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. 2012 Oct 17;63(18):6335–6345. doi: 10.1093/jxb/ers285

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© 2012 The Authors.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 4. — Relative expression of abscisic acid metabolism-, signalling-, and drought tolerance-related genes (A, NCED1; B, NCED2; C, AAO31; D, AAO32; E, CYP707A1; F, CYP707A2; G, PLDα; H, ZPT2-3) in response to various substrate water contents (θ = 0.40, 0.30, 0.20, and 0.10 m³·m^–3) during a 16 d period in Petunia × hybrid leaves. The drought treatments reached their threshold θ of 0.30, 0.20, and 0.10 m³·m^–3 after 2.5, 3.7, and 8.8 d, respectively. Error bars indicate standard error (n = 4). Expression data were normalized using EF1α and CYP.