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 B Deficiency in both iron and nitrogen is induced.

Manganese toxicity also frequently causes chlorosis (pale or yellow colour), most severe on the younger leaves, due to an induced iron deficiency. Either one or both of these symptoms may be observed in crops affected by manganese toxicity. So, the correct answer is "Deficiency in both iron and nitrogen is induced."