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THE FLORAL AND EXTRA‐FLORAL NECTARIES OF PASSIFLORA. II. THE EXTRA‐FLORAL NECTARY
Author(s) -
Durkee Lenore T.
Publication year - 1982
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.1537-2197.1982.tb13390.x
Subject(s) - nectar , biology , phloem , botany , parenchyma , sieve tube element , passiflora , vascular bundle , pollen
Extra‐floral nectaries of nine species of Passiflora were studied with light and electron microscopy prior to and during secretion. There is no evidence of ER or Golgi participation in the secretion of nectar. The vascular tissue supplying the nectary is characterized by companion and phloem parenchyma cells which are usually larger than the sieve elements, a configuration similar to that found in leaf minor veins. In the petiolar nectaries, large masses of membrane‐bound protein are commonly found in these cells. This protein is absent in laminar nectaries.