Root gravitropism requires lateral root cap and epidermal cells for transport and response to a mobile auxin signal

  title={Root gravitropism requires lateral root cap and epidermal cells for transport and response to a mobile auxin signal},
  author={R. Swarup and E. Kramer and P. Perry and K. Knox and H. Leyser and J. Haseloff and G. Beemster and R. Bhalerao and M. Bennett},
  journal={Nature Cell Biology},
  • R. Swarup, E. Kramer, +6 authors M. Bennett
  • Published 2005
  • Biology, Medicine
  • Nature Cell Biology
  • Re-orientation of Arabidopsis seedlings induces a rapid, asymmetric release of the growth regulator auxin from gravity-sensing columella cells at the root apex. The resulting lateral auxin gradient is hypothesized to drive differential cell expansion in elongation-zone tissues. We mapped those root tissues that function to transport or respond to auxin during a gravitropic response. Targeted expression of the auxin influx facilitator AUX1 demonstrated that root gravitropism requires auxin to be… CONTINUE READING
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