Maize Tumors Caused by Ustilago maydis Require Organ-Specific Genes in Host and Pathogen

Author:

Skibbe David S.1,Doehlemann Gunther2,Fernandes John1,Walbot Virginia1

Affiliation:

1. Department of Biology, Stanford University, Stanford, CA 94305–5020, USA.

2. Max Planck Institute for Terrestrial Microbiology, D-35043 Marburg, Germany.

Abstract

Tailor-Made Tumor The biotrophic smut pathogen Ustilago maydis specifically infects the important crop plant, maize. The pathogen elicits large tumors on all aerial maize organs by redirecting primordia into a tumor pathway, and maize developmental mutants can disrupt tumor progression. Skibbe et al. (p. 89 ) examined gene expression in parallel in both the host plant and the smut pathogen and found that organ-specific gene expression patterns were required in both for tumor formation. Thus, fungal pathogens may exert distinct effects on different organs and tissues in plants, perhaps explaining the diverse pathologies that can be produced in diseased plants.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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