Peculiarities of localization and accumulation of oil in hypanthium of ripening fruits of sea buckthorn (Hippophae rhamnoides L.)

A correlation between the degree of formation of the structural elements of hypanthium and the number of accumulated oil inclusions in the cells of this part of fruit has been established. It was revealed that the growth of hypanthium tissues occurs as a result of cell divisions and an increase of their volume, mainly due to mesoderm cells, alongside with an increase of the accumulation of oil in them. The maximum oil formation occurs during the period from the beginning of fruit browning to the botanic maturity, after which its synthesis decreases until the fruits reach harvesting maturity.