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Micronutrient Functions in Plants

  • 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.


Washington State University