Reyes: Polyuronides in the cell walls of Mucor rouxii. Reyes: Chemistry of spore wall differentiation in Mucor rouxii. : Nutrition, growth and morphogenesis of Mucor rouxii. : Induction of yeast-like development in Mucor by carbon dioxide. Nickerson: Isolation, composition, and structure of cell walls of filamentous and yeast-like forms of Mucor rouxii. Cota-Robles: A novel apical corpuscle in the hyphae of Mucor rouxii. Lippman: Autoradiographic study of patterns of cell wall construction during hyphal and yeastlike morphogenesis of Mucor rouxii. This continuity is correlated with a similarity in chemical composition of the cell wall reported earlier.īartnicki-Garcia, S.: Cell wall chemistry, morphogenesis and taxonomy of fungi. On the other hand, in the development of one vegetative cell from another, such as in the formation of hyphae from yeast cells, the cell wall is structurally continuous. A separate new wall is also formed under the spore wall during anaerobic germination leading to yeast cell formation. The lack of continuity between the spore and vegetative walls is correlated with marked differences in wall chemistry previously reported. The vegetative wall exhibits a nonlayered, uniformly microfibrillar appearance in marked distinction to the spore wall which is triple-layered, with two thin electron dense outer layers, and a thick transparent inner stratum. Associated with the apical wall of the germ tube is an apical corpuscle previously described. This new wall grows out, rupturing the spore wall, to become the germ tube wall. Instead, as in other Mucorales, a vegetative wall is formed de novo under the spore wall during germination stage I. rouxii does not germinate by converting the spore wall into a vegetative wall. Noticeable changes occurring during germination are the disappearance of electron-dense lipoid bodies, formation of a large central vacuole and, most strikingly, formation of a new cell wall. In both stages, germination is growth in its strictest sense with overall increases in cell organelles e.g., the increase in mitochondria is commensurate with the overall increase in protoplasmic mass. The germination process may be divided into two stages: I, spherical growth II, emergence of a germ tube. The fine structure of ungerminated and aerobically germinated sporangiospores of Mucor rouxii was compared.
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