Question

Which are two micronutrients that usually play a role in limiting plant growth? How do they function?

Answer 1

• Copper (Cu) activates enzymes and catalyzes reactions in several plant-growth processes. The presence of copper is closely linked to Vitamin A production, and it helps ensure successful protein synthesis.
  

• Boron (B) exists primarily in soil solutions like the $B{O}_3^{3-}$ ion – the form commonly taken up by plants. One of the most important micronutrients affecting membrane stability, B supports the structural and functional integrity of plant cell membranes. Boron deficiency symptoms first appear at the growing points, and certain soil types are more prone to boron deficiencies.