Powdery scab infection. Light micrograph of a section through a potato infected with powdery scab (Spongospora subterranea),showing pustules and spores. S. subterranea is a cercozoan protist that infects and destroys tubers. It causes raised brown pustules (red) on the tuber skin,which breaks and curls back over the pustule to form a brown powdery mass of spore balls (brown). Here,the lesions have formed a cork layer under the epidermis (skin,blue). Magnification: x7 when printed 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wheeler, Dr. Keith |
Bildgröße: | 5125 px × 3417 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |