acesso em: 29 ago. 2023.pt_BR
dc.identifier.issne- 1614-7499
dc.publisher.departmentInstituto de Ciências Biológicas - ICB (RMG)pt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectOryza sativapt_BR
dc.subjectSustainable managementpt_BR
dc.subjectMagnaporthe oryzaept_BR
dc.subjectResistance inductionpt_BR
dc.subjectBiological agentpt_BR
dc.titleDefence responses in rice plants in prior and simultaneous applications of Cladosporium sp. during leaf blast suppressionpt_BR


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