A plant exhibits the appearance of brown spots surrounded by chlorotic veins. When inspected in more detail, it is observed that its calcium translocation to the shoot is also disrupted. The plant is showing toxicity of
Manganese toxicity causes the inhibition of absorption of Fe and Mg. Mn competes with Mg for absorption. Mn also inhibits the translocation of Ca. Mn toxicity symptoms are like deficiency symptoms of Calcium, Magnesium and Iron.