CYTOLOGIC STUDIES OF MEIOSIS IN <i>SCHIZOSACCHAROMYCES OCTOSPORUS</i>*

Widra, A.; Lamater, Edward D. De

doi:10.1111/j.2164-0947.1954.tb01179.x

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…Another plausible mechanism for the formation of extra spores is an extra round of postmeiotic (or MIII-like) nuclear division ( Molnar and Sipiczki, 1993 ; Tanaka and Hirata, 1982 ; Widra and De Lamater, 1954 ). In S. pombe and S. cerevisiae , mutants with perturbed meiosis exit undergo an MIII-like division leading to the formation of additional (more than four) daughter nuclei, such as mutants that are defective in anaphase-promoting complex/cyclosome activators ( Aoi et al, 2013 ; Wang et al, 2020 ).…”

Section: Resultsmentioning

confidence: 99%

Pcp1/pericentrin controls the SPB number in fission yeast meiosis and ploidy homeostasis

Zhu

Jiang

2021

Journal of Cell Biology

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During sexual reproduction, the zygote must inherit exactly one centrosome (spindle pole body [SPB] in yeasts) from the gametes, which then duplicates and assembles a bipolar spindle that supports the subsequent cell division. Here, we show that in the fission yeast Schizosaccharomyces pombe, the fusion of SPBs from the gametes is blocked in polyploid zygotes. As a result, the polyploid zygotes cannot proliferate mitotically and frequently form supernumerary SPBs during subsequent meiosis, which leads to multipolar nuclear divisions and the generation of extra spores. The blockage of SPB fusion is caused by persistent SPB localization of Pcp1, which, in normal diploid zygotic meiosis, exhibits a dynamic association with the SPB. Artificially induced constitutive localization of Pcp1 on the SPB is sufficient to cause blockage of SPB fusion and formation of extra spores in diploids. Thus, Pcp1-dependent SPB quantity control is crucial for sexual reproduction and ploidy homeostasis in fission yeast.

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Section: Resultsmentioning

confidence: 99%

Pcp1/pericentrin controls the SPB number in fission yeast meiosis and ploidy homeostasis

Zhu

Jiang

2021

Journal of Cell Biology

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Les progrès récents de la cytologie des Champignons en microscopie usuelle et en microscopie corpusculaire

Moreau¹

1958

Bulletin de la Société Botanique de France

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CYTOLOGIC STUDIES OF MEIOSIS IN *SCHIZOSACCHAROMYCES OCTOSPORUS**

Cited by 2 publications

References 3 publications

Pcp1/pericentrin controls the SPB number in fission yeast meiosis and ploidy homeostasis

Pcp1/pericentrin controls the SPB number in fission yeast meiosis and ploidy homeostasis

Les progrès récents de la cytologie des Champignons en microscopie usuelle et en microscopie corpusculaire

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CYTOLOGIC STUDIES OF MEIOSIS IN SCHIZOSACCHAROMYCES OCTOSPORUS*

Cited by 2 publications

References 3 publications

Pcp1/pericentrin controls the SPB number in fission yeast meiosis and ploidy homeostasis

Pcp1/pericentrin controls the SPB number in fission yeast meiosis and ploidy homeostasis

Les progrès récents de la cytologie des Champignons en microscopie usuelle et en microscopie corpusculaire

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CYTOLOGIC STUDIES OF MEIOSIS IN *SCHIZOSACCHAROMYCES OCTOSPORUS**