Candida stellatoidea,Candida albicans厚膜胞子の発芽能とその微細構造 (真菌細胞の発育過程における微細構造の変化-1〜3-)

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Changes in ultrastructure during the germination of chlamydospores of Candida stellatoidea and C. albicans were studied by the electron microscope.The germination could be seen when relatively immature chlamydospores were transferred to nutrient medium from chlamydospore-formation medium. The cell wall of the chlamydospore was composed of four major layers. The present observation revealed that the three outer layers had ruptured to form the germ pore, and that the fourth, or the innermost, layer of electron transparent material was continuous to the whole cell wall of the germ bulb.This appearance was generally analogous to that of the blastospore of this fungus, that of the ascospore of Saccharomyces or Neurospora, and that of the aeciospore of Cronartium.In the germination of the chlamydospore, most of the intracytoplasmic organelles (nucleus, mitochondria, endoplasmic reticulm, and vacuoles) migrated into the germ bulb. The chlamydospore itself became empty or occupied entirely with a large spongioid vacuole. This type of chlamydospores could not germinate any more.On the other hand, the blastospore had an ability to perform germination a few successive times.A chlamydospore which had advanced in maturation failed to germinate. In the chlamydospore, the electron-dense third layer of the cell wall was extremely thick and the fourth layer little visible.
日本細菌学会の論文