Plant Growth and Development Question 31
31. “Foolish seedling” disease of rice led to the discovery of
(a) $ABA$
(b) 2,4-D
(c) IAA
(d) GA
Show Answer
Answer : d
Hints & Solutions
(d) The effect of gibberellins had been known in Japan since early 1800 where certain rice plants were found to suffer from bakane or bakanae (foolish seedling) disease. Such rice plants were thin, pale green, spindle-shaped, longer by $50 %$ than the healthy plants, and were sterile.
