Article
The Arabidopsis concentration-dependent influx/efflux transporter ABCB4 regulates cellular auxin levels in the root epidermis.
The Plant journal : for cell and molecular biology - 1 Feb 2012
Kubeš Martin, Yang Haibing, Richter Gregory L, Cheng Yan, Młodzińska Ewa, Wang Xia, Blakeslee Joshua J, Carraro Nicola, Petrášek Jan, Zažímalová Eva, Hoyerová Klára, Peer Wendy Ann, Murphy Angus S
Abstract excerpt
Arabidopsis ATP-binding cassette B4 (ABCB4) is a root-localised auxin efflux transporter with reported auxin uptake activity in low auxin concentrations. Results reported here demonstrate that ABCB4 is a substrate-activated regulator of cellular auxin levels. The contribution of ABCB4 to shootward auxin movement at the root apex increases with auxin concentration, but in root hair elongation assays ABCB4-mediated...
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