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a hard blackish mass formed by certain fungi, as ergot.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


, pl.


(sklē-rō'shē-ŭm, -shē-ă),
1. In fungi, a variably sized resting body composed of a hardened mass of hyphae with or without host tissue, usually with a darkened rind, from which fruit bodies, stromata, conidiophores, or mycelia may develop.
2. The hardened resting condition of the plasmodium of Myxomycetes.
Farlex Partner Medical Dictionary © Farlex 2012


  1. a resting stage in many fungi. It takes the form of a ball of HYPHAE varying in size from a pinhead to a football, and usually has a hard, dark-coloured exterior coating. Fruiting bodies may be formed eventually from the sclerotium (either sexual or asexual) or a MYCELIUM may form. Normally the sclerotium does not contain spores.
  2. the firm resting condition of a myxomycete. see MYXOMYCOTA.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Coley-Smith JR, Mitchell CM, Sansford CE (1990) Long-term survival of sclerotia of Sclerotium cepivorum and Stromatinia gladioli.
sclerotiorum produces structures known as sclerotia which permit it to overwinter or over summer in the absence of a host (Abawi and Grogan, 1979).
Fifteen days-old cultures were evaluated for sclerotia formation, however sclerotia were not observed to any isolate used for all media tested.
The mycelium will burrow its way down into the mineral soil and form sclerotia.
A survey on distribution of Aspergillus section Flavi in corn field soils in Iran: Population patterns based on aflatoxins, cyclopiazonic acid and sclerotia production.
Moreover, the fungi Aspergillus flavus has this morphological structure known as sclerotium (plural sclerotia).
Effect of fungicide on the survival of sclerotia of Macrophomina phaseolina at different soil manure levels and its infection on guar (Cyamopsis tetragonoloba).
The anti-insectan metabolite 10-oxo-ll,33-dihydropenitrem B (26) was isolated from the sclerotia of Aspergillus sulphureus and is related to the penitrems, a known group of tremorgenic fungal metabolites.
Generally, control of soilborne pathogens with chemicals is difficult because of their ecological behavior, extremely broad host range and the high survival rate of resistant forms such as chlamydospores and sclerotia under different environmental conditions [37].
Aspergillus flavus is a soilborne haploid fungus, known to asexually produce conidia and sclerotia and recently reported to have a sexual stage [3, 4].