Cut surface of a raw potato

Bildnummer 13387368
Cut surface of a raw potato
The cut surface of a raw potato, Solanum tuberosum. The picture, taken in a scanning electron microscope, shows the surface of a sliced raw potato. The green areas are surface cell walls; the basal walls where visible are red. The blue particles inside the cells are starch grains. The liquid contents of the cells are absent; the specimen was photographed in a vacuum. A potato is a tuber; botanically, an underground stem modified for storage and vegetative reproduction. The starch within the cells provides an energy source for the growth of buds (eyes"") at the surface of the tuber. Nutritionally, the potato provides energy from carbohydrates in the starch, dietary fibre from the cellulose in the cells walls, as well as minerals and Vitamin C. Originally from the Andes, potatoes are now a food staple in many parts of the world"
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Burgess, Dr. Jeremy
Bildgröße: 5212 px × 3468 px
Modell-Rechte: nicht erforderlich
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