Grafting experiments are not possible in monocotyledonous plants because they

Options

A. have conjoint vascular bundles
B. have less number of vascular bundles
C. Have scattered vascular bundles
D. lack cambium cells in the vascular bundles

Answer

**Step-by-Step Text Solution:**

1. **Understanding Grafting**: Grafting is a horticultural technique where a part of one plant (the scion) is joined with another plant (the rootstock) to grow together as one. This method is used to combine desirable traits from both plants.

2. **Components of Grafting**: In grafting, the rootstock provides the root system and stability, while the scion contributes the desired traits such as fruit type or flower color. The success of grafting relies on the compatibility of the vascular systems of both plants.

3. **Vascular Bundles**: Vascular bundles consist of xylem and phloem, which are essential for the transport of water, nutrients, and food within the plant. In dicotyledonous plants, these bundles are arranged in a ring and allow for secondary growth.

4. **Monocotyledonous Plants**: In contrast, monocotyledonous plants have vascular bundles that are scattered throughout the stem. They typically do not undergo secondary growth, which means they lack the cambium layer that allows for the formation of new vascular tissue.

5. **Why Grafting is Not Possible in Monocots**: The scattered arrangement of vascular bundles in monocots prevents the formation of a graft union. Without a cambium layer to facilitate the merging of vascular tissues, the scion and rootstock cannot successfully integrate, making grafting ineffective.

6. **Conclusion**: Therefore, grafting experiments are not possible in monocotyledonous plants primarily because they lack cambium cells in their vascular bundles, which is essential for the successful merging of the two plant parts.

**Final Answer**: Grafting experiments are not possible in monocotyledonous plants because they lack cambium cells in vascular bundles.

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