PLANT HARMONES

PLANT HARMONES

Auxins:

EFFECTS

Cell elongation.

Increase in stem length.

Promotion of adventitious root growth.

Fruit setting in the absence of pollination.

USES

[low]

Accelerate the rooting of woody cuttings

E.g. Trees raised from cuttings instead of seeds

[high]

@@@@Acts as a selective HERBICIDE or weed-killer.

Gibberellins:

Uses: Initiates the synthesis of enzymes needed for seed Germination & seedling establishment.

Cytokinins:

Uses

Play an important role in cell division.

Promote @@PROTEIN synthesis.

Involved in bud differentiation.