Topic 9.3 Growth in plants

Auxin

a plant hormone that causes the elongation of cells in shoots and is involved in regulating plant growth.

Meristem

a region of plant tissue, found chiefly at the growing tips of roots and shoots and in the cambium, consisting of actively dividing cells forming new tissue.

Micropropagation

the propagation of plants by growing plantlets in tissue culture and then planting them out.

Shoot apex

the tip of a shoot, the apical or lateral shoot meristematic dome together with the leaf primordial, from which emerge the leaves and sub-adjacent stem tissue.

Stem

the main body or stalk of a plant or shrub, typically rising above ground, but occasionally subterranean.

Tropisms

the turning or bending movement of an organism or a part of an organism toward or away from an external stimulus, such as light, heat, or gravity.