First successful tissue culture was that of

Options

A. Tamato root
B. Carrot root
C. Potato stem
D. Tabacco callus

Answer

**Step-by-Step Solution:**

1. **Understanding Tissue Culture**: Tissue culture is a technique used to grow cells, tissues, or organs in a controlled environment outside the organism. This technique allows scientists to study the growth and behavior of cells in a nutrient medium.

2. **Identifying the Scientist**: The first successful tissue culture was conducted by a scientist named White. It is important to note the contributions of scientists in the field of tissue culture.

3. **Experiment Details**: White experimented with tomato roots. He placed these roots in a nutrient medium that contained vitamins, which is essential for cell growth and division.

4. **Formation of Callus**: During the experiment, White was able to develop a continuously growing callus from the tomato roots. A callus is a mass of undifferentiated cells that can develop into different types of tissues.

5. **Properties of Totipotency**: The cells from the tomato roots exhibited totipotency, meaning they have the ability to differentiate into any cell type. This characteristic is crucial for the success of tissue culture.

6. **Hormonal Treatment**: White treated the callus with hormones. Auxin was used to promote rooting, while cytokinin stimulated cell maturation and differentiation, leading to the development of stems.

7. **Conclusion**: Based on the experiment and findings, the first successful tissue culture was that of tomato roots.

**Final Answer**: The first successful tissue culture was that of **A. Tomato root**.

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