Abstract
Cellular inclusions up to 18 μm long, with a crystalline outline and periodic substructure, were found in axial filaments of Haplogloia kuckuckii Kylin. Lateral assimilatory filaments did not contain inclusions. Light-microscopic cytochemical tests indicated that the crystals were proteinaceous. Protein-staining procedures, aniline blue-black and chloramine-T Schiff's, produced positive reactions, whereas the periodic acid Schiff's test for carbohydrates gave a negative result. Transmission electron microscopy revealed crystals in the cytoplasm, each one bounded by a membrane that conformed closely to the crystal surface. The crystal matrix had a periodicity of 10 nm. Some crystals showed shells of varying matrix density, possibly representing deposition layers. Crevices and membranous tubules penetrated into the matrix from the crystal surface.The possible ecological significance of nitrogen storage in the form of protein inclusions in this and other brown algae is considered.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
