Salt affects plant growth mainly through:
(a) toxicity from excessive uptake of salt substances such as sodium, (b) reduced water uptake, known as water stress and (c) reduction in uptake of essential nutrients particularly potassium.
Early signs of salinity damage are (a) darker leaves than the normal color of bluish-green, (b) smaller leaves and (c) stems with shorter spaces between leaf nodes. When the problem gets more serious, leaves (a) become yellow (chlorotic) and (b) are affected by "burning" (firing, browning) and the death of leaf edges. |