Assembling the Fungal Tree of Life

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Nuclear Division - Illustrated


Location code / cell type
  • ME, meiosis
  • MI, mitosis
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1. Centriole
0, absent

1, present

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2. Basic organization of the spindle pole
0, centriolar-associated material

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1, spindle pole body consists of small amounts of extranuclear material

Picture_5_3a73f2f8fc1fdc1f6ea8629777ede164714cb947
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2, ring-like spindle pole body

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3, spindle pole body a plaque or disc

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4, spindle pole body globular

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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

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1, unlayered disc

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2, a 2-layered disc

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3, a 3-layered disc

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4, a 7- to 9-layered disc

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5, a globoid

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6, a subgloboid with flat internalized layer

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7, a subgloboid with internalized layer convex with respect to the spindle

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8, notched ring with middle piece and intranuclear component

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9, ring(s) containing microtubules but lacking centriolar 9-fold symmetry

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a, slight amount of extranuclear and intranuclear material on either side of nuclear envelope

Picture_34_bcfb2750f003867f351a06a714a1e14591a5be51
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b, centriolar-associated extranuclear and intranuclear components with intact nuclear envelope

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c, centriole-associated material

Picture_38_b551bd52aea05e0545d065f7152b805b820b012a
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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

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1, unlayered disc with intact nuclear envelope and internal microtubule organizing center

Picture_7_92c51470a3a42c9d1cb19e7a175326d320ea7d30
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2, a 2-layered disc with intact nuclear envelope and internal microtubule organizing center

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3, a 4-layered disc directly connected to spindle

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4, a 5-layered disc directly connected to spindle

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5, a 7-9-layered disc directly connected to spindle

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6, an ellipsoid that expands by more than 100% of its interphase-prophase size directly connected to spindle (Auricularia)

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7, a globoid that expands by more than 100% of its interphase-prophase size directly connected to spindle

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8, a globoid with limited enlargement directly connected to spindle

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9, a subgloboid with flat internalized layer directly connected to spindle (Microbotryum)

Picture_24_8fd2d20ae7b2ef31f9914710743a4313ca9bf97f
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a, a subgloboid with internalized layer convex with respect to the spindle and directly connected to spindle (Tilletia/Ustilago)

Picture_26_40e3107790c5562a44ce33a584128530ab89e3d8
Picture_27_3db88a05b5ed7aaa2be497b5a219553bb966c823
b, notched ring with persistent half middle piece and clear zone between intranuclear component and nuclear envelope

Picture_28_b34262d7a9658ef1817525421fb662b770fb334d
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c, ring(s) containing microtubules but lacking centriolar 9-fold symmetry

Picture_30_454fc2142664765bcf7fa0927aec8c276d1a288d
Picture_31_26b9432b20154a7da921baa6d4bde8f0a6412078
d, slight amount of extranuclear and intranuclear material on either side of nuclear envelope

Picture_32_a23f110f7363885933156983138bbb21eb85f5ed
Picture_33_ff93493d9f3d17c56ead3e39ff902f3f4b1581a9
e, centriolar-associated extranuclear and intranuclear components with intact nuclear envelope

Picture_34_0ce32e280c1a5e7a1ec147acb86a9d7a02736371
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f, centriole associated material

Picture_36_df7e9f0882f1a41149ed5ea9f44f0b23577b1cfe
Picture_37_0f44f6bd7cab4edc5ccce304e7236484a6a63c1e
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

Picture_38_80ac96ed8d5a9df2c707f330ddd902c291f6e9a8
Picture_39_80669d944edacc8b7faf007b7710b52648794219
1, cytoplasm

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Picture_41_b9615d0fcf1c29b7a56147e5f9a9983b732ddb3a
2, intranuclear (nuclear envelope intact)

Picture_42_13ba92fafb661e82e95fa2815352c58ca42323fc
Picture_43_67c5be02bcd536d146a39ba858db47ff38397782
7. Spindle pole body migration (per Heath, 1980, Int. Rev. Cytol. 64:1)
0, migration before spindle formation

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1, migration during spindle formation

Picture_45_5041caf144728f61d2f6cd85bfe69432678c1e91
2, formation of adjacent fan-shaped arrays of microtubules that reorient during spindle formation

Picture_46_8732cba12fd372c3941af87d11f1d9da5ee78dac
3, integration of spindle pole body into invaginated nuclear envelope before spindle formation

