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Chlamydospore

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Gram stain of Candida albicans from a vaginal swab, showing hyphae, and chlamydospores, which are 2–4 µm in diameter.

A chlamydospore is the thick-walled large resting spore of several kinds of fungi, including Ascomycota such as Candida,[1] Basidiomycota such as Panus,[2] and various Mortierellales species.[3] It is the life-stage which survives in unfavourable conditions, such as dry or hot seasons. Fusarium oxysporum which causes the plant disease Fusarium wilt is one which forms chlamydospores in response to stresses like nutrient depletion. Mycelia of the pathogen can survive in this manner and germinate in favorable conditions.

Chlamydospores are usually dark-coloured, spherical, and have a smooth (non-ornamented) surface. They are multicellular, with cells connected by pores in the septae between cells.

Chlamydospores are a result of asexual reproduction (in which case they are conidia called chlamydoconidia) or sexual reproduction (rare). Teliospores are special kind of chlamydospores formed by rusts and smuts.

  • Pseudohyphae, chlamydospores and blastospores of Candida yeast.
    Pseudohyphae, chlamydospores and blastospores of Candida yeast.
  • Chlamydospores of the yeast Candida albicans
    Chlamydospores of the yeast Candida albicans

See also

References

  1. ^ Staib, P; Morschhäuser, J (2007). "Chlamydospore formation in Candida albicans and Candida dubliniensis--an enigmatic developmental programme". Mycoses. 50 (1): 1–12. doi:10.1111/j.1439-0507.2006.01308.x. PMID 17302741. S2CID 7387908.
  2. ^ Dennis, R. L. (1969). "Fossil mycelium with clamp connections from the middle pennsylvanian". Science. 163 (3868): 670–1. Bibcode:1969Sci...163..670D. doi:10.1126/science.163.3868.670. JSTOR 1726335. PMID 17742734. S2CID 206566719.
  3. ^ Wagner, L.; Stielow, B.; Hoffmann, K.; Petkovits, T.; Papp, T.; V, C. (2013). "A comprehensive molecular phylogeny of the Mortierellales (Mortierellomycotina) based on nuclear ribosomal DNA". Persoonia. 30 (1): 77–93. doi:10.3767/003158513x666268. PMC 3734968. PMID 24027348.


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