YUCCA auxin biosynthetic genes are required for Arabidopsis shade avoidance

Plants respond to neighbor shade by increasing stem and petiole elongation. Shade, sensed by phytochrome photoreceptors, causes stabilization of proteins and subsequent induction of auxin biosynthetic genes. To investigate the role of genes in phytochrome-mediated elongation, we examined auxin signa...

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Veröffentlicht in:PeerJ (San Francisco, CA) CA), 2016-10, Vol.4, p.e2574-e2574, Article e2574
Hauptverfasser: Müller-Moulé, Patricia, Nozue, Kazunari, Pytlak, Melissa L, Palmer, Christine M, Covington, Michael F, Wallace, Andreah D, Harmer, Stacey L, Maloof, Julin N
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Sprache:eng
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Zusammenfassung:Plants respond to neighbor shade by increasing stem and petiole elongation. Shade, sensed by phytochrome photoreceptors, causes stabilization of proteins and subsequent induction of auxin biosynthetic genes. To investigate the role of genes in phytochrome-mediated elongation, we examined auxin signaling kinetics after an end-of-day far-red (EOD-FR) light treatment, and found that an auxin responsive reporter is rapidly induced within 2 hours of far-red exposure. and are all induced with similar kinetics suggesting that they could act redundantly to control shade-mediated elongation. To test this hypothesis we constructed a quadruple mutant and found that the hypocotyl and petiole EOD-FR and shade avoidance responses are completely disrupted. This work shows that auxin biosynthetic genes are essential for detectable shade avoidance and that genes are important for petiole shade avoidance.
ISSN:2167-8359
2167-8359
DOI:10.7717/peerj.2574