1. Gibberellins are growth promoting hormones and were isolated form fungus Gibberella Jujikuroi by Kurasawa.
2. Rice plants when infected with this fungus show stem elongation i.e. Bakane disease.
3. Yabuta and Sumuki isolated gibberellins in crystalline form, from fungal culture and named it gibberellins.
4. Gibberellins are synthesized from mevalonic acid at young leaves, seeds, root and stem tips and show non-polar transport.
