Nuclei in the somatic hyphae of Trichophyton mentagrophytes

Abstract

BAKERSPIGEL, A. 1973. Nuclei in the somatic hyphae of Triclrophytorz mentagroplzytes. Can. J. Microbiol.19: 223-229. There are four chronlosonles present in the somatic nuclei of Triclzophyton mer~tagroplzytes. Initially, these chromosomes are ring-shaped but as division proceeds they unfurl becoming rod-like. The spindle apparatus appears to be strand-like and beaded. At mid-division the chromosomes lie in two rows parallel to each other and on either side of the spindle. Each row contains four chromosomes which appear to be attached to the spindle at regions along its length. At the end of division each sister nucleus contains a complen~ent of four chromosomes. Movement of sister nuclei at the end of division appears to be unipolar. The single nucleolus in T. mentagropl~ytes does not disappear from view during division or immediately after separation of sister nuclei. As a result this nucleolus has been designated as an "undivided persistent nucleolus." BAKERSPIGEL, A. 1973. Nuclei in the somatic hyphae of Triclropl~ytorl mentagroplrytes. Can. J. Microbiol.19: 223-229. Dans le noyau somatique de Tricl~oplrytorr mentagroplrytes, quatre chromoson~es sont presents. Initialement, ces chromosomes sont en forme d'anneau mais d8s le processus de division ils se dtploient en forme de bbtonnets. L'appareil mitotique parait en plage et en chapelet. A mi-division, les chromosomes se trouvent en deux rangees paralleles d'un c6tt ou de I'autre du fuseau. Chaque rang contient quatre chromosomes qui apparaissent attachts au fuseau dans les regions de sa longueur. A la fin de la division, chaque noyau fille contient un complement de quatre chromosonles. Le mouvement de chaque noyau fille a la fin de la division parait Etre unipolaire. Le nucltole simple dans T. nlentagrophytes ne disparait pas durant la division ou immediatement apr8s la separation du noyau fille. A la suite de ces rtsultats, ce nucleole a t t t designt comme un "nucleole persistant et non divist."[Traduit par le journal]

Mechanics of chromosome separation during mitosis in Fusarium (Fungi imperfecti): new evidence from ultrastructural and laser microbeam experiments.

“…supported by our results. Our interpretation would explain why the entire mitotic apparatus, at least in several fungi, can migrate or oscillate in the cell (10,17,18,27) . It also would suggest why, during normal mitosis, the elongated, telophase spindle sometimes snaps in the middle with a recoil of the free ends toward the respective spindle poles (17,25) : the spindle is apparently under tension from polar forces pulling in opposite directions.…”

Karyology During Conidiogenesis in Gliomastix Murorum: Light Microscopy

“…These data also indicate no significant difference between mitotic events during conidiogenesis in G. murorum and in somatic mitoses of other fungi shown by the microscopy of Aist (1969), Bakerspigel ( 1973 ) , Crackower ( 1972) , Day ( 1972), and Robinow and Caten (1969). It appears that, in G. murorum at least, characteristically somatic nuclear events are correlated with the packaging of one of the divisional products into a reproductive propagule.…”