Auxin influences phototropism, i.e., the growth of the plant in response to light stimulus and this phenomenon played a major role in its discovery. Charles Darwin and his son Francis Darwin observed that the coleoptile of canary grass responded to the unilateral illumination by growing towards the light source (phototropism). They concluded that the tip of coleoptile was the source of auxin and was the site of transmittable influence that caused the bending of the entire coleoptile.
The phenomenon which is influenced by auxin and also played a major role in its discovery :
NEET UG 2023 — Botany Plant - Growth and Development
2023mcqeasy
The phenomenon which is influenced by auxin and also played a major role in its discovery :
Official previous-year question
Held on 30 Apr 2023 · Verified 9 Jul 2026.
Options
- A
Gravitropism
- B
Apical Dominance
- C
Phototropism
- D
Root initiation
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