MDR-like ABC transporter AtPGP4 is involved in auxin-mediated lateral root and root hair development

Santelia, Diana; Vincenzetti, Vincent; Azzarello, Elisa; Bovet, Lucien; Fukao, Yoichiro; Düchtig, Petra; Mancuso, Stefano; Martinoia, Enrico; Geisler, Markus (2005). MDR-like ABC transporter AtPGP4 is involved in auxin-mediated lateral root and root hair development. FEBS letters, 579(24), pp. 5399-5406. Elsevier 10.1016/j.febslet.2005.08.061

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Previous data have suggested an involvement of MDR/PGP-like ABC transporters in transport of the plant hormone auxin and, recently, AtPGP1 has been demonstrated to catalyze the primary active export of auxin. Here we show that related isoform AtPGP4 is expressed predominantly during early root development. AtPGP4 loss-of-function plants reveal enhanced lateral root initiation and root hair lengths both known to be under the control of auxin. Further, atpgp4 plants show altered sensitivities toward auxin and the auxin transport inhibitor, NPA. Finally, mutant roots reveal elevated free auxin levels and reduced auxin transport capacities. These results together with yeast growth assays suggest a direct involvement of AtPGP4 in auxin transport processes controlling lateral root and root hair development.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant nutrition (discontinued)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Bovet, Lucien and Martinoia, Enrico

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0014-5793

Publisher:

Elsevier

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

30 Jan 2018 09:08

Last Modified:

30 Jan 2018 09:08

Publisher DOI:

10.1016/j.febslet.2005.08.061

PubMed ID:

16198350

Uncontrolled Keywords:

Auxin transport; ABC transporter; MDR; p-Glycoprotein; Lateral root; Root hairs

BORIS DOI:

10.7892/boris.102080

URI:

https://boris.unibe.ch/id/eprint/102080

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