alexa Arabidopsis Infection by Haploid or Diploid Strains of Ustilago maydis Reveals its Capacity as A Necrotrophic or Biotrophic Phytopathogen
ISSN: 2165-8056

Fungal Genomics & Biology
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Research Article

Arabidopsis Infection by Haploid or Diploid Strains of Ustilago maydis Reveals its Capacity as A Necrotrophic or Biotrophic Phytopathogen

Domingo Martínez Soto, Fernando Emilio Pérez García and José Ruiz Herrera*
Department of Genetic Engineering, Unit Irapuato, CINVESTAV National Polytechnic Institute, Irapuato, Guanajuato, Mexico
*Corresponding Author : José Ruiz-Herrera
Department of Genetic Engineering, Unit Irapuato
CINVESTAV National Polytechnic Institute
Irapuato, Guanajuato, Mexico
Tel: +52 (462) 623 96 00
Fax: +52 (462) 624 58 46
E-mail: [email protected]
Received date: Feb 26, 2016; Accepted date: Mar 08, 2016; Published date: Mar 15, 2016
Citation: Martínez-Soto D, Pérez-García FE, Ruiz-Herrera J (2016) Arabidopsis Infection by Haploid or Diploid Strains of Ustilago maydis Reveals its Capacity as A Necrotrophic or Biotrophic Phytopathogen. Fungal Genom Biol 6:133. doi:10.4172/2165-8056.1000133
Copyright: © 2016 Martínez-Soto D, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

The use of experimental patho-systems is a widely used strategy for understanding the pathogenic processes developed by many infectious agents. Ustilago maydis is a Basidiomycota fungus that naturally infects only maize and teozintle. We have established that under axenic conditions, either haploid or diploid strains of U. maydis can infect Arabidopsis thaliana, and in this work we analyzed the different behaviour of U. maydis haploid, diploid, and merodiploid strains in the mating genes during Arabidopsis infection. We determined the severity of infection, cell death, and the production of phytohormones and reactive oxygen species (ROS), occurring in the invaded host. Our results indicate that whereas U. maydis diploid and merodiploid strains behave as biotrophic parasites, the behaviour of the haploid strain is necrotrophic. We suggest that this difference resides in the fact that only the former two strains, but not the haploid one, are able to synthesize the master regulator of the biotrophic pathogenic behaviour, the bE/bW heterodimer encoded by the b genes of the two mating partners.

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