Which micronutrient listed is important for maintaining plant metabolic processes?

Molybdenum is essential for plant metabolic processes, particularly due to its role as a cofactor for key enzymes involved in nitrogen metabolism. It is crucial for the fixation of atmospheric nitrogen, supporting the development of amino acids, proteins, and other vital compounds within the plant. Molybdenum also aids in the reduction of nitrates to amines, which is an important part of the nitrogen cycle in plants. Because of these critical functions, a deficiency in molybdenum can lead to stunted growth and poor overall health in plants, highlighting its importance in maintaining metabolic processes.

In contrast, while nickel, boron, and chlorine also play roles in plant health, they are involved in different functions. Nickel, for instance, is important for the activation of enzymes that are involved in nitrogen metabolism but does not have the broad metabolic impact of molybdenum. Boron is essential for cell wall formation and reproductive growth rather than directly influencing key metabolic pathways. Chlorine is mainly involved in osmosis and ionic balance within cells. Each micronutrient has its specific roles, but molybdenum stands out for its direct involvement in fundamental metabolic processes such as nitrogen metabolism.