GLANDULAR TRICHOMES OF TEUCRIUM-SCORODONIA L ULTRASTRUCTURE AND SECRETION

The secretory trichomes (type I) of Teucrium scorodonia were investigated using electron microscopy. During an active phase of secretion the glandular head cells are characterized by the development of two cell compartments: the plastidome and ER. The plastids are probably involved in the synthesis of essential oil and the smooth endoplasmic reticulum, which surround the plastids, is implicated in the transport from plastids to the periplasmic space. During the secretory process the secretion is accumulated in the sub-cuticular space forming an unusual morphological feature.