Distribution, phylogeny, and pathogenicity of Xanthomonas albilineans causing sugarcane leaf scald in Mexico

Cervantes-Romero Benjamín, Pérez-Rodríguez Paulino, Rott Philippe, Valdez-Balero Apolonio, Osnaya-González Mónica, Robledo-Paz Alejandrina, Hernández-Juárez Camilo, Crossa José, Rosas-Saito Greta H., Silva-Rojas Hilda V.. 2021. Distribution, phylogeny, and pathogenicity of Xanthomonas albilineans causing sugarcane leaf scald in Mexico. Crop Protection, 150:105799, 9 p.

https://doi.org/10.1016/j.cropro.2021.105799

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Quartile : Q1, Sujet : AGRONOMY

Résumé : Disease outbreaks attributed to leaf scald of sugarcane caused by Xanthomonas albilineans were recently reported in southern Mexico. In this study, the distribution of leaf scald was investigated in the main sugarcane producing-states in Mexico. The disease was found in eight of 14 sugarcane-growing states and in 12 of 31 fields. In contaminated fields, incidence of leaf scald based on symptomatic plants ranged from 3 to 15%. The causal agent was identified by phylogenetic reconstruction using a single concatenated sequence of four genes (16S rRNA, fusA, leuS, and rpiA). Twelve X. albilineans isolates from different locations in Mexico produced disease symptoms after inoculation into stalks of susceptible variety Mex 69–290. Microscopic examination of infected stalks revealed structural changes within vascular and non-vascular tissues. These alterations reflected acute disease development and highlighted the importance of selecting varieties resistant to X. albilineans in breeding programs in Mexico.

Mots-clés Agrovoc : maladie des plantes, pouvoir pathogène, phylogénie, distribution géographique, histopathologie, Xanthomonas albilineans, Saccharum

Mots-clés géographiques Agrovoc : Mexique

Mots-clés complémentaires : Échaudure des feuilles

Mots-clés libres : Histopathology, Pencil line, Red spots, Scanning electron microscopy, Side shoot proliferation, Vascular bundle occlusion

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

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