@ARTICLE{TreeBASE2Ref30997, author = {Gilmara G. O. Soares and Eduardo Alves and Amanda L. Silveira and Fernanda D. Pereira and Sarah S. C. Guimar?es}, title = {Colletotrichum siamense is the main etiological agent of anthracnose of avocado in southeastern Brazil }, year = {2020}, keywords = {Infectious process, Post-harvest disease, Multilocus phylogeny, Pathogenicity, Persea americana}, doi = {}, url = {http://}, pmid = {}, journal = {Plant Pathology}, volume = {}, number = {}, pages = {}, abstract = {The anthracnose caused by species of Colletotrichum is considered one of the main post-harvest diseases for avocado. In this study, Colletotrichum strains associated with avocado anthracnose collected in different states from Brazil were evaluated through phylogenetic analysis, morphological characterization and pathogenicity assays. Moreover, the events during pathogen infection of avocados were examined by scanning electron microscope. To access genetic diversity of 54 Colletotrichum strains was performed partial sequence analysis of the gene gapdh. A subset of 14 strains was selected based on the generated groupings and the geographical origin for performing multilocus phylogeny analysis (gapdh, act, tub2 and ApMat). Two species previously described were identified: C. siamense belonging to the C. gloeosporioides species complex and Colletotrichum karstii belonging to the C. boninensespecies complex. All Colletotrichum strains evaluated caused typical symptoms of anthracnose in avocado fruits. The most virulent strain showed germination of the its conidia occurred between 6 and 12 hai. Penetration through wounds occurred 48 hai, tissue colonization occurred between 144 and 240 hai, and sporulation at 240 hai via the production of acervulus, conidiophores and conidia. The findings shed light on the aetiology of avocado anthracnose in Brazil and provide a better understanding of infection process of this pathogen, which may assist in the development of disease management strategies.} }

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