Early down-regulation of chorismate mutase 2 gene expression in a sugarcane cultivar tolerant to Xanthomonas albilineans infection

• Autor(a) principal: Rosa-Santos, T. M. [UNESP]
• Data de Publicação: 2019
• Outros Autores: Nogueira, L. F., Paz, T. A. [UNESP], Silva, R. G. da [UNESP], Silva, J. O. L., Creste, S., Zingaretti, S. M. [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.4238/gmr183262; http://hdl.handle.net/11449/195431
• topic: Biotic stress; Chorismate mutase 2; Cytosolic; Sugarcane

Xanthomonas albilineans causes leaf scald disease, one of the most economically important diseases of sugarcane. Leaf scald is a systemic and vascular disease that can severely reduce productivity. The best and primary method of leaf scald control is the use of tolerant cultivars. Knowing that cell wall lignification is a plant defense mechanism and that chorismate mutase is relevant in this process, we analyzed the expression pattern of the chorismate mutase 2 (SoCM2) gene in two contrasting sugarcane cultivars by RT-qPCR. A similar pattern of downregulation for the SoCM2 gene was observed in both cultivars; however, after 72h, the tolerant cultivar (RB867515) showed repression of the SoCM2 gene, while for the susceptible cultivar (SP78-4467), SoCM2 gene downregulation occurred only after 144h. Here we propose that early repression of the SoCM2 gene is responsible for tolerance to X. albilineans infection in the sugarcane cultivar RB867515.