Blastoconidium

Blastoconidium is a holoblastic conidium that is produced singly or in chains, and detached at maturity leaving a bud scar, as in the budding of a yeast cell.

Description

Yeasts such as Candida albicans and Cryptococcus neoformans produce budded cells known as blastoconidia.[1] The formation of blastoconidia involves three basic steps: bud emergence, bud growth, and conidium separation. During bud emergence, the outer cell wall of the parent cell thins. Concurrently, new inner cell wall material and plasma membrane are synthesized at the site where new growth is occurring. New cell wall material is formed locally by activation of the polysaccharide synthetase zymogen. The process of bud emergence is regulated by the synthesis of these cellular components as well as by the turgor pressure in the parent cell. Mitosis occurs, as the bud grows, and both the developing conidium and the parent cell will contain a single nucleus. A ring of chitin forms between the developing blastoconidium and its parent yeast cell. This ring grows in to form a septum. Separation of the two cells leaves a bud scar on the parent cell wall. The bud scar contains much more chitin than does the rest of the parent cell wall. When the production of blastoconidia continues without separation of the conidia from each other, a pseudohypha, consisting of a filament of attached blastoconidia, is formed. In addition to budding yeast cells and pseudohyphae, yeasts such as Candida albicans may form true hyphae.

gollark: I'm going to have to try and get that in 2 hours when I have *another* open slot.
gollark: The release is going to probably still be around in 2 hours, right? To get all six I need an extra eggslot, and I've got an egg hatching in, well, 2 hours.
gollark: ... wait, are there regular xenos in the biomes too?
gollark: I like xenowyrms. So obviously more xenowyrms is good.
gollark: MORE XENOWYRMS YAAAAAAAY

References
  1. Alburquenque, Claudio; Amaro, José; Fuentes, Marisol; Falconer, Mary A.; Moreno, Claudia; Covarrubias, Cristian; Pinto, Cristian; Rodas, Paula I.; Bucarey, Sergio A.; Hermosilla, Germán; Magne, Fabien (2019-06-01). "Protective effect of inactivated blastoconidia in keratinocytes and human reconstituted epithelium against C. albicans infection". Medical Mycology. 57 (4): 457–467. doi:10.1093/mmy/myy068. ISSN 1460-2709. PMID 30169683.
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