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Magnaporthe grisea

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Revision as of 23:50, 14 April 2009 by Shridevi singh (Talk | contribs) (Genome structure)

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Magnaporthe grisea

A conidium and conidiogenous cell of M. grisea

Magnaporthe grisea.jpg
Scientific classification
Kingdom: fungi
Phylum: Ascomycota
Class: Sordariomycetes
Order: Incertae sedis
Family: Magnaporthaceae
Genus: Magnaporthe
Species: M.grisea
Binomial name
Magnaporthe grisea

Description and significance

Magnaporthe grisea, a plant-pathogenic fungus, is the causal agent of rice blast disease which is one of the greatest pathological threats to rice crops. It was thought to be localized only in developing nations, however for the past decade it has emerged as a severe problem in the United States, more recently in California. Yearly, rice that can feed an estimated 60 million people is destroyed by this disease. M.grisea is a well adapted fungus that can attack and penetrate its host plant with ease. More importantly, this fungus can also infect other important agricultures such as cereals, wheat, rye, pearl millet, and barley. The disease that is cause is then referred as blight disease or blast disease. Furthermore, M.grisea is thought of as a model organism in studies of fungal phytopathogenicity and host-parasite interactions.

A typical eye-shaped lesion of rice blast disease on a U.S. rice cultivar that was inoculated with M.grisea.

Genome structure

Due to the destructive nature of this pathogen, sequencing the entire genome was necessary to understand the mechanisms of how the fungus causes disease. The complete genome of M.grisea was sequenced in 2005. M. grisea is a haploid and consists of ~40 Mb that are contained in 7 chromosomes (Talbot et al. 1993; Orbach 1996).

Cell structure and metabolism



Application to Biotechnology

Current Research