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THE FINE STRUCTURE OF THE POLLEN WALL OF TILIA PLATYPHTLLOS
Author(s) -
CHAMBERS T. C.,
GODWIN H.
Publication year - 1961
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1961.tb06263.x
Subject(s) - microspore , pollen , cytoplasm , electron microscope , tilia , botany , biology , biophysics , optics , physics , microbiology and biotechnology , stamen
S ummary Thin sections of the pollen wall of Tilia platyphyllos and T. europaea have been studied by electron microscopy and it has proved possible to obtain both serial transverse sections and surface sections. An attempt has been made to relate the electron micrographs to the structures seen under the light microscope. It appears that an inner and an outer layer of the exine are joined by a system of hollow funnels and pillars crossing a cavity or void occupied by cytoplasm. In terms of density to an electron beam no support can be found for the idea that the exine is made up of layers of inherently different properties, nor for the present complex nomenclature applied to light microscope interpretations of pollen‐wall structure. Tapetal cytoplasm has been found to be continuous with cytoplasm in the wall of the pollen grain, and spheroids comparable with those described by Rowley et al . (1959) have been found associated with the tapetal strands surrounding the developing microspores.