Assembling the Fungal Tree of Life

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Nuclear Division


Location code / cell type
  • ME, meiosis
  • MI, mitosis
  • Nuc Div / SPB
    • 1. Centriole
      • 0, absent
      • 1, present
    • 2. Basic organization of the spindle pole
      • 0, centriolar-associated material
      • 1, spindle pole body consists of small amounts of extranuclear material
      • 2, ring-like spindle pole body
      • 3, spindle pole body a plaque or disc
      • 4, spindle pole body globular
      • 5, bar
    • 3. Microtubules in spindle pole body in circle perpendicular to nuclear envelope
      • 0, absent
      • 1, present
    • 4. Spindle pole body form, interphase-prophase
      • 0, quadrilaterial plaque
      • 1, unlayered disc
      • 2, a 2-layered disc
      • 3, a 3-layered disc
      • 4, a 7- to 9-layered disc
      • 5, a globoid
      • 6, a subgloboid with flat internalized layer
      • 7, a subgloboid with internalized layer convex with respect to the spindle
      • 8, notched ring with middle piece and intranuclear component
      • 9, ring(s) containing microtubules but lacking centriolar 9-fold symmetry
      • a, slight amount of extranuclear and intranuclear material on either side of nuclear envelope
      • b, centriolar-associated extranuclear and intranuclear components with intact nuclear envelope
      • c, centriole-associated material
      • d, ring containing microtubules with centriolar 9-fold symmetry
      • e, bar
    • 5. Spindle pole body form, metaphase-anaphase
      • 0, quadilateral plaque with intact nuclear envelope and internal microtubule organizing center
      • 1, unlayered disc with intact nuclear envelope and internal microtubule organizing center
      • 2, a 2-layered disc with intact nuclear envelope and internal microtubule organizing center
      • 3, a 4-layered disc directly connected to spindle
      • 4, a 5-layered disc directly connected to spindle
      • 5, a 7-9-layered disc directly connected to spindle
      • 6, an ellipsoid that expands by more than 100% of its interphase-prophase size directly connected to spindle (Auricularia)
      • 7, a globoid that expands by more than 100% of its interphase-prophase size directly connected to spindle
      • 8, a globoid with limited enlargement directly connected to spindle
      • 9, a subgloboid with flat internalized layer directly connected to spindle (Microbotryum)
      • a, a subgloboid with internalized layer convex with respect to the spindle and directly connected to spindle (Tilletia/Ustilago)
      • b, notched ring with persistent half middle piece and clear zone between intranuclear component and nuclear envelope
      • c, ring(s) containing microtubules but lacking centriolar 9-fold symmetry
      • d, slight amount of extranuclear and intranuclear material on either side of nuclear envelope
      • e, centriolar-associated extranuclear and intranuclear components with intact nuclear envelope
      • f, centriole associated material
      • g, ring containing microtubules with centriolar 9-fold symmetry
      • h, bar and spindle microtubules often terminating within nucleus some distance from nuclear envelope
    • 6. Spindle development site
      • 0, gap in nuclear envelope
      • 1, cytoplasm
      • 2, intranuclear (nuclear envelope intact)
    • 7. Spindle pole body migration (per Heath, 1980, Int. Rev. Cytol. 64:1)
      • 0, migration before spindle formation
      • 1, migration during spindle formation
      • 2, formation of adjacent fan-shaped arrays of microtubules that reorient during spindle formation
      • 3, integration of spindle pole body into invaginated nuclear envelope before spindle formation
    • 8. Metaphase nuclear envelope
      • 0, intact
      • 1, intact with small polar fenestrae plugged by the spindle pole bodies
      • 2, loose polar fenestrae, including extensions of nuclear envelope into the cytoplasm at the spindle pole, but mainly intact
      • 3, partially dispersed
      • 4, nearly or entirely dispersed
    • 9. Telophase nuclear envelope
      • 0, retention of complete nuclear envelope around the chromatin with median constriction/fragmentation
      • 1, retention of parts of a disrupted nuclear envelope around the chromatin
      • 2, new envelope forms within old envelope
      • 3, dispersed in interzone (Basidiobolus)
      • 4, reappearance of nuclear envelope after metaphase
      • 5, retention of the nuclear envelope around the chromatin with constriction/fragmentation near the poles, and interzone is cut off from the daughter nuclei
    • 10. Perinuclear endoplasmic reticulum
      • 0, absent
      • 1, present
    • 11. Spindle vesicles
      • 0, absent
      • 1, present
    • 12. Central spindle
      • 0, absent
      • 1, present
    • 13. Metaphase plate
      • 0, absent
      • 1, present
    • 14. Spindle pole body cap
      • 0, absent
      • 1, continuous with the nuclear envelope
      • 2, distinct from nuclear envelope
      • 3, fragments of a discontinuous membrane that do not form a true cap
    • 15. Interphase chromatin condensation
      • 0, absent
      • 1, present
    • 16. Nucleolus behavior
      • 0, nucleolus is dispersed and no longer recognizable during prophase
      • 1, nucleolus discarded between prophase and metaphase
      • 2, nucleolus or part of it is more persistent and is discarded after metaphase
      • 3, nucleolus is persistent throughout division
    • 17. Transient intranuclear element at late interphase-prophase
      • 0, absent
      • 1, present within nucleus opposite the extranuclear spindle pole body




References associated with character state illustrations








PDF documents

Character list


Glossary


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