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ULTRASTRUCTURAL DIFFERENTIATION OF THE MÜLLERIAN BODY GLYCOGEN PLASTID OF CECROPIA PELTATA L.
Author(s) -
Rickson Fred R.
Publication year - 1976
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.1537-2197.1976.tb13211.x
Subject(s) - biology , glycogen , ultrastructure , plastid , organelle , microbiology and biotechnology , chloroplast , cell division , cell , biochemistry , botany , gene
The developmental ultrastructure of the glycogen plastids produced in Müllerian body cells of Cecropia peltata was studied. Cells of the trichilium, before Müllerian body initiation, possess chloroplasts. Once cell division begins in the initiation of a food body, the choroplasts dedifferentiate to proplastids. As cell division and development proceed the proplastids divide and enlarge so that each cell of the Müllerian body contains 20–30 of these organelles. With maturation of a Müllerian body the proplastids begin to synthesize and store glycogen. Each developing glycogen plastid possesses an inclusion composed of protein and glycogen, and, based on cytochemical evidence, it is suggested that the glycogen synthesizing enzymes are associated with this inclusion.