Krizek Beth
Yang Haibing
Murphy Angus S
Gilroy Simon
Li Jisheng
121-5
Peer Wendy Ann
Khodakovskaya Mariya
16210544
Richter Gregory
Titapiwantakun Boosaree
Arabidopsis H+-PPase AVP1 regulates auxin-mediated organ development.
5745
2005 Oct
Li Jisheng et al. 2005 Oct. Science 310(5745):121-5.
Bandyopadhyay Anindita
310
Gaxiola Roberto
Undurraga Soledad
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.
Richards Elizabeth L
Blakeslee Joshua