Morphocultural and molecular characterization of Colletotrichum spp. isolates from of various tropical fruits

Author(s)

Fernanda Dias Pereira

• Document type: Doctoral Thesis
• Press: Jaboticabal. 2016-03-15.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal
• Defense date: 2016-02-11
• Advisor: Antonio de Goes

Abstract

The average production of fruit per year worldwide is about 800 million tons. The Brazil is third in ranking of the major producing nations. It is behind only to China and India, respectively. It acertain that Brazil has great potential to be explored in the context of exports. Among the post-harvest damage includes up the fungal nature, highlighting the complex anthracnose, caused by fungi of the genus Colletotrichum and present in all the producing countries of fruit. Among the postharvest damage includes up the fungal nature, highlighting the complex anthracnose, caused by fungi of the genus Colletotrichum and present in all the producing countries of fruit. This study aimed to identify the taxonomic species of Colletotrichum associated with avocado fruit, banana, guava and mango, as well as to establish phylogenetic relationships among the species identified. Two hundred isolates of Colletotrichum spp. fruit avocado, banana, guava and mango trees, underwent Morphocultural analysis, molecular and pathogenicity. According to the results, cultural and morphological characterization still enabling the detection of phenotypic diversity among isolates, do not provide reliable results for identification of species of Colletotrichum evaluated. The Colletotrichum spp. found in avocado fruit, banana, guava and mango showed no physiological specificity. C. musae and C. siamense are associated with anthracnose symptoms on avocado in Brazil. The causal agent of anthracnose in banana is not composed of a single monophyletic group of C. musae, suggesting the existence of more than one species as a pathogen of this crop. In addition to C. acutatum and C. gloeosporioides, C. siamanese and C. musae are also pathogen responsible for anthracnose symptoms in fruits of guava. The anthracnose in hose fruits in the state of São Paulo, is associated with the species C. asianum and C. dianesii. (AU)

• FAPESP's process: 12/16345-4 - MORFOCULTURAL AND MOLECULAR CHARACTERIZATION OF COLLETOTRICHUM SPP. ISOLATES FROM DIFFERENT TROPICAL FRUIT
• Grantee: Fernanda Dias Pereira
• Support Opportunities: Scholarships in Brazil - Doctorate