Formation of new tissues, is a constituent of the cell wall and the integrity of the plasma membrane.
It participates in cell division, in the metabolism and transport of sugars, in the germination of the pollen grain and in the growth of the pollen tube.
Deficiency – Causes deformation of new leaves, forming a wrinkle. The top leaves are twisted, forming a “knot” between the leaves, which are tied together. The apical meristem can dry up and die.