Both boron deficiency and rapid alkalization factor(RALF)have remarkable inhibitory effects on root elongation,however whether they are similar in the mechanisms of elongation regulation,or there are interactions between boron deficiency and RALF are unclear.The effects and mechanisms of boron deficiency and RALF in restraining root elongation were stduied in Arabidopsis thaliana(wild type Col-0).The main results from apoplastic pH,rhizophere p H,surface pH,intracellular pH and H2O2 production in different ...