• Most micronutrients are part of the enzyme systems of plants.
• Micronutrients play important roles in redox reactions
• Micronutrients play important roles in photosynthesis.
• Micronutrients are important in reactions such as N fixation, Protein synthesis.
• It is Complex to identify all roles. The identified roles:
• Cl is primarily involved in osmotic and cation neutralization.
• Cu, Fe, and Mo are active in the oxidation-reduction reactions in plants, which are essential for photosynthesis, and other metabolic processes.
• Fe involved in chlorophyll synthesis and can be deficient in turfgrass, especially if soil is alkaline. Any condition that restricts root growth can also cause iron deficiency, for example, compaction.
• Zn and Mn are essential for certain N transformations in plants.
• Ni is essential for the function of the urease enzyme.
• Mo is essential for symbiotic fixation of N.
• B is involved in cell division, and seed formation.
• Co is essential for the growth of symbiotic microorganisms, such as rhizobia, free-living N-fixing bacteria.