Question

Which region of plants is considered as supply end?

• A. Root
• B. Fruit
• C. Leaf
• D. Flower

Answer 1

The correct option is C Leaf

The translocation of sugars in a plant occurs from source to sink by active loading at source or supply end and active unloading at the sink end. The source and sink are not fixed and keep on changing depending on the physiology of plant. In water transport water is always transported from roots to the aerial parts but not so in case of sugars.

Sugars are transported from a region, where they are present in high concentration, example leaves to regions of sugar utilisation or storage parts, example storage roots or tubers or fruits etc.

Thus, storage organs like tubers, roots, fruits etc. serve as sink end and leaves acts as supply end.