Aminotransferases provide the signals for root growth

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Uncovering the role of new aminotransferases in the regulation of the signals behind root growth, Le Deunff et al. show that L-aminoethoxyvinylglycine (AVG) acts as an ethylene and auxin biosynthesis inhibitor. AVG is also shown to inhibit other aminotransferases implied in nitrogen metabolism.

Location of the different root zones where nitrate is taken up by nitrate transporters of NRT family in Arabidopsis.
Location of the different root zones where nitrate is taken up by nitrate transporters of NRT family in Arabidopsis. Full details in Le Deunff et al. (2016).

Given the central role played by aminotransferases in nutrient and carbon shuttling and hormone biosynthesis, this review concludes that an identification of aminotransferases’ targets and an understanding of the interactions between ethylene levels and nitrogen metabolism can contribute to the development of a root morphogenetic programme. This aims for improved efficiency of nitrate absorption rates.

Root Biology Issue This paper is part of the Root Biology Special Issue.

Reference

Erwan Le Deunff, Julien Lecourt, Philippe Malagoli, 2016, 'Fine-tuning of root elongation by ethylene: a tool to study dynamic structure–function relationships between root architecture and nitrate absorption', Annals of Botany, vol. 118, no. 4, pp. 607-620 http://dx.doi.org/10.1093/aob/mcw123


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