Toxicity of Elements and Soil Pollution · NCERT Biology

Excess manganese in soil most commonly leads to toxicity by:

  1. Directly inhibiting photosynthetic reactions
  2. Reducing uptake of iron and magnesium
  3. Stimulating nitrogen fixation in roots
  4. Promoting elongation of root cells
Show answer and explanation

Correct answer: Reducing uptake of iron and magnesium

High manganese concentrations reduce uptake of iron and magnesium through ionic antagonism. This causes nutritional imbalance and characteristic toxicity symptoms.

Difficulty: Medium Question 4 of 20

Practice all 20 Toxicity of Elements and Soil Pollution questions

Keep practicing

More Toxicity of Elements and Soil Pollution questions