Thursday 17 May 2012

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.

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