Determination of the number of cell division during development of the stomata on leaves of Prunella vulgaris Linn and Prunella webbiana Hort (Lamiaceae; Dicotyledonae)статья
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Аннотация:Stomata can develop in both species along the trimeristic or tetrameristic pathway, with reference to the size of their cells. On the whole, all of the elements of the tetrameristic stomata are reliably larger than those of the trimeristic stomata. However, the initial differences in cell size determine the greater or lesser probability of development along a certain pathway due to the absence of a correlation between the sizes of maternal and daughter cells. The final choice of the developmental pathway takes place at the stage of tertiary meristemoids: if the latter does not reach the critical size, it transforms into the maternal cell of closing cells, and if it surpasses the critical size, it continues a series of unequal cell divisions. The critical size of the tertiary meristemoids is about 40 mu m(2) and 30 mu m(2) in Prunella vulgaris and Prunella webbiana, respectively.