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Out of the shade and into the light


Plants reach for the sun by avoiding the shade and by directly growing towards the light. Two studies now suggest that the polar relocation of PIN3, a transporter directing the flow of the plant hormone auxin, drives both growth processes. PIN3 repolarization occurs downstream of shade perception through phytochrome photoreceptors, whereas blue light perceived by phototropin initiates polar recycling of PIN3 and growth towards the light.

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Figure 1: PIN3 polarization during shade avoidance and phototropic responses of Arabidopsis seedlings.


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Correspondence to Markus Grebe.

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Grebe, M. Out of the shade and into the light. Nat Cell Biol 13, 347–349 (2011).

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