Change in ultrastructure of apical cells in wheat shoots in ontogenesis.

Electron microscopy and morphometric studies were made of apical meristem cells of a shoot of wheat (Triticum aestivum L., variety Saratovskaya-29) at various phases of ontogenesis: vegetative, prefloral, and beginning of flowering (from seed embryo to the beginning of formation of the head). It was demonstrated that during this period there are changes in cytoplasmic structures, their number, proportions, and internal structures.