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. 2016 Mar 22;16:70. doi: 10.1186/s12870-016-0758-8

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© Zheng et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Principal component analysis (PCA) of the lipid composition upon different low-temperature treatments of Arabidopsis and rice. a PCA analysis of lipid content (nmol per mg). b PCA analysis of lipid relative content (mol%). Green and red symbols represent Arabidopsis and rice, respectively. The different treatments are represented by different shapes. −6, −12, 10 and 4 represent temperatures of treatment in °C. −6 °C and 10 °C are non-lethal low temperatures for Arabidopsis and rice, while −12 °C and 4 °C are lethal low temperatures for Arabidopsis and rice, respectively. T represents samples immediately after low-temperature treatment, R1 and R3 represent samples after 1 and 3 days of recovery growth