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8. Metaphase nuclear envelope
0, intact

Picture_5_cae1ba95b9e1cf1482bdf07506441a4d4f0cabd6
Picture_6_598752ef0a70731094b4e72e3ca89f13960eb834
1, intact with small polar fenestrae plugged by the spindle pole bodies

Picture_7_d3f3c4ac34e10e0643b79374ffd097b7f13da12c
Picture_8_9acde9514cac7c5db1642c61a20abb045f3861a7
2, loose polar fenestrae, including extensions of nuclear envelope into the cytoplasm at the spindle pole, but mainly intact

Picture_10_bf415e91dbe6b08a163f339af3d333d862e563da
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3, partially dispersed

Picture_11_17cd45376ce75b968c723be526638f1e636c7da7
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4, nearly or entirely dispersed

Picture_13_813fb1f446b9ddbe2621463c1b91b82221849769
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9. Telophase nuclear envelope
0, retention of complete nuclear envelope around the chromatin with median constriction/fragmentation

Picture_15_c071d141d88003ca4d80fe60bc3d2e670185f66f
Picture_16_ac1297575a82abbba40bc635ed48bb3960accf64
1, retention of parts of a disrupted nuclear envelope around the chromatin

Picture_17_611a0735e8b04328944023ec820d2f41721315bf
Picture_18_a6dc51f2caae5c40e113897e6e90ab18be71f549
2, new envelope forms within old envelope

Picture_19_d8114fbfe85cd58413fc4ebd71fb477f5d85d8e9
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3, dispersed in interzone (Basidiobolus)

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4, reappearance of nuclear envelope after metaphase

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5, retention of the nuclear envelope around the chromatin with constriction/fragmentation near the poles, and interzone is cut off from the daughter nuclei

Picture_25_72b837bbecc60f923ee1fd784340cdf7d14e6cc7
Picture_26_5bb6cbcbf936335a97f56324b5c369ea608a6e98
10. Perinuclear endoplasmic reticulum
0, absent

1, present

Picture_28_a285eb6180250d76b9db850c6475e8a856b823f2
Picture_29_0a19c160ecefc56a2568f020efd4a169fa2fa3c0
11. Spindle vesicles
0, absent

1, present

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12. Central spindle
0, absent

Picture_32_8b4a900214436e0cb26a149c9dba8bfbded0cc6e
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1, present

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13. Metaphase plate
0, absent

Picture_34_bf43879412fc4aa5e66e6e456e5c902bf6aa5204
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1, present

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Picture_38_c90bf7401a1c019cc3793ba6df0775f3f925b234
14. Spindle pole body cap
0, absent

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Picture_48_554ccb2e381d15be404f26dcb9e6e320848f7bee
1, continuous with the nuclear envelope

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2, distinct from nuclear envelope

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3, fragments of a discontinuous membrane that do not form a true cap

Picture_45_8e700fc55950210e1f67b3f12a0ce4e332a37792
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15. Interphase chromatin condensation
0, absent

1, present

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Picture_49_30e3fe4865db7bfa0ded32bece959205ae693c1a
16. Nucleolus behavior
0, nucleolus is dispersed and no longer recognizable during prophase

Picture_50_67c3ce94b39037240c0543d13b69bb5555bd59bf
Picture_51_d61318f283090a6329135df577c73edf158ef0fa
1, nucleolus discarded between prophase and metaphase

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2, nucleolus or part of it is more persistent and is discarded after metaphase

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Picture_55_8318fa9a97562646433103450c0f8e30ebb78ff7
3, nucleolus is persistent throughout division

Picture_56_d3c602ec1455ef3a6646329ffe9324919dfd786a
Picture_57_06f667fa45e075d034e3f483828c6ffcf9b35e4a
17. Transient intranuclear element at late interphase-prophase
0, absent

Picture_58_84d0158fd8354c354776c526552431b3d206f2c5
Picture_59_411344c3eefa5a4dcc850a0993648d5be9b47e44
1, present within nucleus opposite the extranuclear spindle pole body

Picture_60_09ce36e8787f27d47dad64b4e66324ad57e61e64
Picture_61_ed9f27886fc773edfc6d9536ef276cfc61ccb723




References associated with character state illustrations








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Character list


Glossary


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