Fig. 3.

DNA methylation profiles and levels of class I and class II TEs in leaf and root tissues of switchgrass. a, b Average methylation level distribution over class I TEs (Retrotransposons; Copia, Gypsy, LTR-Other, LINE, and SINE). c, d Average methylation level distribution over class II TEs (DNA transposons; DNA transposons including DNA-Other, hAT, MULE-MuDR, EnSpm, and Stowaway). “−”, B” and “+” mean upstream (2-kb), body and downstream (2-kb) regions of TEs, respectively. AL and AR indicate leaf and root tissues, respectively, in switchgrass. e–g comparison of DNA methylation levels in Class I and Class II TEs between leaf and root tissues of switchgrass in the body and 2 kb-flanking regions. * means the p < 0.05, and ** means the p < 0.01. The red asterisk means hyper-methylation in the leaf tissue, and the green asterisk means hyper-methylation in the root tissue