FILAMENT FORMATION IN THE DIATOM MELOSIRA GRANULATA

摘要: The frequency and position of separation valves in filaments Melosira granulata were observed both laboratory cultures natural habitats. numerical relationship between mean filament length a population the proportion produced (the valve index-SVI) has also been determined. data indicate that is controlled through production SVI gives an indication length. Two series cell divisions first producing valves) are necessary before can occur. Paris occur predominantly towards middle filament. We suggest may prove to be useful indicator length, hence ecological change, even when no longer intact, as, for example, sediment core samples on permanent slides acid-cleaned collections.