Developmental Anatomy of the Floral Nectaries in Nitraria tangutorum Bobrov

Nitraria tangutorum Bobrov nectary is located in the inner petal,and it is composed of secretive epidermal cells.According to Fahn classification of nectary,it belongs to the typical perianth nectary,it is also the typical non-structure nectary based on the plant anatomy.It belongs to the non-starch nectary because starch dynamic is not obvious during dying.The secretive epidermal cells are specialized to secretive trichomes,and the secretory cavity is formed by the split of the original secretive cells during the development of nectary.The surface of the epidermis is covered with the cuticle.During the development of epidermis,the vacuole,which takes part in polysauharides decomposation transportation of honey etc.,changes regularly relating to the law of the formation and secretion of the honey.The starch and glycogen are not obvious.Finally,honey is secretive by epidermal cells from secretive cavity.The secreting trichomes come off by the perianth after flowering,so the nectary stops secreting.