Research ResourcePlant biology

Combinatorial interaction network of transcriptomic and phenotypic responses to nitrogen and hormones in the Arabidopsis thaliana root

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Science Signaling  25 Oct 2016:
Vol. 9, Issue 451, pp. rs13
DOI: 10.1126/scisignal.aaf2768

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A nitrogen-hormone interaction network in plants

Both intrinsic factors, such as hormones, and extrinsic factors, such as water and nutrient availability, shape plant development. Ristova et al. evaluated the short-term transcriptional responses and the long-term developmental responses of Arabidopsis thaliana roots to the nitrogen-containing nutrients nitrate and ammonium and the hormones auxin, cytokinin, and abscisic acid. The authors identified genes that were stimulated or inhibited in response to each single factor and to all possible combinations of these three hormones and two nitrogen sources. By combining these transcriptomic data with quantification of changes in root architecture after each treatment, the authors built a multivariate network model of the interaction between nitrogen and hormones that may predict changes in the architecture response of the Arabidopsis root. These data will be useful for future studies on the molecular mechanisms that mediate these interactions and may help identify combinations of nutrients and hormones that improve plant growth under specific environmental conditions.

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