Question:
Which one of the following scientists is NOT associated with early experiments in plant hormone auxin research?
Which one of the following scientists is NOT associated with early experiments in plant hormone auxin research?
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The order of Auxin discovery: Darwin $\rightarrow$ Boysen-Jensen $\rightarrow$ Paal $\rightarrow$ Went.
Remember Skoog = Cytokinin/Tissue Culture.
Remember Skoog = Cytokinin/Tissue Culture.
Updated On: Aug 21, 2026
- Charles Darwin
- Boysen-Jensen
- F. W. Went
- Folke Skoog
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
The question asks to identify the scientist who is primarily associated with a different hormone and was not part of the historic chain of experiments leading to the discovery and isolation of Auxin.
Detailed Explanation:
• Scientists in Auxin Discovery:
Charles Darwin (and Francis Darwin): In 1880, they observed that the tip of a canary grass coleoptile is sensitive to light and sends a signal to the lower part, causing bending (phototropism).
Boysen-Jensen: In 1913, he showed that the signal is a chemical that can pass through a gelatin block but not a mica sheet.
F.W. Went: In 1928, he successfully isolated the substance in agar blocks and performed the Avena curvature test, naming the substance "Auxin."
• Folke Skoog (The Outlier):
Folke Skoog is a legendary plant physiologist, but his most famous early work was in the 1950s regarding the discovery of Cytokinins (Kinetin) and the development of the Murashige-Skoog (MS) medium.
While he worked on auxin-cytokinin interactions, he is not considered part of the "early" auxin discovery timeline of 1880-1930.
Step 2: Final Answer:
Folke Skoog is primarily associated with Cytokinins, not the early discovery of Auxin.
The question asks to identify the scientist who is primarily associated with a different hormone and was not part of the historic chain of experiments leading to the discovery and isolation of Auxin.
Detailed Explanation:
• Scientists in Auxin Discovery:
Charles Darwin (and Francis Darwin): In 1880, they observed that the tip of a canary grass coleoptile is sensitive to light and sends a signal to the lower part, causing bending (phototropism).
Boysen-Jensen: In 1913, he showed that the signal is a chemical that can pass through a gelatin block but not a mica sheet.
F.W. Went: In 1928, he successfully isolated the substance in agar blocks and performed the Avena curvature test, naming the substance "Auxin."
• Folke Skoog (The Outlier):
Folke Skoog is a legendary plant physiologist, but his most famous early work was in the 1950s regarding the discovery of Cytokinins (Kinetin) and the development of the Murashige-Skoog (MS) medium.
While he worked on auxin-cytokinin interactions, he is not considered part of the "early" auxin discovery timeline of 1880-1930.
Step 2: Final Answer:
Folke Skoog is primarily associated with Cytokinins, not the early discovery of Auxin.
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