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. 2016 Nov 10;7:1686. doi: 10.3389/fpls.2016.01686

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Copyright © 2016 Iurlaro, De Caroli, Sabella, De Pascali, Rampino, De Bellis, Perrotta, Dalessandro, Piro, Fry and Lenucci.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Extractable XET activity in excised segments of (a) root apical region, (b) root sub-apical region, and (c) shoot from 3-day-old durum wheat (T. durum Desf.) seedlings of (i) Simeto, (ii) Creso, and (iii) Ardente cultivars, differing in dehydration tolerance. The seedlings of each cultivar were subjected to drought stress for 2, 4, and 24 h. XET activity is expressed as nmol of xyloglucan–XXXGol-SR formed by the transglycosylation reaction, per mg of total protein. The results represent the average of n independent replications ± standard error. Different capital letters above bars indicate statistically significant differences (p < 0.05) between time points within the same cultivar, while lower case letters indicate statistically significant differences across cultivars in response to stress duration, as determined by the Tukey’s post hoc test.