Nitric oxide (NO), gibberellic acid (GA), and phosphorus (P) have been reported to regulate primary root (PR) growth, but interactions between them in the growth of Arabidopsis PR remain unknown.This work confirmed that low P availability significantly inhibited PR growth and that NO arrested PR 2014 dodge ram 1500 fender flares growth in either high P or low P conditions.Moreover, NO counteracted the stimulatory effects of GA on PR growth under low P conditions.Finally, the dependence of low P and NO inhibition of PR growth cubs foam finger on the DELLA-SLY pathway revealed that NO stabilized a major DELLA protein.We therefore conclude that antagonistic interactions between NO and GA regulate PR growth under both the high and low P conditions, and a DELLA-SLY module is the node where NO, GA, and P pathways converge and interact.