Mycorrhizal Biotechnology Uses — UPSC Prelims PYQ 2013
Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to
- resist drought and increase absorptive area
- tolerate extremes of PH
- Resist disease infestation
Select the correct answer using the codes given below:
- 1 only
- 2 and 3 only
- 1 and 3 only
- 1, 2 and 3
Explanation
All statements are correct
- Mycorrhizal biotechnology is used in rehabilitating degraded sites due to the beneficial interactions between mycorrhizal fungi and plant roots. The fungi form symbiotic relationships with plants and enhance their ability to survive in difficult conditions. Here’s why all three statements are correct:
- Resist drought and increase absorptive area: Mycorrhizal fungi increase the surface area of plant roots, which helps in better absorption of water and nutrients, aiding drought resistance.
- Tolerate extremes of pH: Mycorrhizal fungi help plants tolerate extreme soil pH by modifying the rhizosphere environment, allowing plants to grow in acidic or alkaline soils.
- Resist disease infestation: The fungi provide a protective barrier against soil-borne pathogens, thus helping plants resist disease infestations.
Answer: (d) 1, 2 and 3; Difficulty Level: Medium
