فهرست نشریات علمی دسترسی آزاد ایران

Essence of oil secretory cavities (glands) have been reported in all Citrus species of the Rutaceae family. The present study has focused on the histological aspect of the oil gland ontogeny during flower and fruit development in lemon(Citrus limon(L.)Burm.f.). Samples taken at six successive ontogenic stages were processed according to routine transmission electron microscope procedure, and viewed under the light microscope. Oil glands in sepals, petals and ovary wall appeared different time intervals, but showed the same histological aspect. In fruits, oil gland appearance was restricted to the immature stage. No new gland was formed during the fruit maturation process, and the preformed ones continued to enlarge. Secretory glands of the flower and fruit peel showed a similar developmental pattern and separated into four stages, based on cell features and the degree of gland differentiation. Oil gland ontogeny started from the divisions in some epidermal and hypoepidermal cells, and ended with an expended central cavity. The flattened cells bordering the central cavitiy were structurally distinguishable and had probably different functions. Wall separation and autolysis overlapped each other the oil gland ontogeny in Citrus limon is therefore of schizolysigenous type.