Boron: an immobile nutrient in plant system

 

• Boron is immobile in the plant system as it has been found that a part of a leaf exhibits B deficiency even if the other part of the same leaf contains.

• The possible reason for the immobility of boron in a plant is high cyclic local mobility (Fig). The boron tends to maintain equilibrium in concentration in all tissues over a small region. Such tendency leads to a highly localized cyclic movement of boron in the plant.

• Therefore, it is the extremely high local mobility of boron that makes it immobile in the plant system.