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CORRELATED LIGHT AND ELECTRON MICROSCOPE STUDIES ON BROWN ALGAE
Author(s) -
EVANS L. V.,
HOLLIGAN M. SUSAN
Publication year - 1972
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.1469-8137.1972.tb01995.x
Subject(s) - thallus , chloroplast , botany , plastid , brown algae , biology , algae , photosynthesis , fucales , cytoplasm , electron microscope , tannin , vesicle , cyanobacteria , microbiology and biotechnology , biochemistry , bacteria , membrane , physics , genetics , optics , gene
S ummary The physodes or fucosan vesicles abundant in vegetative and reproductive cells of the brown seaweed Dictyota originate in the plastids. Precursor material expelled from the chloroplast matrix, may run together to produce the large physodes in the cell cytoplasm. Staining reactions indicate that the physodes are phenolic or tannin‐like in nature. They may be products of photosynthesis. Physodes in the apical region of thalli are exceedingly resistant and stable compared with those in older parts of thalli; the latter are lost during glutaraldehyde fixation.