Question

Gibberellins could be extracted from

• A. Rice
• B. Fungus
• C. Diseased plant
• D. None of the above

Answer 1

The correct option is B Fungus

In the 1920s, a Japanese biologist (E. Kurosawa) was studying a disease of rice in which the young rice seedlings grew extremely tall and spindly, fell over and died. The cause of the disease was a fungus (Gibberella fujikuroi) that produces a chemical substance named as gibberellin. Not until after World War II did scientists in Europe and North America learn of the work done by the Japanese scientists. During the 1950s and 1960s, studies in the United States and Great Britain showed that gibberellins are produced by healthy plants as well as by the fungus like Fusarium.

Thus, the correct answer is option B.