HORTICULTURE

Detailed explanation-1: -The tubers survive in winters till spring. On arrival of appropriate conditions, the tubers propagate. The stored food in tubers is used to grow stems. Therefore, the potato is an underground stem because it possesses axillary buds called eyes.

Detailed explanation-2: -Rhizomes are underground stems which grow beneath the surface of soil; they are frequently fleshy and serve as organs of food storage. Sometimes the rhizomes are condensed into solid swollen forms which are then known as corms. The tubers are also underground parts, which may either be modified roots or stems.

Detailed explanation-3: -Examples of underground stems include corms, such as taro (left); rhizomes, such as ginger (center); and tubers, such as potatoes (right).

Detailed explanation-4: -tuber, specialized storage stem of certain seed plants. Tubers are usually short and thickened and typically grow below the soil. Largely composed of starch-storing parenchyma tissue, they constitute the resting stage of various plants and enable overwintering in many species.

Detailed explanation-5: -(a) The thickened and swollen stem or root of a plant that stores food and is present underground is called a tuber. For example, the potato is a stem tuber and sweet potato is a root tuber.