It regulates turgor pressure, which helps protect plant cells from disease invasion. In certain plants, potassium can be replaced by sodium. Sulfur Sulfur is a part of certain amino acids and all proteins. It is a part of the flavor compounds in mustard and onion family plants. Calcium Calcium is a part of cell walls and regulates cell wall construction.
Cell walls give plant cells their structural strength.
Enhances uptake of negatively charged ions such as nitrate, sulfate, borate and molybdate. It balances charge from organic an ions produced through metabolism by the plant. Some enzymes are regulated by Ca-calmodulin. Magnesium Magnesium is the central element within the chlorophyll molecule. It is an important cofactor the production of ATP, the compound which is the energy transfer tool for the plant.