Dale Bumpers National Rice Research Center Site Logo
ARS Home About Us Helptop nav spacerContact Us En Espanoltop nav spacer
Printable VersionPrintable Version     E-mail this pageE-mail this page
Agricultural Research Service United States Department of Agriculture
Search
  Advanced Search
 
Programs and Projects
Subjects of Investigation
Germplasm Evaluation and Enhancement
Genomics Core Facility
Molecular Genetics
Molecular Plant Pathology
Molecular Biology
Cytogenetics
Weed Physiology
Cereal Chemistry
Rice Genetics and Breeding
 

Research Project: RESPONSE OF DIVERSE RICE GERMPLASM TO BIOTIC AND ABIOTIC STRESSES

Location: Dale Bumpers National Rice Research Center

Title: A user friendly method to isolate and single spore the fungi Magnaporthe oryzae and Magnaporthe grisea obtained from diseased field samples

Author

Submitted to: Plant Health Progress
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: September 30, 2009
Publication Date: December 15, 2009
Citation: Jia, Y. 2009. A user friendly method to isolate and single spore the fungi Magnaporthe oryzae and Magnaporthe grisea obtained from diseased field samples. Plant Health Progress. Available: doi:10.1094/PHP-2009-1215-01-BR.

Interpretive Summary: The fungus Magnaporthe oryzae is the causal agent for a wide range of plant diseases found on rice, wheat, rye grass, turfgrass and pearl millet. A simplified method to systematically isolate spores of the pathogen for use in research was developed. This method does not require elaborate equipment and can successfully generate purified cultures of the pathogen within a few days. Use of this method will help researchers interested in studying plant-pathogen interactions with the goal of improving disease resistance in many of our most important crops.

Technical Abstract: The fungus Magnaporthe oryzae is the causal agent for a wide range of plant diseases including diseases of rice, wheat, rye grass, turfgrass and pearl millet. A simple robust procedure for fungal isolation is not publicly available. In the present study, a user friendly method was developed to isolate the fungus Magnaporthe oryzae from field samples. Leaves with disease symptoms were collected from fields and were incubated in a container with a moistened filter paper under continuous laboratory white fluorescence light using a flow hood. After incubation for 24h, diseased tissues were examined under a light microscope. Fungal spores were identified and transferred into a fresh water agar plate using a loop with small amount of agar on the tip. After 2 days of culturing in water agar plate, mycelia of the fungus were transferred to fresh water agar for mycelia purification, amplification and were then transferred to filter paper on an oatmeal plate to produce mycelia and spores for long term storage at – 20°C. The fungal spores were produced on the filter paper and used to inoculate susceptible rice plants. Typical blast disease symptoms were observed 7 days after inoculation. This method can aid efforts to study M. oryzae for biological education and for the development of methods to control disease in numerous agronomically important crops.

   

 
Project Team
Gealy, David
Jia, Yulin
Pinson, Shannon
McClung, Anna
McClung, Anna
Eizenga, Georgia
 
Publications
   Publications
 
Related National Programs
  Plant Genetic Resources, Genomics and Genetic Improvement (301)
  Crop Protection & Quarantine (304)
 
 
Last Modified: 05/19/2013
ARS Home | USDA.gov | Site Map | Policies and Links 
FOIA | Accessibility Statement | Privacy Policy | Nondiscrimination Statement | Information Quality | USA.gov | White House