Gibberellin is obtained from

Options

(a) Phytophthora infestans
(b) Gibberella fujikuroi
(c) Fusarium moniliforme
(d) Alternaria solani

Correct Answer:

Gibberella fujikuroi

Explanation:

In Japan certain rice plants were found to suffer from bakanae or foolish seedling disease. Such rice plants were thin, pale green, spindle shaped, longer by 50 % than the healthy plants and were sterile. The disease was found by Kurosawa (1926) to be caused by a fungus Gibberella fujikuroi. The fungus is the perfect stage of Fusarium moniliformae. The active substance Gibberellin was separated from the fungus by Yabuta (1938). Many of them occur naturally in plants and fungi. The precursor molecule of gibb