Abstract
Electron microscopic observations carried out on Nostoc commune Vauch. in culture show that during development the extracellular investment undergoes evident modifications in size and structure. Since the investment of the motile hormogonium shows the characteristics of a “slime” and those of the nonmotile hormogonium and the biseriate stage show the characteristics of a “sheath,” the meaning of these two terms is discussed. In the slime, the existence of a reticular structure with polygonal meshes is recognized and is to be considered the structural basis of the organization of the investment. The transformation from slime to sheath takes place through a gradual diminution in the size of the meshes with a consequent increase of the fibril aggregation. The possibility is considered that slime-sheath reversibility as well as cessation of motility are related with modifications in the cellular secretion.
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.
