Explain Chlorosis and Necrosis.
- Chlorosis: Due to the degradation of chlorophyll, the leaves become decolourized and become pale yellow coloured. This effect is called chlorosis. Deficiency of Mg, N, Fe, and Mn etc. result in chlorosis.
- Necrosis: Death or degradation of cells of plant tissue is called necrosis. Due to this effect, the leaves show spots, rotting, or blight symptoms. Deficiency of Ca, Mg, Cu, and K etc. causes necrosis of cells.