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

Answer: DSolution: Manganese is an essential micronutrient which is mainly required by the leaves and seeds of plants. Manganese becomes toxic when absorded by plants in higher amounts. Its toxicity cause reduced uptake of $F{e}^2,M{g}^{2+}$and N, inhibition of $C{a}^{2+}$ translocation in shoot apex, brown spots surrounded by chlorotic venic etc.