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ULTRASTRUCTURE OF NECTARIES IN RELATION TO NECTAR SECRETION
Author(s) -
Fahn A.
Publication year - 1979
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1979.tb06309.x
Subject(s) - nectar , biology , ultrastructure , golgi apparatus , secretion , symplast , microbiology and biotechnology , botany , endoplasmic reticulum , cell wall , biochemistry , apoplast , pollen
In the last 15–20 years, ultrastructural studies have added new important cytological information to the relatively rich literature on the morphology and light microscopy of nectaries. On the basis of these studies, the following main conclusions can be drawn regarding the relation between the ultrastructure of nectaries and the process of nectar secretion: (1) the transport of the pre‐nectar in the nectariferous tissue is mainly via the symplast; (2) the ER alone or the ER and the Golgi apparatus are involved in the process of secretion; (3) the elimination of nectar from the protoplast of the secretory cells is by reverse pinocytosis; (4) the outer walls of the secretory cells of nectaries in many plants possess wall ingrowths.