Signal integration is central to the regulation of patterning during plant development. During lateral root initiation, a signalling pathway controlled by the phloem-secreted TDIF peptide is found to activate the auxin signalling pathway independently of auxin, through phosphorylation of ARF transcription factors by GSK3 (Shaggy-like) kinases.
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Galvan-Ampudia, C., Vernoux, T. Signal integration by GSK3 kinases in the root. Nat Cell Biol 16, 21–23 (2014). https://doi.org/10.1038/ncb2898
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DOI: https://doi.org/10.1038/ncb2898