Boron (B) Uptake

Abstract

Boron deficiency generally occurs at a B concentration of < 20 μg g −1 in mature leaf tissues of most of the crops. Boron is essential for cell wall structure and functions. Borate cross-linking of RG-II is correlated with the ability of vascular plants to maintain upright growth. Boric acid is charge neutral and is the major chemical form in which boron is taken up by plants. NIP5;1 and BOR1 are the genes involved in B uptake under conditions of B deficiency. Japonica rice cultivars are more tolerant to higher levels of B than indica rice cultivars.