Encyclopedia of Entomology

2008 Edition
| Editors: John L. Capinera

Metarhizium

  • Michael Bidochka
Reference work entry
DOI: https://doi.org/10.1007/978-1-4020-6359-6_4577

Metarhizium is a haploid, deuteromycetous, insect-pathogenic fungus and a common inhabitant of soil worldwide. At least two species are formally recognized, Metarhizium anisopliae and Metarhizium flavoviride. Of the two, M. anisopliae is by far more common and occurs over a wide range of insect species. However, based on ITS (internally transcribed spacer region of DNA encodings ribosomal RNA) sequence analysis, vegetative compatibility groups, and population genetics analysis, Metarhizium may be represented by a large number of species found worldwide. Thus, the taxonomy and systematics of this genus are not fully resolved. Population genetics analysis showed that in nature Metarhiziumreproduces clonally but also has the potential for recombination. Recombination may occur through a process called parasexuality, a form of mitotic recombination, where vegetatively compatible hyphae fuse and exchange nuclei to form a heterokaryon. The nuclei fuse to produce a diploid homokaryon, the...

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References

  1. Bidochka MJ, Kamp AM, Lavender TM, DeKoning J, De Croos JNA, (2001) Habitat association in two genetic groups of the insect-pathogenic fungus Metarhizium anisopliae: uncovering cryptic species? Appl Environ Microbiol 67:1335–1342PubMedCrossRefGoogle Scholar
  2. Bidochka MJ, Kasperski JE, Wild GAM (1998) Distribution and occurrence of deuteromycetous entomopathogenic fungi in temperate and near northern habitats. Can J Bot 76:1198–1204CrossRefGoogle Scholar
  3. Driver F, Milner RJ, Trueman JWH (2000) A taxonomic revision of Metarhizium based on a phylogenetic analysis of rDNA sequence data. Mycol Res 104:134–150CrossRefGoogle Scholar
  4. St Leger RJ, Frank DC, Roberts DW, Staples RC (1992) Molecular cloning and regulatory analysis of the cuticle-degrading protease structural gene from the entomopathogenic fungus Metarhizium anisopliae. Eur J Biochem 204:991–1001CrossRefGoogle Scholar
  5. Samuels RI, Charnley AK, Reynolds SE (1988) The role of destruxins in the pathogenicity of 3 strains of Metarhizium anisopliae for the tobacco hornworm Manduca sexta. Mycopathologia 104:51–58CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Michael Bidochka
    • 1
  1. 1.Trent UniversityPeterboroughCanada