Ultrastructure of Mitosis in the Aquatic Fungus Catenaria anguillulae

Ichida, Allan A.; Fuller, Melvin S.

doi:10.2307/3757320

Cited by 55 publications

(25 citation statements)

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“…It would certainly seem to be a possibility for the numerous other situations where both astral microtubules and a distinct anaphase-telophase elongation of the central spindle occur . Included in this group are numerous fungi (10,16,17,(48)(49)(50)(51)(52)(53)(54)(55)(56)(57), several slime molds (58)(59)(60), some algae (61,62), certain protozoans (45,63), and higher animals (1, 2, 9, 11) . Girbardt's concept (10) of mitosis in the Basidiomycete, Trametes versicolor, is especially concordant .…”

Section: Discussionmentioning

confidence: 99%

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

Aist¹,

Berns²

1981

The Journal of Cell Biology

170

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The anaphase-telophase spindle usually elongates, and it has been assumed that the spindle pushes the incipient daughter nuclei apart. To test this assumption, we used a laser microbeam to sever the central spindle of the fungus, Fusarium solani, and measured the rate of separation of incipient daughter nuclei . When the microbeam was aimed beside the spindle, separation occurred at a rate (8 .6 ,um/min) that did not differ significantly from the rate (7 .6 Am/min) in unirradiated cells. But when the spindle was irradiated, it broke, and the separation was much faster (22.4p,m/min) . Irradiation of cytoplasm lateral to one spindle pole resulted in a 1 .5 pin/min reduction in the rate (6 .1 ,um/min) of separation . From these and other data, we infer that extranuclear forces, presumably involving astral microtubules, pull on the incipient daughter nuclei and that the central spindle limits the separation rate . Astral microtubles are associated with the plasma membrane or, sometimes, with the rough endoplasmic reticulum . Most of the spindle microtubules that are present at metaphase are depolymerized during anaphase and early telophase.

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Section: Discussionmentioning

confidence: 99%

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

Aist¹,

Berns²

1981

The Journal of Cell Biology

170

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“…Also, this study indicated that the nuclear en velope was found in the nucleus of each mitotic stage, and hence the separation of spindle and chromosomes in B. cinerea appeared to be intranucleate. The intranucleate or closed type of nuclear division was known in many fungi1, 5,14,17,19,32,43,45) except for Basidiomycetes, in the protozoan Blepharisma20) and in some algae29). Also, a SPB in the nuclei was disc-like, and associated with a ribosome-free zone on its cytoplasmic side and amorphous granular region in the nucleoplasm beneath the SPB, which appeared similar to that in Ascomycetes15, 16,18,24,28,[35][36][37]42).…”

Section: Discussionmentioning

confidence: 99%

Ultrastructural changes of nuclear behavior in hyphal tip cells of Botrytis cinerea treated with inosine.

Akutsu

Komagata

Okuyama

1986

Jpn. J. Phytopathol.

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Number, size, shape and distribution of nuclei in hyphal tip cells of Botrytis cinerea treated with inosine were different from those in the untreated ones. In the presence of inosine, the nuclei increased remarkably, and nuclei which differed in size and shape were contiguous in the hyphal tip cells and in the nuclei with one or two budding-like projections were frequently observed in these cells. In the hyphal tip cells treated with inosine, the nuclei lined up in one parallel or diagonal row, although the nuclei distributed in a file more or less uniformly in the untreated ones. From electron microscopy of the hyphal tip cells treated or untreated with inosine, the nuclei of various stages in mitosis were observ ed in the untreated ones, while in the treated ones, deformation of the nuclei suggesting non-mitosis, such as budding was frequently observed: nuclei whose part of the nuclear en velope began to project out, formed developing projections or the projections appeared nearly detached from the parent nuclei. In these nuclei, the spindle pole bodies and microtubules, which took roles in mitotic division of nuclei, were not found.

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“…), Armillaria (Motta,196? ) and Polystictus (Burnett, 1968), the centrlolar plaques In yeast (Robinow and Marak;1966) and Pustularla (Schrantz, 1967), more or less conventional tubular centrioles In Albugo (Berlin and Bowen, 1964), Catenaria (Ichida and Fuller, 1968), and here in Basldiobolus all appear to have real differences. It is proposed here that the terms "centric" and "acentric" apply not just to mitoses in cells with or without conventional centrioles respectively but instead be modified to indicate the presence or absence of any organizing center for spindle microtubules.…”

Section: P Nuclear Divisionmentioning

confidence: 99%

“…Chromosomes were not observed in these species. Ichida and Fuller (1968) demonstrated chromosomes during the intranuclear division of the water mold Catenaria anguillulae.…”

Section: Electron Microscopymentioning

confidence: 99%

The ultrastructure of the nuclear division of Basidiobolus ranarum Eidam

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Ultrastructure of Mitosis in the Aquatic Fungus Catenaria anguillulae

Cited by 55 publications

References 0 publications

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

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

Ultrastructural changes of nuclear behavior in hyphal tip cells of Botrytis cinerea treated with inosine.

The ultrastructure of the nuclear division of Basidiobolus ranarum Eidam

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