Precursors for Biosynthesis

Biosynthesis of Gibberellins:- Synthesis of gibberellins begins with acetate molecule. Acetate is esterified with coenzyme (CoA) to form three acetyl coenzyme A (acetyl Co A) molecules which undergoes a series of condensing reactions to β-hydroxyl-β-methyl glutaryl CoA (BOG-CoA).

Biosynthesis of Ethylene:- Ethylene is known to be synthesized in plant tissues from the amino acid methionine. A non-protein amino acid, 1-amino cyclopropane-l-carboxylic acid (ACC) is an important intermediate and also immediate precursor of ethylene biosynthesis. The two carbons of ethylene molecule are derived from carbon no. 3 and 4 of methionine.