Assembling the Fungal Tree of Life

View changelog

Phylum Subphylum Class Subclass Order Family Genus Species Anamorph
Ascomycota Saccharomycotina Saccharomycetes Saccharomycetales Saccharomycodaceae Saccharomyces cerevisiae



Nuclear Division

Cell type: (ME) meiosis

Component: Nuc Div / SPB

CharacteristicStateCodeImages
Centriole absent 0  
Basic organization of the spindle pole spindle pole body a plaque or disc 3 Images
Spindle pole body form, interphase-prophase a 7- to 9-layered disc 4 Images
Spindle pole body form, metaphase-anaphase a 7-9-layered disc directly connected to spindle 5 Images
Spindle development site gap in nuclear envelope 0 Images
Spindle pole body migration (per Heath, 1980, Int. Rev. Cytol. 64:1) formation of adjacent fan-shaped arrays of microtubules that reorient during spindle formation 2 Images
Metaphase nuclear envelope intact with small polar fenestrae plugged by the spindle pole bodies 1 Images
Perinuclear endoplasmic reticulum absent 0  
Spindle vesicles absent 0  
Central spindle present 1 Images
Metaphase plate absent 0 Images
Spindle pole body cap absent 0 Images
Transient intranuclear element at late interphase-prophase absent 0 Images
Sources
Notes Spindle pole bodies composed of 3-layered inner plaque, an intermediate space divided by an electron-dense intermediate line, and a layered outer plaque; Peterson et al. shows spindle pole body in nuclear membrane gap.
Character Quality good
Fixation gluteraldehyde with osmium postfix
Study Complete no
Author Moens, P.B. and Rapport, E.
Date 1971
Source J. Cell Biol. 50: 344-361
Other Sources Peterson, J.B., Gray, R.H., and Ris, H. 1972. J. Cell Biol. 53:837-841

Cell type: (MI) mitosis

Component: Nuc Div / SPB

CharacteristicStateCodeImages
Centriole absent 0  
Basic organization of the spindle pole spindle pole body a plaque or disc 3 Images
Spindle pole body form, interphase-prophase a 7- to 9-layered disc 4 Images
Spindle pole body form, metaphase-anaphase a 5-layered disc directly connected to spindle 4 Images
Metaphase nuclear envelope intact with small polar fenestrae plugged by the spindle pole bodies 1 Images
Telophase nuclear envelope retention of complete nuclear envelope around the chromatin with median constriction/fragmentation 0 Images
Spindle pole body cap absent 0 Images
Transient intranuclear element at late interphase-prophase absent 0 Images
Sources
Notes Spindle pole bodies composed of 3-layered inner plaque, an intermediate space divided by an electron-dense intermediate line, and a layered outer plaque.
Character Quality good
Fixation gluteraldehyde with osmium postfix
Study Complete no
Author Moens, P.B. and Rapport, E.
Date 1971
Source J. Cell Biol. 50: 344-361

Text and images © 2006–2019 Regents of the University of Minnesota and David McLaughlin. All rights reserved.

Text and images made available under the terms of the Creative Commons BY-NC-SA 3.0 except those images whose copyright is held by others.  
hosted by MSI