- A Japanese farmer in his rice field found a seedling that is extremely tall, he named it as Bakanae means ‘foolish seedling’.
- Kurosawa showed that it was due to an infection by fungus Gibberella fujikorai (Fusarium monoliforme).
- Yabuta & Sumuki isolated it & named it as Gibberellins.
- Chemically it is Gibberellic acid (C19H22O6).
- More than 100 different types of Gibberellins are known, of which GA3 is the most common.
- Precursor of gibberellins: Mevalonic acid (derived from Acetyl CoA).
- Site of synthesis: shoot buds, young leaves & developing seeds.
- Transported by simple diffusion.