Uniform chlorosis appearing first on young leaves. Dying of growing tips, both roots and shoots. Plants appear dwarfed. Mg Mobile Component of chlorophyll. Enzyme activator - activates 36 known enzymes, more than any other element Interveinal chlorosis, normally appearing first on lower leaves.
Chlorotic areas die.
S Mobile Component of all proteins, a constituent of several amino acids. Several vitamins contain sulfur. Important in enzyme reactions - sulfur linkage is point of attachment of enzyme to substrate. Important in photosynthesis and N fixation. Uniform chlorosis over whole plant.