Tissue origins, cell lineages and patterns of cell division in the developing dermal system of the frut of Vitis vinifera L.

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Abstract
Cell division during development of the dermal system of fruit of the grape cv. Gordo is confined to the first growth period. The epidermis is conserved with anticlinal proliferative cell divisions providing for increase in cell number. The hypodermis is the layer of origin of the collenchymatous dermal system. Six or seven layers are differentiated by periclinal cell divisions early in the first growth period, and later increase in size is obtained by proliferative anticlinal cell divisions. These observations are related to developmental and genetic control of fruit shape and volume.