粘菌アメーバの核分裂,および接合にともなう形態変化
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概要
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The life cycle of a myxomycete, Physarum polycephalum, is composed of two distinct vegetative phases, haploid myxamoeba and diploid plasmodium. It has been reported that diploid nuclei of plasmodia undergo endomitosis, in which nuclear membrane remains intact throughout mitosis and no centriole is observed. Because no report has been presented on the mitosis of myxamoebae, the author observed the mitosis by light and electron microscope. From these observations, it was found that haploid nuclei of myxamoebae showed astral type of mitosis with centrioles at the poles and nuclear membrane broke down during prophase.
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