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

@article{Ding2011LightmediatedPO,
  title={Light-mediated polarization of the PIN3 auxin transporter for the phototropic response in Arabidopsis},
  author={Zhaojun Ding and Carlos S Galvan-Ampudia and Emilie Demarsy and Łukasz Łangowski and J{\"u}rgen Kleine-Vehn and Yuanwei Fan and Miyo Terao Morita and Masao Tasaka and Christian Fankhauser and Remko Offringa and Jiř{\'i} Friml},
  journal={Nature Cell Biology},
  year={2011},
  volume={13},
  pages={447-452}
}
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… Expand
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TLDR
It is reported that the auxin efflux carrier PIN-FORMED (PIN) 3 is involved in asymmetric auxin distribution and root negative phototropism. Expand
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TLDR
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TLDR
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TLDR
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TLDR
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Termination of Shoot Gravitropic Responses by Auxin Feedback on PIN3 Polarity
TLDR
Two mechanistically distinct PIN3 polarization events redirect auxin fluxes at different time points of the gravity response: first, gravity-mediated redirection of PIN3-mediated auxin flow toward the lower hypocotyl side, where auxin gradually accumulates and promotes growth, and laterPIN3 polarization to the opposite cell side, depleting this auxin maximum to end the bending. Expand
Plasma membrane H+-ATPase regulation is required for auxin gradient formation preceding phototropic growth
TLDR
It is shown that during phototropism, H+‐ATPase activity is regulated by the phototropin photoreceptors, providing a mechanism by which light influences apoplastic pH. Expand
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