False colour transmission electron micrograph 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 and 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 and is arranged in filaments. Mag: X24300 at 35mm size. Original is bw print b220/166 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Brain, Dr. Tony |
Taille de l’image : | 2630 px × 3543 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |