FIG. 2 in Morphological and molecular characterization of Goleter sp. (Nostocales, Nostocaceae) isolated from freshwater in Iran

FIG. 2. — Micrographs of the isolate Goleter sp. in culture: A, older filaments featuring end cells with two corner "spines"; B, "spines" absent in young filaments; trichomes appear branched due to the proliferation of hormogonia derived from the main filaments; C, granular cell contents; D, filament uniseriate, biseriate or multiseriate; E, necridium cells occasionally found in the main filaments. Reproduction occurs via uniseriate hormogonia with two corner "spines" and bristles. Akinetes very rare; F, long branching filaments with prostrate main axes; G, trichomes often aggregate into subspherical multiseriate clumps. Heterocytes bone, shaped and spherical.Monocyte reproductive cells observed. Abbreviations:aki, akinete;biser, biseriate;brch, branching;clum, clump;gran, granules;het b, bone shaped heterocytes; het s, spherical shaped heterocytes; hor, hormogonium; mono, monocyte; multis, multiseriate; nec, necridium; non spi, "spines" absent; relea, released granules; spi, two corner "spines"; unise, uniseriate. Scale bars: 10 µm.