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학술저널
저자정보
Fuentes-Aragon, Dionicio (Posgrado en Fitopatologia, Campus Montecillo, Colegio de Postgraduados) Juarez-Vazquez, Sandra Berenice (Posgrado en Proteccion Vegetal Universidad Autonoma Chapingo Chapingo) Vargas-Hernandez, Mateo (Posgrado en Proteccion Vegetal Universidad Autonoma Chapingo Chapingo) Silva-Rojas, Hilda Victoria (Posgrado en Recursos Geneticos y Productividad, Produccion de Semillas, Campus Montecillo)
저널정보
한국균학회 Mycobiology Mycobiology 제46권 제2호
발행연도
2018.1
수록면
92 - 100 (9page)

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The filamentous Ascomycota Colletotrichum gloeosporioides sensu lato is a fungus that has been reported worldwide as a causal agent of anthracnose disease in avocado and other crops. In Mexico, this species affects fruits from an early stage of development in the orchard until the post-harvest stage. Although fungicides are continuously applied to control Colletotrichum species, pericarp cankers and soft rot mesocarp in fruits are still frequently observed. Considering the lack of a precise description of the causative agent, the aim of the current study was to determine the pathogens involved in this symptomatology. Twenty-four isolates were consistently obtained from the pericarp of avocado fruits cv. "Hass" collected in the central avocado-producing area of Mexico. Morphological features such as colony growth, conidia size, and mycelial appressorium were assessed. Bayesian multilocus phylogenetic analyses were performed using amplified sequences of the internal transcribed spacer region of the nuclear ribosomal DNA; actin, chitin synthase, glyceraldehyde-3-phosphate dehydrogenase partial genes; and APn2-Mat1-2 intergenic spacer and mating type Mat1-2 partial gene from the nine selected isolates. In addition, fruits were inoculated with a conidial suspension and reproducible symptoms confirmed the presence of Colletotrichum fructicola in this area. This pathogenic species can now be added to those previously reported in the country, such as C. acutatum, C. boninense, C. godetiae, C. gloeosporioides, and C. karstii. Disease management programs to reduce the incidence of anthracnose should include C. fructicola to determine its response to fungicides that are routinely applied, considering that the appearance of new species is affecting the commercial quality of the fruits and shifting the original population structure.

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