Differential growth of sister nuclei in binucleate microspores of Tradescantia paludosa.
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Binucleate microspores were induced in Tradescantia paludosa with heat shocks. Nuclear and cell volumes were determined from early G1 to G2. Volumes of sister nuceli, present in a single cell, were rarely the same. It is suggested that, at least in part, nuclear volume is controlled by factors that are 1) present in nuclei, 2) not distributed equally at anaphase, and 3) not rapidly exchanged.
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