State three effects of manganese if absorbed in excess by plants.
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Manganese toxicity occurs when Mn is absorbed in excessive amounts, causing:
- Reduction in uptake of Mg and Fe: Competitive inhibition at uptake sites.
- Prevention of Mg binding with enzymes: Interferes with enzyme activation processes.
- Inhibition of Ca translocation to shoot apex: Disrupts calcium movement, affecting meristematic growth.
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