Gamma radiation on phytopathogenic agents of mango cultivar Tommy Atkins.
Alexandre E. R., Oliveira J. de, Oliveira S. M. A. de, Silva J. M. da
Author Affiliation: Universidade Federal Rural de Pernambuco, Departamento de Agronomia, Área de Fitossanidade, Laboratório de Patologia Pós-Colheita, Rua Dom Manoel de Medeiros, s/n, Dois Irmãos, CEP 52.171-900, Recife-PE, Brazil.
Revista Brasileira de Ciências Agrárias 7 : 66-72
Abstract : The purpose of this study was to evaluate the effects of the gamma radiation in vitro on the major phytopathological agents of the mango cultivar Tommy Atkins. The morphophysiological parameters evaluated were mycelial growth, sporulation and aspects of the colonies (color and topographical aspect) of the fungi Colletotrichum gloeosporioides, Alternaria alternata and Fusicoccum parvum after exposure in Petri dishes to the application of 1.0 kGy of gamma radiation with Co60 source. The 1.0 kGy dose was significant enough to inhibit the mycelial growth of C. gloeosporioides and A. alternata, but it stimulated the mycelial growth of F. parvum. Results revealed that the sporulation of the C. gloeosporioides and F. parvum fungi reduced the number of spores after the radiation, however, the A. alternata fungus, when exposed to the radiation, resulted in increase in the number of conidia/mL. Cultural changes were not observed in the fungi colonies studied after exposure to gamma radiation.