Structural Aspects of the Salt Glands of the Plumbaginaceae |
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Authors: | FARADAY, CHRISTOPHER D. THOMSON, WILLIAM W. |
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Abstract: | Faraday, C. D. and Thomson, W. W. 1986. Structural aspects ofthe salt glands of the Plumbaginaceae.J. exp. Bot. 37:461470. The epidermal salt-secreting glands of 11 species from six differentgenera within the Plumbaginaceae were examined Gland ultrastructurewas considered with respect to species, secretory activity,and secretory product. All mature glands had a similar ultrastructure.Cytoplasmically dense secretory cells contained a full complementof organelles and structures which included numerous mitochondriaand few plastids. Reconstruction of serial paradermal sectionsthrough entire glands revealed that each gland cell generallycontained one or two vacuoles with a convoluted tonoplast inboth secreting and non-secreting states. The absence of numerousvacuoles and vesicles during secretory activity suggested thation secretion was by a transmembrane pathway rather than bya vesicle-mediated pathway. Key words: Salt glands, ultrastructure, Plumbaginaceae |
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