The Question is from neet-botany mineral-nutrition ion-uptake, and it was created by the author Mr. NARESH KUMAR K

Question

Mycorrhizae enhance nutrient uptake in plants primarily by increasing:

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Mycorrhizal fungi and plant nutrient uptake
 **Related Topics**: Plant nutrition, fungal ecology, symbiotic relationships
 **Prerequisites**: Basic understanding of plant anatomy and physiology.
## SOLUTION PATHWAY
**Given Information**:
  The question asks how mycorrhizae improve nutrient uptake in plants.
  Options describe different plant processes.
**Method & Steps**:
 1. Understand Mycorrhizae: Mycorrhizae are symbiotic relationships between plant roots and fungi. The fungi colonize the roots and extend their hyphae (thread-like structures) into the surrounding soil.
  Reasoning:  These hyphae greatly increase the surface area available for nutrient absorption.
  Formula/Rule: No specific formula is needed.
 2. Analyze Options: Each option represents a different aspect of plant function.
  Working:  Let's evaluate each option:
        a) Rate of transpiration: Mycorrhizae might indirectly influence transpiration but it's not their primary effect on nutrient uptake.
        b) Root hair length: Mycorrhizae can influence root hair development, but the hyphae themselves provide a much larger increase in absorptive surface area.
        c) Surface area for absorption: This is the primary mechanism by which mycorrhizae enhance nutrient uptake. The extensive fungal hyphae act as an extension of the root system, vastly increasing the contact area with the soil and the availability of nutrients.
        d) Photosynthetic rate: Mycorrhizae indirectly affect photosynthesis by improving nutrient availability, but this is a secondary effect, not the primary mechanism of enhanced nutrient uptake.
 3. Conclusion:
  Result: The most significant way mycorrhizae enhance nutrient uptake is by increasing the surface area for absorption.
  Verification: The extensive network of fungal hyphae provides overwhelming evidence for this mechanism.
 ## OPTION ANALYSIS
A :x: Rate of transpiration is not the primary mechanism of enhanced nutrient uptake by mycorrhizae.
B :x: While root hair length might be slightly affected, the massive increase in surface area due to the fungal hyphae is far more significant.
C ✓: The fungal hyphae dramatically increase the surface area available for nutrient absorption, making this the correct answer.
D :x: Increased nutrient uptake can lead to improved photosynthesis, but this is a consequence, not the primary mechanism.
 ## LEARNING AIDS
 **Common Mistakes**:
  1. Confusing the effect of mycorrhizae on nutrient uptake with other plant processes (e.g., transpiration, photosynthesis).
   [How to avoid]: Focus on the direct mechanism of nutrient absorption and the role of the fungal hyphae.
  2. Overemphasizing other factors that might have a minor influence on nutrient uptake.
   [How to avoid]:  Concentrate on the most significant factor, which is the increased surface area for absorption.
 **Quick Tips**:
  1. Remember the image of the extensive network of fungal hyphae extending far beyond the root system's reach.
  2. Mycorrhizae = More surface area = More nutrient uptake

Mr. NARESH KUMAR K · Answer

Rate of transpiration

Mr. NARESH KUMAR K · Answer

Root hair length

Mr. NARESH KUMAR K · Answer

The correct Option is "Surface area for absorption"

Mr. NARESH KUMAR K · Answer

Photosynthetic rate

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