. Advances in marine biology: volume 17. Coral fisheries. ECOLOGY AND TAXONOMY OF Holimeda 185. Fig. 56. H. 7nonile. Cross-section of a filament from an old, white suprabasal segment, showing the much thickened wall of some of the filaments, spherical body (s), and aragonite crystals filling the segment space. The density of cytoiDlasmic organelles appears to be comparatively low in old, white, heavily calcified segments. A jDortion of a filament with wall of more usual thickness appears on right-hand side. Stained with lead tartrate. Scale bar is 0-1 [ 3. Old basal segments In these segme
. Advances in marine biology: volume 17. Coral fisheries. ECOLOGY AND TAXONOMY OF Holimeda 185. Fig. 56. H. 7nonile. Cross-section of a filament from an old, white suprabasal segment, showing the much thickened wall of some of the filaments, spherical body (s), and aragonite crystals filling the segment space. The density of cytoiDlasmic organelles appears to be comparatively low in old, white, heavily calcified segments. A jDortion of a filament with wall of more usual thickness appears on right-hand side. Stained with lead tartrate. Scale bar is 0-1 [ 3. Old basal segments In these segments, which occur mostly on perennating thalli or old thalU, the filament wall may be considerably thickened, up to at least 2 [Jim, and stratified (Fig. 56), although there is also local thickenmg in younger material. Amyloplasts are relatively prominent m some of the material as are spherical bodies (Wilbur et al., 1969). 4. Wounding response Siphonaceous algae, when wounded, quickly produce a yellowish material often referred to as a callose or mucilagenous substance. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hillis-Colinvaux, Liewellya. London : Academic Press ; Toronto
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