Manganese

The main function of manganese is the activation of enzymes responsible for important metabolic processes.

On the one hand, it intervenes in photosynthesis by activating the manganese-protein complex that transports electrons from water to photosystem II, in the process of water photolysis.

It is also involved in microcellular respiration by activating many respiratory enzymes. Krebs cycle.

It intervenes in nitrogen metabolism, being involved in the activation of arginase, a key enzyme in the urea cycle.

ABSORPTION

It is absorbed in the form of Mn+2 ions by the roots and leaves, through an energy-intensive process. This process can be slowed by the presence of other divalent ions such as Mn+2 and Ca+2.

DEFICIENCIES

Manganese deficiency is a limiting factor in acidic soils with high organic content. Although this deficiency is not very common, the initial symptoms are interveinal chlorosis, in both young and old leaves, associated with chlorotic spots that later become necrotic. It causes disorganization of the membranes of the cell nucleus and mitochondria.

Mn-deficient plants wilt and appear stunted.