Regulation of polar auxin transport by AtPIN1 in Arabidopsis vascular tissue.

Gälweiler, L; Guan, C; Müller, A; Wisman, E; Mendgen, K; Yephremov, A; Palme, K · Science · 1998

basic_science · Level V

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Abstract

Polar auxin transport controls multiple developmental processes in plants, including the formation of vascular tissue. Mutations affecting the PIN-FORMED (PIN1) gene diminish polar auxin transport in Arabidopsis thaliana inflorescence axes. The AtPIN1gene was found to encode a 67-kilodalton protein with similarity to bacterial and eukaryotic carrier proteins, and the AtPIN1 protein was detected at the basal end of auxin transport-competent cells in vascular tissue. AtPIN1 may act as a transmembrane component of the auxin efflux carrier.

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