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Interactions between nitric oxide, gibberellic acid, and phosphorus regulate primary root growth in Arabidopsis

TitleInteractions between nitric oxide, gibberellic acid, and phosphorus regulate primary root growth in Arabidopsis
Publication TypeJournal Article
Year of Publication2014
AuthorsWu AP, Gong L, Chen X, Wang JX
JournalBiologia Plantarum
Volume58
Issue2
Pagination335-340
Date PublishedJun
ISBN Number0006-3134
Accession NumberWOS:000335328100016
Abstract

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 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 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.

Short TitleInteractions between nitric oxide, gibberellic acid, and phosphorus regulate primary root growth in Arabidopsis