Induction of resistance to rice leaf blast by avirulent isolates of Magnaporthe oryzae

• Autor(a) principal: Filippi, Marta Cristina Corsi
• Data de Publicação: 2014
• Outros Autores: Silva, Gisele Barata, Viana, Hérica Fernandes, Silva-Lobo, Valácia Lemes, Côrtes, Márcio Vinicius Carvalho Barros, Prabhu, Anne Sitarama
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista de Ciências Agrárias (Belém. Online)
• Texto Completo: https://ajaes.ufra.edu.br/index.php/ajaes/article/view/1673

Rice blast (Magnaporthe oryzae) disease can cause losses of up to 100% ingrain production. A sustainable management should consider alternative control measures.In the present work, biotic resistance induction to blast disease was studied by comparingdisease severity and quantifying some pathogenesis-related proteins (PRPs). Rice plants ofcultivars Metica-1 and Cica-8 were sprayed with biotic resistance inducers (incompatibleisolates of M. oryzae) 48 h before inoculation with challenging isolates (compatible isolatesof M. oryzae) under greenhouse conditions. For both cultivars, Metica-1 and Cica-8, thearea under the disease progress curve was reduced by more than 80% when plants wereinduced with avirulent isolates of Magnaporthe oryzae. The biotic inducers also promotedan increase in the activity of peroxidase (POX), β-1.3-glucanase (GLU), chitinase (CHI), andphenylalanine ammonia-lyase (PAL). Systemic expression of resistance was also observed.