World Library  
Flag as Inappropriate
Email this Article

Cystidium

Article Id: WHEBN0004059645
Reproduction Date:

Title: Cystidium  
Author: World Heritage Encyclopedia
Language: English
Subject: Fungi/Did you know/5, Hydnellum, Russula brevipes, Armillaria gallica, Polyozellus
Collection: Fungal Morphology and Anatomy
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Cystidium

A cystidium (plural cystidia) is a relatively large cell found on the hymenium of a basidiomycete (for example, on the surface of a mushroom gill), often between clusters of basidia. Since cystidia have highly varied and distinct shapes that are often unique to a particular species or genus, they are a useful micromorphological characteristic in the identification of basidiomycetes. In general, the adaptive significance of cystidia is not well understood.

Contents

  • Classification of cystidia 1
    • By position 1.1
    • By morphology 1.2
  • External links 2
  • References 3

Classification of cystidia

Metuloid-type cystidium of Inocybe, stained with Congo red.

By position

Cystidia may occur on the edge of a lamella (or analogous hymenophoral structure) (cheilocystidia), on the face of a lamella (pleurocystidia), on the surface of the cap (dermatocystidia or pileocystidia), on the margin of the cap (circumcystidia) or on the stipe (caulocystidia). Especially the pleurocystidia and cheilocystidia are important for identification within many genera. Sometimes the cheilocystidia give the gill edge a distinct colour which is visible to the naked eye or with a hand lens.

By morphology

Chrysocystidia are cystidia whose contents contain a distinct refractive yellow body, that becomes more deeply yellow when exposed to ammonia or other alkaline compounds. Chrysocystidia are characteristic of many (though not all) members of the agaric family Strophariaceae.

Gloeocystidia have an oily or granular appearance under the microscope. Like gloeohyphae, they may be yellowish or clear (hyaline) and can sometimes selectively be coloured by sulphovanillin or other reagents.[1] Metuloids are thick-walled cystidia with an apex having any of several distinct shapes.[2]

External links

  • BCERN Glossary: Cystidia
  • MushroomExpert.com"Using a Microscope: Basidia and Cystidia" by Michael Kuo.
  • Wild Mushrooms from Tokyo: Inocybe nodulosospora Includes very good photograph of cystidia.

References

  1. ^ Moser M (translated by S Plant). 1983. Keys to Agarics and Boleti. Roger Phillips. ISBN 0-9508486-0-3.
  2. ^ Largent D, et al. 1977. How to Identify Mushrooms to Genus III: Microscopic Features. Arcata, CA: Mad River Press. ISBN 0-916422-09-7.
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.