Question

Avena coleoptile test to find out the amount of growth promoting hormones was discovered by

• A. LJ.Odum
• B. F W. Went
• C. K.V Thimann
• D. F. Skoog

Answer 1

Answer: (B)

The correct option is A F W. Went
F. W. Went in 1928 used tip of Avena coleoptile. He removed the tip of Avena coleoptile and and placed in on the agar agar block for the definite measured amount of time. Then this agar agar block was placed asymmetrically on the stump, this showed a positive curvature.

When this agar agar block was placed centrally on the stump then the growth of the coleoptile was found to be renewed. He named this growth promoting substance or hormone as auxin.

He also noticed that curvature in Avena coleoptile is proportional, to the amount of auxin in agar agar block. Hence, option A is correct.