NEETBotanyPlant - Growth and Development
Who among the following scientists was the first to successfully isolate auxin, and from which specific plant source was it obtained?
Options
- ACharles Darwin from the coleoptiles of canary grass
- BF.W. Went from the tips of coleoptiles of oat seedlings
- CE. Kurosawa from infected rice seedlings
- DF. Skoog from the internodal segments of tobacco stems
Correct answer
B. F.W. Went from the tips of coleoptiles of oat seedlings
Step-by-step solution
According to NCERT, while Charles Darwin and Francis Darwin first observed the phenomenon of phototropism in the coleoptiles of canary grass, it was F.W. Went who successfully isolated the active substance (auxin) from the tips of coleoptiles of oat (Avena) seedlings. The other options represent different milestones: Charles Darwin is associated with the initial observation of phototropism, E. Kurosawa with the discovery of gibberellins in rice seedlings, and F. Skoog with the discovery of cytokinins using tobacco