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Growth on cyanobacteria media that lacked both nitrogen
and carbon sources indicated that the organism(s) were nitrogen-fixing
and photosynthetic. |
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Gram stain of cyanobacteria at 40x. The pink color of
the filaments indicated that organism was Gram negative. |
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Cyanobacteria viewed at 40x. Wet mount. Note
the unbranched, unsheathed filaments. |
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Wet mount of cyanobacteria, viewed at 100x. Within
chains of cells, morphologically distinct cells present, specifically larger,
round, brownish cells called heterocysts. |
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Wet mount of sample taken from cyanobacteria plates.
Presence of diatoms (brown cells) in combination with cyanobacteria filaments
demonstrates an impure sample. |
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Wet mount of sample taken from cyanobacteria plate, 100x.
Developmental stage confirmed by presence of smaller chains of cells without
cell differentiation. Motility was also observed. |