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. 2019 Jun 12;10:758. doi: 10.3389/fpls.2019.00758

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Copyright © 2019 Casadesús, Polo and Munné-Bosch.

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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Principal Component Analysis of all variables measured in the study. Numbers represent each observation used to perform the analysis (n = 157) and symbols with colors represent each treatment (WS, water stressed; WW, well-watered; –P, without Pepton application; +P, with Pepton application, as shown in the legend). Symbols without number are the coordinates for a given group, calculated as the mean coordinates of the individuals in the group. Arrows represent each variable measured in the study. Dim1, principal component 1; Dim2, principal component 2. Percentages indicate to what extent the component explains observed variability. ATOC, α-tocopherol; ATOC_CHL, α-tocopherol/chlorophyll; CHLA_B, chlorophyll a/chlorophyll b ratio; CHLTOTAL, chlorophyll a + chlorophyll b; GTOC, γ-tocopherol; GTOC_CHL, γ-tocopherol/chlorophyll; PC8, plastochromanol-8; PC8_CHL, plastocromanol-8/chlorophyll.