In 1926, Kurosawa and colleagues extracted a compound from a fungus that caused abnormal growth in rice seedlings that eventually led to the death of the plants. Gibberellin was the plant hormone found in the extract and was responsible for the disease symptoms.
- A group of plant hormones known as gibberellin promotes germination, flowering, and stem elongation.
- When rice farming in Japan was being harmed by the Bakanae (foolish seedling) illness in antiquity, Gibberellins were first discovered.
- It led to the rice seedlings being longer and developing pale yellow leaves, which reduced the yield.
- Kurosawa, a Japanese scientist, was attempting to determine why and how Gibberella fujikuroi, a fungus, was producing these alterations in plants.
- He was successful in filtering the fungal extract that was discovered to be in charge of the disease's onset.
- Then, in 1935, Yabuta separated the active ingredient and gave it the names gibberellins A and B. This crystalline form of the active ingredient was remarkably heat stable.
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