QUESTION

Hard

Science & Technology

Prelims 2013

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

  1. Resist drought and increase absorptive area
  2. Tolerate extremes of pH
  3. Resist disease infestation

Select the correct answer using the codes given below:

Select an option to attempt

Explanation

Statement 1 is correct: Mycorrhizae:

  • Greatly increase the effective root surface area
  • Improve water absorption
  • Help plants withstand drought stress

Statement 2 is correct: Mycorrhizal fungi help plants:

  • Grow in acidic or alkaline soils
  • Access nutrients even when pH reduces their availability

Statement 3 is correct: Mycorrhizae offer bioprotection:

  • Compete with soil pathogens
  • Produce antibiotics
  • Strengthen plant immune responses

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