Question

Which of the following cannot serve as a vegetative propagule?

• A. A piece of potato tuber with eyes
• B. A middle piece of sugarcane internode
• C. A piece of ginger rhizome
• D. A marginal piece of Bryophyllum leaf

Answer 1

The correct option is B

A middle piece of sugarcane internode

Sugarcane is propagated vegetatively primarily through stem cuttings or sections of the stalks called "setts", that is a section of the stem with at least one bud. Each sett contains one or more buds. The buds, located in at the nodes, and give rise to embryonic shoots consisting of a miniature stalk with small leaves. Therefore the internode of a sugarcane contain no bud and cannot be used as a vegetative propagule, whereas the eyes of a potato tuber, the rhizome of ginger and the leaflets on the margin of Bryophyllum are all vegetative propagules.