Distribution of nuclei in macroconidia ofMicrosporum gypseum

Abstract

The distribution of nuclei in macroconidia was investigated in 20 strains of the dermatophyte Microsporum gypseum by fluorescence microscopy. The macroconidia were characterized by the right-left and the central-marginal symmetry indices. In 18 strains the significant majority of the nuclei were situated in the basal part of the macroconidium, the remaining 2 strains showed a more or less uniform distribution of nuclei. All strains had higher numbers of nuclei in the central part of the macroconidium as compared with the periphery.

Visualizing Nuclear Migration during Conidiophore Development inAspergillus nidulansandAspergillus oryzae: Multinucleation of Conidia Occurs through Direct Migration of Plural Nuclei from Phialides and Confers Greater Viability and Early Germination inAspergillus oryzae

“…Tel: +81-3-5841-5161; Fax: +81-3-5841-8033; E-mail: akitamo@mail.ecc.u-tokyo.ac.jp spora crassa and Microsporum gypseum. 11,12) While these observations indicate that filamentous fungi maintain a multinucleate state throughout their life cycle, knowledge on the mechanism of multinucleation in conidia is limited. It is, therefore, envisaged that visualizing nuclear migration during the development of conidiophore would provide vital information on the onset of multinucleate conidia formation.…”