Please use this identifier to cite or link to this item:
Title: First report of leaf spot caused by Alternaria argyroxiphii on African mahogany trees (Khaya senegalensis)
Keywords: Leaf disease
Alternaria argyroxiphii
Doença foliar
Issue Date: 2017
Publisher: Mediterranean Phytopathological Union
Citation: TEIXEIRA, L. P. et al. First report of leaf spot caused by Alternaria argyroxiphii on African mahogany trees (Khaya senegalensis). Phytopathologia Mediterranea, Bologna, v. 56, n. 3, p. 502-510, 2017.
Abstract: Alternaria argyroxiphii is reported for the first time as the cause of leaf spot on African mahogany trees (Khaya senegalensis). The disease was first observed in African mahogany field plantations in Perdões, Minas Gerais, Brazil, in October, 2012. Morphological characteristics and phylogeny of the pathogen were determined, and pathogenicity assays assessed the species specificity. Leaf spot was the major symptom observed. Phylogenetic analyses of the combined dataset of the Alternaria major allergen gene (Alt a 1) and glyceraldehyde-3-phosphate dehydrogenase (gpd) showed that the recovered isolates clustered into Alternaria sect. Porri and much resembled A. argyroxiphii, with 99% booststrap support and Bayesian posterior probability of 1.0. This was largely concordant with morphological characteristics (on potato carrot agar) of A. argyroxiphii, including large conidia and long beaks. A pathogenicity test, carried out to fulfil Koch’s postulates, confirmed A. argyroxiphii as a causal agent of leaf spot of K. senegalensis.
Appears in Collections:DFP - Artigos publicados em periódicos

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Admin Tools