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Principal component analysis (PCA) of the different cold treatments.

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posted on 13.08.2015 by Yuan Song, Lijun Liu, Yanhao Feng, Yunzhu Wei, Xiule Yue, Wenliang He, Hua Zhang, Lizhe An

Principal component analysis (PCA) of the comparisons of DNA methylation changes among the 23°C, chilling (4°C) and freezing (-4°C) treatments at each treatment time. (A) 0.5 h, (B) 3 h, (C) 12 h, (D) 24 h. The trends in DNA methylation changes at 23°C, 4°C and -4°C are represented by red circles, cyan circles and purple circles, respectively. Numbers 1–5 represent five individual plants at 23°C, 6–10 represent five individual plants at 4°C, and 11–15 represent five individual plants at -4°C. The percentage of the variance that is explained by each principal component is given in the iconograph near the axes. The first two components together explain greater than 50% of the variations in all of the PCA modes.

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