Mycorrhizae are more common in :

Options

A. Eutrophic soil
B. Oligotrophic soil
C. Both of these
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding Mycorrhizae**: Mycorrhizae are a type of mutualistic association between fungi and plant roots. In this relationship, the fungi help the plants absorb water and nutrients from the soil, while the plants provide the fungi with carbohydrates produced through photosynthesis.

2. **Identifying Soil Types**: There are different types of soils based on their nutrient content. The two types mentioned are:
- **Eutrophic Soil**: This is nutrient-rich soil that has a high concentration of minerals and nutrients. In such soil, plants can easily access the nutrients they need without the help of mycorrhizae.
- **Oligotrophic Soil**: This is nutrient-poor soil that lacks essential minerals. In this type of soil, plants struggle to obtain the necessary nutrients, making the association with mycorrhizae crucial for their survival.

3. **Analyzing the Need for Mycorrhizae**: Since mycorrhizae assist plants in nutrient absorption, they are more likely to be found in environments where nutrients are scarce. Therefore, plants growing in oligotrophic soil would benefit significantly from the presence of mycorrhizae.

4. **Conclusion**: Based on the understanding that mycorrhizae are more beneficial in nutrient-poor conditions, we conclude that mycorrhizae are more common in oligotrophic soil.

**Final Answer**: Mycorrhizae are more common in oligotrophic soil.

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