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Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what significance is this experiment?
A
It made possible the isolation and exact identification of auxin
B
It is the basis for quantitative determination of small amounts of growth-promoting substances
C
It supports the hypothesis that IAA is auxin
D
It demonstrated polar movement of auxins
Detailed Solution
Went's Avena curvature test showed that the degree of bending is proportional to the amount of auxin diffused into the agar.
It is therefore the basis for the quantitative estimation (bioassay) of small amounts of growth-promoting substances.
It is therefore the basis for the quantitative estimation (bioassay) of small amounts of growth-promoting substances.