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Developmental anatomy of the three-dimensional structure of the vegetative shoot apex

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Abstract

There have been many studies of the vegetative shoot apex, but the majority of such studies have been based on median longitudinal sections. Anatomical studies based on surface views of the apex are relatively few in number. Unfortunately, three-dimensional structures, based on surface and transverse-sectional views as well as longitudinal views, have scarcely been analyzed. However, Hara attempted such analyses (1961, 1962, 1971a, b, c, 1977). He identified radial files of cells in the peripheral meristem and recognized four or five apical sectors in the three-dimensional structure of the shoot apex. The size of the central zone and the sizes and relative positions of the sectors change rhythmically in each plastochron. Further studies on the three-dimensional structure of the shoot apex are needed if we are fully to understand the morphogenesis and histogenesis of vascular plants.

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Hara, N. Developmental anatomy of the three-dimensional structure of the vegetative shoot apex. J. Plant Res. 108, 115–125 (1995). https://doi.org/10.1007/BF02344315

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