Sucker is a vegetative propagation by sub aerial stems.

Explanation:

Vegetative propagation is a type of asexual reproduction in plants where new individuals are produced from vegetative parts of the parent plant. It can occur through various means such as runners, cuttings, grafting, and layering. Sucker is also a type of vegetative propagation that occurs through sub aerial stems.

Definition of Suckers:

Suckers are adventitious shoots that originate from the underground stem or roots of a plant. They grow vertically above the ground and produce new plants. Suckers are also called basal shoots or root sprouts.

Examples of Plants That Produce Suckers:

1. Banana: Banana plants produce suckers that grow from the underground rhizome. These suckers can be detached from the parent plant and planted separately to form new banana plants.

2. Blackberries: Blackberry plants produce suckers that grow from the underground rhizome. These suckers can be transplanted to form new blackberry plants.

Advantages of Suckers:

1. Suckers are an efficient way of producing new plants that are genetically identical to the parent plant.

2. Suckers can be produced quickly and easily, without the need for seeds or specialized equipment.

3. Suckers can be used to propagate plants that do not produce viable seeds or are difficult to propagate by other means.

Conclusion:

Suckers are a type of vegetative propagation that occurs through sub aerial stems. They are an efficient way of producing new plants that are genetically identical to the parent plant. Suckers can be produced quickly and easily, without the need for seeds or specialized equipment.