Question

Gibberellin was first extracted from ______.

Options

• Gibberella fujikuroi

• Gellidium

• Gracillaria

• Aspergillus

Answer 1

Gibberellin was first extracted from Gibberella fujikuroi.

Explanation:

Gibberellin was first identified and extracted by Japanese scientists studying the bakanae (or foolish seedling) disease in rice crops, which caused plants to grow abnormally tall and spindly. They discovered that this hyper-elongation was triggered by a chemical substance secreted by the infecting parasitic fungus, Gibberella fujikuroi (also known as Fusarium moniliforme). In the 1930s, researchers Teijiro Yabuta and Sumuki successfully isolated the active growth-promoting compound from this fungal filtrate and named it gibberellin.