Knowledge about cytokinin was gained after skoog's work on

Options

A. Tomato pith
B. Tobacco pith
C. Rice seedling
D. Avena curvature test

Answer

**Step-by-Step Solution:**

1. **Understanding Cytokinins**: Cytokinins are a class of plant hormones that play a crucial role in promoting cell division and growth in plants. They are involved in various plant processes, including shoot and root development.

2. **Historical Context**: The discovery of cytokinins is attributed to the work of scientists Folke Skoog and Carlos Miller in the 1950s. Their research focused on understanding how certain substances can influence plant growth.

3. **Experimental Setup**: Skoog and Miller conducted experiments using tobacco pith, which is the soft tissue found in the stems of tobacco plants. This tissue was chosen because it is rich in the necessary cellular components to study growth factors.

4. **Findings from Tobacco Pith**: Through their experiments with tobacco pith, Skoog and Miller were able to isolate a substance that promoted cell division. This substance was later identified as cytokinin. Their work demonstrated that cytokinins could stimulate the growth of plant cells.

5. **Conclusion**: Based on Skoog's experiments with tobacco pith, knowledge about the cytokinin hormone was gained. Therefore, the correct answer to the question is that knowledge about cytokinin was gained after Skoog's work on tobacco pith.

**Final Answer**: The knowledge about cytokinin was gained after Skoog's work on **tobacco pith**.

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