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AbstractIn this study, megasporogenesis of the plant model Arabidopsis thaliana was investigated by electron microscopy for the first time. The data described here could constitute a reference for future investigations of Arabidopsis mutants. During the beginning of meiosis the megaspore mother cell shows a polarity created by unequal distribution of organelles in the cytoplasm. Plastids accumulate...
AbstractIn this paper, we describe a novel plant mutant affected exclusively in the female mitosis-meiosis switch. The major effect of the swi1 mutation in Arabidopsis thaliana L. is to delay megasporogenesis events by inserting additional mitotic divisions of the mega- sporocyte. As a result of this delay, megagametogenesis is also affected. The absence of cellular polarity in the megasporocytes...
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