Question

The sub aerial stem modification that grows aerially for some time and then bends downwards to touch the ground is observed in

• A. jasmine
• B. Pistia
• C. Cynodon
• D. banana

Answer 1

The correct option is A jasmine

Stolons grow aerially for some time and then bend downwards to touch the ground. The terminal bud gives rise to a new stem and adventitious roots. Stolon arises from the base of the main stem. Eg: Jasmine.

Offsets are shorter and thicker and are found in aquatic plants. They grow horizontally. The leaves are produced above and the adventitious roots below. Eg: Pistia.

Runner is a sub aerial modification of a stem that runs horizontally on the surface of the soil. The nodes have scale leaves, adventitious roots, and axillary buds. Runners arise from the axillary buds. Eg: Cynodon.

Sucker is a sub aerial stem modification that arises from the basal part of the main stem. Before separating from the original plant, it develops adventitious roots and leafy shoots. It grows horizontally under the soil for a distance and then grows obliquely upwards. Eg: Banana.