Whole plant nutrient signalling involves bidirectional exchange of signal molecules between roots and shoots. For nitrogen uptake, in addition to the root-to-shoot delivery of nitrogen-deprivation information, a shoot-to-root path is now defined.
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The authors declare no competing financial interests.
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Ruffel, S., Gojon, A. Systemic nutrient signalling: On the road for nitrate. Nature Plants 3, 17040 (2017). https://doi.org/10.1038/nplants.2017.40