01760naa a2200253 a 450000100080000000500110000800800410001902400440006010000190010424501150012326000090023852009790024765000100122665000120123665000220124865000170127065000230128770000200131070000250133070000170135570000270137270000180139977300890141720031112014-12-18       2014    bl uuuu     u00u1 u    #d7 ahttp://dx.doi.org/10.4322/rca.16732DOI1 aFILIPPI, M. C.  aInduction of resistance to rice leaf blast by avirulent isolates of Magnaporthe oryzae.h[electronic resource]  c2014  aRice blast (Magnaporthe oryzae) disease can cause losses of up to 100% in grain production. A sustainable management should consider alternative control measures. In the present work, biotic resistance induction to blast disease was studied by comparing disease severity and quantifying some pathogenesis-related proteins (PRPs). Rice plants of cultivars Metica-1 and Cica-8 were sprayed with biotic resistance inducers (incompatible isolates of M. oryzae) 48 h before inoculation with challenging isolates (compatible isolates of M. oryzae) under greenhouse conditions. For both cultivars, Metica-1 and Cica-8, the area under the disease progress curve was reduced by more than 80% when plants were induced with avirulent isolates of Magnaporthe oryzae. The biotic inducers also promoted an increase in the activity of peroxidase (POX), β-1.3-glucanase (GLU), chitinase (CHI), and phenylalanine ammonia-lyase (PAL). Systemic expression of resistance was also observed.  aArroz  aBrusone  aDoença de planta  aOryza sativa  aPyricularia oryzae1 aSILVA, G. B. da1 aSILVA-LOBO, V. L. da1 aVIANA, H. F.1 aCORTES, M. V. de C. B.1 aPRABHU, A. S.  tRevista de Ciências Agrárias, Belém, PAgv. 57, n. 4, p. 388-395, out./dez. 2014.