Its active form is produced by oxidation of a product of violaxanthin breakdown, ABA aldehyde.
First characterized in 1963, this hormone consists of a sesquiterpenoid partially produced through the mevalonic acid pathway. Its active form is produced by oxidation of a product of violaxanthin breakdown, ABA aldehyde. Its production is stimulated by stresses and its transport occurs in a non-polar manner through both xylem and phloem with translocation through parenchymal cells. Major effects include inhibiting shoot growth with a minimal effect on root growth, inducing seeds to synthesize storage proteins, and inducing gene transcription for proteinase inhibitors in response to wounding. FTP, name this plant hormone once known as dormin for its induction and maintenance of dormancy and best known for its role in the dehiscence of fruits and the falling of leaves.
First characterized in 1963, this hormone consists of a sesquiterpenoid partially produced through the mevalonic acid pathway.
abscisic acid (or abscissin; accept dormin before it's mentioned)