Plant Science: Arabidopsis H+-PPase AVP1 regulates auxin-mediated organ development

Jisheng Li, Haibing Yang, Wendy Ann Peer, Gregory Richter, Joshua Blakeslee, Anindita Bandyopadhyay, Boosaree Titapiwantakun, Soledad Undurraga, Mariya Khodakovskaya, Elizabeth L. Richards, Beth Krizek, Angus S. Murphy, Simon Gilroy, Roberto Gaxiola

Research output: Contribution to journalArticlepeer-review

359 Scopus citations


The transport of auxin controls developmental events in plants. Here, we report that in addition to maintaining vacuolar pH, the H+- pyrophosphatase, AVP1, controls auxin transport and consequently auxin-dependent development. AVP1 overexpression results in increased cell division at the onset of organ formation, hyperplasia, and increased auxin transport. In contrast, avp1-1 null mutants have severely disrupted root and shoot development and reduced auxin transport. Changes in the expression of AVP1 affect the distribution and abundance of the P-adenosine triphosphatase and Pinformed 1 auxin efflux facilitator, two proteins implicated in auxin distribution. Thus, AVP1 facilitates the auxin fluxes that regulate organogenesis.

Original languageEnglish (US)
Pages (from-to)121-125
Number of pages5
Issue number5745
StatePublished - Oct 7 2005
Externally publishedYes

ASJC Scopus subject areas

  • General


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