gs1medium

Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to

  1. 1.Resist drought and increase the absorptive area
  2. 2.Tolerate extremes of pH
  3. 3.Resist disease infestation Select the correct answer using the code given below:
  1. A.1 only
  2. B.2 and 3 only
  3. C.1 and 3 only
  4. D.1, 2 and 3
▶ Answer & Explanation

Correct answer: D. 1, 2 and 3

Mycorrhizal fungi form symbiotic relationships with plant roots, enhancing nutrient and water uptake. This symbiosis helps plants better withstand drought conditions by improving water absorption efficiency. The fungal hyphae extend far beyond the root system, effectively increasing the absorptive surface area. Furthermore, mycorrhizae can improve plant tolerance to various environmental stresses, including pH fluctuations and soil salinity, and can also enhance resistance to soil-borne pathogens and diseases.

Source: UPSC gs1 2013

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