The importance of boron (B): it acts in cell division and elongation.
It acts on the germination of pollen grains and on the growth of the pollen tube. It acts in the transport of sugars, starch, nitrogen and phosphorus. Participates in the formation of grains. Important for seed germination.
Boron deficiency symptoms (B) appear initially causing an abnormal and slow development of apical growth points. The leaflets of young leaves are deformed, wrinkled, often thicker, and dark blue-green in color. The leaves and stems become fragile, indicating disturbance in transpiration, and the top leaves turn yellow or reddish.