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FREEZE‐ETCH ULTRASTRUCTURE OF A PROCHLORON SPECIES ‐ THE SYMBIONT OF DIDEMNUM MOLLE
Author(s) -
COX GUY,
DWARTE D. M.
Publication year - 1981
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.1469-8137.1981.tb04091.x
Subject(s) - thylakoid , chloroplast , ultrastructure , biology , botany , vacuole , photosynthesis , biophysics , microbiology and biotechnology , biochemistry , cytoplasm , gene
SUMMARY A species of Prochloron , a genus of photosynthetic prokaryotes containing chlorophylls a and b and lacking phycobilins, has been investigated by the freeze‐etch technique and thin sectioning. The thylakoids show a high level of stacking; particle distributions on fracture faces of the membranes resemble those of chloroplasts more than those of cyanophytes. Polyhedral bodies (carboxysomes?) are surrounded by a unit membrane which probably derives from the thylakoids. Vacuole‐like areas are seen in freeze‐etch replicas to contain a structured substance, probably a reserve material.