1. K-State home
  2. »Plant Pathology
  3. »Research
  4. »Plant Pathology Research: Thematic Areas
  5. »Fungal genetics

Department of Plant Pathology

Department of Plant Pathology
Kansas State University
1712 Claflin Road
4024 Throckmorton PSC
Manhattan, KS 66506

Ph: +1-785-532-6176
Fx: +1-785-532-5692
4106 Throckmorton Plant Sciences Center
Department of Plant Pathology
Kansas State University

Home | Research | About Us

Publications | Methods | Photo Gallery | Links

Leaf and Neck Blast (photo by Barbara Valent)

The rice blast fungus Magnaporthe oryzae, (formerly Magnaporthe grisea), causes a serious disease of rice worldwide. The blast fungus leads a hemi-biotrophic lifestyle, which means that it initially invades living plant cells. However, cellular and molecular details of its biotrophic invasion strategy were not known. We are applying fungal molecular genetics, gene expression profiling, live-cell fluorescence microscopy and transmission electron microscopy to understand the early cellular and molecular interactions. Our goals are to understand how the fungus manipulates and colonizes live plant cells to cause disease, and how the plant sometimes blocks disease through resistance ( R ) gene mediated resistance. We aim to understand the dual roles for fungal avirulence (AVR) genes in establishing biotrophic infection (A) , or, in the presence of a corresponding R gene, in triggering hypersensitive resistance (B).

(A) Successful infection occurs when the fungus invades living rice cells and forms extensive invasive hyphae within the cell. Around 36 hrs, invasive hyphae move synchronously into neighboring rice cells. (This image taken 36 hrs post inoculation) (B) Resistance occurs when rice containing R gene Pi-ta recognizes the fungal AVR-Pita gene, triggering hypersensitive cell death and blocking further growth of the fungus.

Light micrographs by Prasanna Kankanala

Check Out! The Magnaporthe grisea/Oryza sativa Interactions Database