[The salt-glands ofLimonium vulgare : I. The fine structure]

Abstract

The fine structure of the salt-glands in the leaf epidermis ofLimonium vulgare was investigated. The glands are very similar to those ofStatice Gmelini (RUHLAND, 1915). The main results were as follows: 1. All gland cells have dense cytoplasma, large nuclei, numerous mitochondria and sometimes protuberances of the cell wall. 2. The passage spots in the cutinized "border cap" between the outer "cup cells" and the "collecting cells" show numerous plasmodesmata. 3. The cell wall protuberances in the gland cells often grow out in connection with plasmodesmata and not seldom include parts of the cytoplasm. 4. In the inner "cup cells" the mitochondria sometimes show paracrystalline inclusions. 5. In the gland cells (with the exception of the outer "cup cells") electron-dense belts are often formed. 6. The "border caps" under the secretion-pores have no direct contact with the protoplast of the secretion cells but are attached to the outer cell wall.