Which micronutrient is essential for the synthesis of plant hormones?

Zinc is essential for the synthesis of plant hormones, particularly auxins, which are crucial for various growth processes in plants. Auxins play a significant role in cell elongation, apical dominance, and root development. Without adequate zinc, the production of these hormones can be impaired, leading to stunted growth and other developmental issues in plants.

While iron, manganese, and chlorine are also important micronutrients for plant health, they serve different roles. Iron is primarily involved in chlorophyll synthesis and electron transport in photosynthesis; manganese contributes to photosynthesis and enzyme activation; and chlorine is important for osmosis and ionic balance in plants. However, it is zinc that is directly linked to hormone synthesis, making it a critical component for healthy plant growth and development.