Cytology of Mycetozoa

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Abstract

IN her paper entitled “The Life-History and Cytology of Didymium nigripes Fr.”, 1 Dr. E. J. Cadman has made a valuable contribution to the literature on Mycetozoa. The principal points described by her are the following : the active swarm-cells possess what she terms a “centroblepharoplast” and cone apparatus connecting the nagellum with the nucleus ; the nucleus of the swarm-spores has four chromosomes ; a definite myxamœlig;boid stage occurs when all trace of cone-apparatus disappears ; the myxamœbæ unite in pairs as gametes to form a zygote or young plasmodium, and their nuclei also fuse ; the fusion nucleus contains eight chromosomes, a diploid number characteristic of all succeeding nuclei of the plasmodium ; meiosis occurs in the nuclei of the young sporangium before spore-formation, when a heterotypic division with four U-shaped chromosomes is swiftly followed by a homotypie division with four nearly spherical chromosomes.

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References

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    Trans. Roy. Soc. Ediuburgh, 56, 93–142 ; 1931.

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    "Observations on Mycetozoa in the Genus Didymium", Trans. birt. Myc. Soc., 14, 227–248 ; 1929.

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LISTER, G. Cytology of Mycetozoa. Nature 129, 131–132 (1932) doi:10.1038/129131c0

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