It is otherwise known as ‘wound hormone’. It is an open-chain dicarboxylic acid with a single double bond.
It induces meristematic activity near injured tissue which divides till the injured part is healed.
Calines:
Some recent indirect evidence suggests the presence of substances those are needed for initiation of the actions of auxins. These are collectively called as calines or formative hormones. Examples of postulated caulines are:
ADVERTISEMENTS:
A. Rhizocaline – Root forming
B. Caulocaline – Stem forming
C. Phyllocaline – Stimulates mesophyll formation in leaves.