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. 2019 Nov 29;10:1556. doi: 10.3389/fpls.2019.01556

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Copyright © 2019 Ruocco, De Luca, Marín-Guirao and Procaccini

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) and the copyright owner(s) 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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Schematic (qualitative) representation of main leaf-age related responses of P. oceanica to acute heat stress. Combined responses of both leaf-age gradients (vertical and horizontal) are depicted. Total methylation (5-mC) is in bold; photo-physiological parameters (NPQ, Fv/Fm, F₀, Fm, [Chl]) are in regular letters; genes (psbD, psbA, PSBS, FD, RBCS, CAB-151, POR, AOX, BI, and HSP90) are in italics. The length of the arrows reflects the intensity of gene up or down-regulation.