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FINE STRUCTURE OF THE ENDOTHECIUM AND DEVELOPING XYLEM IN PHASEOLUS VULGARIS
Author(s) -
WHATLEY JEAN M.
Publication year - 1982
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.1469-8137.1982.tb03334.x
Subject(s) - xylem , phaseolus , golgi apparatus , endoplasmic reticulum , botany , cell wall , cytoplasm , thickening , plasmolysis , biology , ultrastructure , microbiology and biotechnology , organelle , chemistry , polymer science
SUMMARY Differentially thickened wall bars are formed in cells of the anther endothecium as well as in the xylem. In Phaseolus vulgaris both types of wall bar appear to be lignified. As thickening takes place, Golgi bodies become numerous, endoplasmic reticulum proliferates and both types of organelle occupy characteristic sites within the cell. Thickening begins at an early stage of xylem development but in the endothecium it is long delayed. Subsequent loss of cytoplasm is associated with increasing vacuolation of xylem elements, but may be associated with plasmolysis in the endothecium.