부산대학교 도서관

Nod.u.la' ri.a. L. adj. nodulus diminutive of nodus, small and knotty, knobby; L. n. arium place; M.L. fem. n. Nodularia knobby microbial filament. Cyanobacteria / Subsection IV / Subsection IV.I / Form‐ Nodularia The trichomes, motile or immotile, are composed of vegetative cells that are shorter than broad (“discoid” or “disk‐like”) and may be enclosed in a thin sheath layer. Terminal cells do not differ from intercalary cells. Heterocysts and akinetes are similar in shape to the vegetative cells but often appear compressed. Differentiation of heterocysts takes place predominantly in intercalary positions. Akinetes are initiated usually distant from heterocysts and may occur in short chains. Structurally distinct hormogonia not produced. Planktonic members exhibit gas vesicle clusters dispersed throughout the vegetative cells.