Plant Growth And Development Ques 48

48. Phototropic curvature is the result of uneven distribution of:

[2010]

(a) gibberellin

(b) phytochrome

(c) cytokinins

(d) auxin

Show Answer

Answer : d

Hints & Solutions

(d) Phototrophic curvature is the result of uneven distribution of auxin. The experiments conducted by Charles Darwin concluded that the tip of coleoptile of canary grass contain auxin that causes the bending of the entire coleoptile towards the light source.

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