Bacillus subtilis bacterium endospore

Bacillus subtilis bacterium endospore

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Caption: Transmission electron micrograph (TEM) of a thin section through an endospore of Bacillus subtilis (the "hay bacillus"), a species of aerobic, rod- shaped, gram positive bacteria. Endospores (resting cells) are produced in response to nutritional deficiency & adverse conditions, and may later germinate to form a vegetative bacterial cell, if conditions improve. The image shows the thick outer spore coat overlying an layered inner coat. Around the central cytoplasm is a thin membrane that is surrounded by the cortex (lightly stained); central nuclear material appears darkly stained & is typically arranged in filaments. Magnification: X 170,000 at 10x8 size.

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Keywords: aerobic bacteria, bacillus subtilis, bacteria, bacterial, bacteriology, bacterium, electron micrograph, endospore, gram-positive bacteria, hay bacillus, micro-organisms, microbe, microbes, microbiology, tem, transmission

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