Question

Which one of the following symptoms is not due to manganese toxicity in plants?

• A. Calcium translocation in shoot apex is inhibited
• B. Deficiency in both Iron and Nitrogen is induced
• C. Appearance of brown spot surrounded by chlorotic veins
• D. None of the above

Answer 1

The correct option is D

None of the above

Manganese competes with iron and magnesium for uptake. With more magnesium available for binding with enzymes, it may induce a deficiency of iron and magnesium.
The iron deficiency causes the appearance of brown spots on the leaves surrounded by chlorotic veins.
Manganese toxicity also inhibits calcium translocation in the shoot apex, which causes calcium deficiency in plants.