It participates in enzymatic activation, with an average of 50 enzymes that demand K for their normal activity.
Another fundamental function is osmoregulation, being responsible for the control of stomatal opening and closing.
Deficiency – It starts in the old leaves, which turn orange, and can become completely brown. This chlorosis progresses to necrosis, leaving the leaves with a burnt appearance. There is also thinning of the culms and the main vein shows reddish stains.