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Double-Staining Method to Detect Pectin in Plant-Fungus Interaction
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Wheat leaf rust caused by Puccinia triticina.

Melvin D Bolton1, James A Kolmer, David F Garvin

  • 1USDA-ARS, Plant Science Research Unit, 411 Borlaug Hall, University of Minnesota, St. Paul, MN 55108, USA.

Molecular Plant Pathology
|November 21, 2008
PubMed
Summary

Leaf rust, caused by Puccinia triticina, is a widespread wheat disease. This review covers its infection process, pathogenicity, and host-parasite genetics for better disease management.

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Area of Science:

  • Plant Pathology
  • Mycology
  • Genetics

Background:

  • Leaf rust, caused by Puccinia triticina, is the most prevalent rust disease affecting wheat globally.
  • The fungus is an obligate parasite, producing wind-disseminated urediniospores that can cause continental-scale epidemics.

Purpose of the Study:

  • To review current knowledge on the Puccinia triticina/wheat interaction.
  • To emphasize the infection process, molecular pathogenicity, and host-parasite genetics.
  • To discuss population biology of P. triticina and rust resistance in wheat.

Main Methods:

  • Review of existing literature on Puccinia triticina and wheat interactions.
  • Analysis of molecular aspects of pathogenicity and host-parasite genetics.
  • Examination of population biology and rust resistance genes in wheat.

Main Results:

  • Puccinia triticina infects various wheat species and some wild grasses.
  • Disease symptoms range from hypersensitive flecks to large uredinia, depending on wheat resistance.
  • Urediniospores are sub-globoid, averaging 20 micrometers, with thick, echinulate walls.

Conclusions:

  • Understanding the P. triticina/wheat interaction is crucial for managing leaf rust epidemics.
  • Knowledge of pathogenicity, genetics, and population biology aids in developing resistant wheat varieties.
  • This review provides a comprehensive overview for researchers and breeders.