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Intercalary located akinete of Dolichospermum smithii Terminally located akinete of Gloeotrichia. An akinete is an enveloped, thick-walled, non-motile, dormant cell formed by filamentous, heterocyst-forming cyanobacteria under the order Nostocales and Stigonematales.
Abbreviations: hc - heterocyst, ak - akinete, hm - hormogonium, nd - necridia Heterocysts or heterocytes are specialized nitrogen-fixing cells formed during nitrogen starvation by some filamentous cyanobacteria , such as Nostoc , Cylindrospermum , and Anabaena . [ 1 ]
Spherical colonies of radiating straight trichomes (filaments without sheaths). Each trichome has an akinete as the basal cell near the center of the colony. Akinetes if present are adjacent the heterocyst. The primary morphology is trichomous (filamentous without sheaths), the secondary is colonial. The mucilaginous sheath is top short at the ...
Cyanobacterial cell division and cell growth mutant phenotypes in Synechocystis, Synechococcus, and Anabaena.Stars indicate gene essentiality in the respective organism. While one gene can be essential in one cyanobacterial organism/morphotype, it does not necessarily mean it is essential in all other cyanobacteria.
Bacteria display a large diversity of cell morphologies and arrangements.. Bacterial cellular morphologies are the shapes that are characteristic of various types of bacteria and often key to their identification.
Cylindrospermopsis raciborskii is a filamentous cyanobacteria with the ability to fix nitrogen by converting atmospheric nitrogen (N2) into ammonia (NH3), thus distinguishing it as a heterocyst. [5] It provides the cells in the filament with nitrogen for biosynthesis by fixing nitrogen from dinitrogen (N2) using the enzyme nitrogenase. Normally ...
However, filamentous heterocyst-forming cyanobacteria (e.g., ... such as akinete and heterocyst differentiation, as well as strategy for population survival. ...
Nostoc, also known as star jelly, troll's butter, spit of moon, fallen star, witch's butter (not to be confused with the fungi commonly known as witches' butter), and witch's jelly, is the most common genus of cyanobacteria found in a variety of both aquatic and terrestrial environments that may form colonies composed of filaments of moniliform cells in a gelatinous sheath of polysaccharides. [1]