Growth characteristics, germination, sporulation and pathogenicity of Colletotrichum gloesporioides Penz. isolates obtained from mango (Mangifera indica L.) fruit.
Gutiérrez-Alonso J. G., Nieto-Ángel D., Téliz-Ortiz D., Zavaleta-Mejía E., Vaquera-Huerta H., Martínez-Damián T., Delgadillo-Sánchez F.
Author Affiliation: Programa de Fitopatología, Instituto de Fitosanidad, Colegio de Postgraduados (CP), Carr. México-Texcoco, km 35.5, Montecillo, Edo. de México C.P. 56230, Mexico.
Revista Mexicana de Fitopatología 19 : 90-93
Abstract : Strains of C. gloeosporioides [Glomerella cingulata] from mango cv. Haden fruits affected by anthracnose and collected from the states of Veracruz, Sinaloa, Michoacan, Guerrero and Chiapas, Mexico, were compared for growth, germination, sporulation and pathogenicity. A discriminatory analysis proved the existence of different groups based on germination rate (GR) and pathogenicity tests (percentage severity) on fruit. The Sinaloa isolate showed the highest GR values (6.8% germination/h) and 94% severity. In contrast, the GR of isolate Veracruz 1 was 0.19%, nevertheless it showed a severity of 100% in fruits. The Michoacan isolate showed a similar behaviour as Veracruz 1, with the exception that it caused a severity of only 22%. The isolate from Chiapas had a GR of 3.9% and it caused a severity similar to Michoacan; while Veracruz 2 and Guerrero isolates had a GR of 6.7 and 5.3%, respectively; however they were not pathogenic. This diverse behaviour among the different isolates suggests a high level of genetic variability of C. gloeosporioides.