Vol. 56 No. 3 (2017)
New or Unusual Disease Reports

First report of leaf spot caused by Alternaria argyroxiphii on African mahogany trees (Khaya senegalensis)

PDF
  • Lívia PIMENTA TEIXEIRA,
  • Thaissa DE PAULA FARIAS SOARES,
  • Leonardo SARNO SOARES OLIVEIRA,
  • Sandra MATHIONI,
  • Maria ALVES FERREIRA
Lívia PIMENTA TEIXEIRA
Departamento de Fitopatologia, Universidade Federal de Lavras, Lavras, MG, Brazil, 37200-000
Thaissa DE PAULA FARIAS SOARES
Departamento de Fitopatologia, Universidade Federal de Lavras, Lavras, MG, Brazil, 37200-000
Leonardo SARNO SOARES OLIVEIRA
Plant Protection, Research and Development, Sinarmas Forestry, Perawang, Riau, Indonesia, 28772
Sandra MATHIONI
Donald Danforth Plant Science Center, Saint Louis, Missouri, USA, 63132
Maria ALVES FERREIRA
Departamento de Fitopatologia, Universidade Federal de Lavras, Lavras, MG, Brazil, 37200-000
DOI: https://doi.org/10.14601/Phytopathol_Mediterr-20298

Published 2017-12-07

Keywords

  • leaf disease,
  • phylogenetics

How to Cite

[1]
L. PIMENTA TEIXEIRA, T. DE PAULA FARIAS SOARES, L. SARNO SOARES OLIVEIRA, S. MATHIONI, and M. ALVES FERREIRA, “First report of leaf spot caused by Alternaria argyroxiphii on African mahogany trees (Khaya senegalensis)”, Phytopathol. Mediterr., vol. 56, no. 3, pp. 502–510, Dec. 2017.

Copyright (c) 2017 Lívia PIMENTA TEIXEIRA, Thaissa DE PAULA FARIAS SOARES, Leonardo SARNO SOARES OLIVEIRA, Sandra MATHIONI, Maria ALVES FERREIRA

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Crossref
Scopus
Google Scholar
Europe PMC

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.

PDF

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...