Preprophase Bands of Microtubules in Developing Stomatal Complexes of Sugarcane

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Abstract
The features of the preprophase bands of microtubules found in the subsidiary and guard mother cells (gmc) prior to mitosis are described. In subsidiary mother cells the 2 bands occur in complementary locations along the walls immediately above and below the gmc. The preprophase bands of the gmc are seen along the walls that are shared with the subsidiary mother cells on either side of the gmc. The preprophase bands occupy a considerable width laterally and the microtubules occur several deep in the band. These features do not give a clue as to what role the bands play either in the asymmetrical division of the subsidiary mother cell or in the symmetrical division of the gmc.