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SOME ASPECTS OF CARPEL STRUCTURE IN CALTHA PALUSTRIS L. (RANUNCULACEAE)
Author(s) -
Peterson R. L.,
Scott M. G.,
Miller Susan L.
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.tb06232.x
Subject(s) - locule , gynoecium , biology , trichome , ovule , anthesis , botany , pollen , anatomy , stamen , cultivar
Caltha palustris L. carpels obtained from closed flower buds, from flowers that had just reached anthesis, and from older flowers were examined by light and electron microscopy. Trichomes located on either side of the cleft towards the base of each carpel, cells along the margins of the carpel cleft, and transfer cells along the locule lining immediately beneath the micropyle of the anatropous ovule were examined. Numerous, smooth endoplasmic reticulum cisternae and dictyosomes, the presence of material between the cell wall and cuticle, and droplets of material in the region of trichomes is evidence that the trichomes are nectaries. The cells lining the cleft and the transfer cells which have wall ingrowths along the tangential wall facing the locule may be involved in the secretion of substances for pollen tube growth.