Light-mediated polarization of the PIN3 auxin transporter for the phototropic response in Arabidopsis

Z. Ding, C. Galván Ampudia, E. Demarsy, Ł. Łangowski, J. Kleine Vehn, Y. Fan, M. Morita, M. Tasaka, C. Fankhauser, R. Offringa, J. Friml, Nature Cell Biology 13 (2011) 447–453.

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Abstract
Phototropism is an adaptation response, through which plants grow towards the light. It involves light perception and asymmetric distribution of the plant hormone auxin. Here we identify a crucial part of the mechanism for phototropism, revealing how light perception initiates auxin redistribution that leads to directional growth. We show that light polarizes the cellular localization of the auxin efflux carrier PIN3 in hypocotyl endodermis cells, resulting in changes in auxin distribution and differential growth. In the dark, high expression and activity of the PINOID (PID) kinase correlates with apolar targeting of PIN3 to all cell sides. Following illumination, light represses PINOID transcription and PIN3 is polarized specifically to the inner cell sides by GNOM ARF GTPase GEF (guanine nucleotide exchange factor)-dependent trafficking. Thus, differential trafficking at the shaded and illuminated hypocotyl side aligns PIN3 polarity with the light direction, and presumably redirects auxin flow towards the shaded side, where auxin promotes growth, causing hypocotyls to bend towards the light. Our results imply that PID phosphorylation-dependent recruitment of PIN proteins into distinct trafficking pathways is a mechanism to polarize auxin fluxes in response to different environmental and endogenous cues.
Publishing Year
Date Published
2011-04-01
Journal Title
Nature Cell Biology
Volume
13
Issue
4
Page
447 - 453
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Ding Z, Galván Ampudia C, Demarsy E, et al. Light-mediated polarization of the PIN3 auxin transporter for the phototropic response in Arabidopsis. Nature Cell Biology. 2011;13(4):447-453. doi:10.1038/ncb2208
Ding, Z., Galván Ampudia, C., Demarsy, E., Łangowski, Ł., Kleine Vehn, J., Fan, Y., … Friml, J. (2011). Light-mediated polarization of the PIN3 auxin transporter for the phototropic response in Arabidopsis. Nature Cell Biology, 13(4), 447–453. https://doi.org/10.1038/ncb2208
Ding, Zhaojun, Carlos Galván Ampudia, Emilie Demarsy, Łukasz Łangowski, Jürgen Kleine Vehn, Yuanwei Fan, Miyo Morita, et al. “Light-Mediated Polarization of the PIN3 Auxin Transporter for the Phototropic Response in Arabidopsis.” Nature Cell Biology 13, no. 4 (2011): 447–53. https://doi.org/10.1038/ncb2208.
Z. Ding et al., “Light-mediated polarization of the PIN3 auxin transporter for the phototropic response in Arabidopsis,” Nature Cell Biology, vol. 13, no. 4, pp. 447–453, 2011.
Ding Z, Galván Ampudia C, Demarsy E, Łangowski Ł, Kleine Vehn J, Fan Y, Morita M, Tasaka M, Fankhauser C, Offringa R, Friml J. 2011. Light-mediated polarization of the PIN3 auxin transporter for the phototropic response in Arabidopsis. Nature Cell Biology. 13(4), 447–453.
Ding, Zhaojun, et al. “Light-Mediated Polarization of the PIN3 Auxin Transporter for the Phototropic Response in Arabidopsis.” Nature Cell Biology, vol. 13, no. 4, Nature Publishing Group, 2011, pp. 447–53, doi:10.1038/ncb2208.

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