Which of the following is false about the Mycorrhiza?

Options

A. The fungal symbiont absorbs phosphorus from soil and passes it to plants.
B. Plant symbionts show resistance to root-borne pathogen, tolerance to salinity and drought and increase growth and development
C. Plant symbionts show the resistance to herbicides
D. None of the above is false

Answer

To determine which statement about Mycorrhiza is false, we will analyze each statement provided.

### Step-by-Step Solution:

1. **Understanding Mycorrhiza**: Mycorrhiza refers to the symbiotic association between fungi and plant roots. This relationship is beneficial for both parties.

2. **Analyzing the First Statement**:
- **Statement**: "The fungal symbionts absorb phosphorus from soil and pass it into plants."
- **Analysis**: This statement is true. Mycorrhizal fungi, particularly those from the genus Glomus, are known to absorb phosphorus from the soil and transfer it to the plants, enhancing nutrient uptake.

3. **Analyzing the Second Statement**:
- **Statement**: "The plant symbionts show resistance to root-borne pathogens."
- **Analysis**: This statement is also true. Mycorrhizal fungi can help plants resist root-borne pathogens by enhancing the plant's immune response and providing a physical barrier.

4. **Analyzing the Third Statement**:
- **Statement**: "The plant symbionts show resistance to herbicide."
- **Analysis**: This statement is questionable. While mycorrhizal associations can improve plant health, they do not inherently provide resistance to herbicides. Herbicides are chemicals designed to kill plants, and their effects can vary depending on the type of herbicide and the plant species.

5. **Conclusion**: After analyzing all three statements, the third statement about mycorrhizal fungi providing resistance to herbicides is the false statement.

### Final Answer:
The false statement about Mycorrhiza is: "The plant symbionts show resistance to herbicide."