The far side of auxin signaling: Fundamental cellular activities and their contribution to a defined growth response in plants

Katarzyna Retzer, Haroon Butt, Barbara Korbei, Christian Luschnig*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

10 Scopus citations


Recent years have provided us with spectacular insights into the biology of the plant hormone auxin, leaving the impression of a highly versatile molecule involved in virtually every aspect of plant development. A combination of genetics, biochemistry, and cell biology has established auxin signaling pathways, leading to the identification of two distinct modes of auxin perception and downstream regulatory cascades. Major targets of these signaling modules are components of the polar auxin transport machinery, mediating directional distribution of the phytohormone throughout the plant body, and decisively affecting plant development. Alterations in auxin transport, metabolism, or signaling that occur as a result of intrinsic as well as environmental stimuli, control adjustments in morphogenetic programs, giving rise to defined growth responses attributed to the activity of the phytohormone. Some of the results obtained from the analysis of auxin, however, do not fit coherently into a picture of highly specific signaling events, but rather suggest mutual interactions between auxin and fundamental cellular pathways, like the control of intracellular protein sorting or translation. Crosstalk between auxin and these basic determinants of cellular activity and how they might shape auxin effects in the control of morphogenesis are the subject of this review.

Original languageEnglish (US)
Pages (from-to)731-746
Number of pages16
Issue number4
StatePublished - Jul 2014

Bibliographical note

Funding Information:
The authors are indebted to Jürgen Kleine-Vehn (BOKU, Vienna) for valuable comments on the manuscript. Work in the lab of C.L. is supported by the Austrian Science Fund FWF (P25931), K.R. is supported by a Doc fforte fellowship from the Austrian Academy of Sciences, B.K. holds a Hertha Firnberg fellowship from the FWF (T477), and H.B. was supported by a fellowship from the Pakistani Commission for Higher Education (HEC).


  • Auxin
  • Cytoskeleton
  • Plasma membrane
  • Protein sorting
  • Translational control

ASJC Scopus subject areas

  • Plant Science
  • Cell Biology


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