Gibberellin biosynthesis and inactivation

Abstract

The gibberellins (GAs1) are defined by chemical structure. Naturallyoccurring tetracyclic diterpenoid acids with structures based on the entgibberellane carbon skeleton (Fig. 1) are assigned gibberellin A numbers in chronological order of their identification (45) (http://www.planthormones.info/gibberellin-nomenclature.htm). At the present time there are 136 fully characterized GAs, designated gibberellin A1 (GA1) through GA136, that have been identified from 128 different species of vascular plants, and also from seven bacteria and seven fungi (44) (http://www.planthormones.info/ga1info.htm).