Autor(en)
Hammond, Charles T; Mahlberg, Paul G
Titel
Ultrastructural Development of Capitate Glandular Hairs of Cannabis Sativa L. (Cannabaceae)
Teil von
  • American journal of botany, 1978-02-01, Vol.65 (2), p.140-151
Ort / Verlag
American Botanical Society
Links zum Volltext
Quelle
JSTOR Life Sciences
Beschreibungen
The capitate-sessile and capitate-stalked glands of the glandular secretory system in Cannabis, which are interpreted as lipophilic type glandular hairs, were studied from floral bracts of pistillate plants. These glands develop a flattened multicellular disc of secretory cells, which with the extruded secretory product forms the gland head and the auxiliary cells which support the gland head. The secretory product accumulates beneath a sheath derived from separation of the outer wall surface of the cellular disc. The ultrastructure of secretory cells in pre-secretory stages is characterized by a dense ground plasm, transitory lipid bodies and fibrillar material, and well developed endoplasmic reticulum. Dictyosomes and dictyosome-derived secretory vesicles are present, but never abundant. Secretory stages of gland development are characterized by abundant mitochondria and leucoplasts and by a large vacuolar system. Production of the secretory product is associated with plastids which increase in number and structural complexity. The plastids develop a paracrystalline body which nearly fills the mature plastid. Material interpreted as a secretion appears at the surface of plastids, migrates, and accumulates along the cell surface adjoining the secretory cavity. Extrusion of the material into the secretory cavity occurs directly through the plasma membrane-cell wall barrier.
Format
Sprache(n)
Englisch
Identifikator(en)
ISSN: 0002-9122
ISSN: 1537-2197
DOI: 10.1002/j.1537-2197.1978.tb06051.x
Links zum Inhalt
Schlagwörter
Cannabis, Cell walls, Cells, Epidermal cells, Plant cells, Plastids, Secretion, Secretory cells, Skin glands, Vacuoles
Systemstelle
Signatur

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