Fig. 1

A picture shows the sampling position for circRNA sequencing MPS and TPS represent the barks sample collected from the middle and top stems, respectively. This picture displays that the secondary cellular walls (SCWs) of fiber cells from the top of the ramie stems do not initiate growth and those from middle part of the ramie stems are thickening. This figure is cited from the study of Chen et al.[10] "

Table 1

Primer sequence of differentially expressed circRNAs and the control gene for qRT-PCR in ramie"

Table 2

Data statistics from circRNA sequencing for six samples of stem barks in ramie"

Fig. 2

GO functional classification of 4729 transcribed circRNAs genes in ramie"

Fig. 3

Identification of differentially expressed circRNA by comparing gene expression level between TPS and MPS libraries Red dots represent transcripts more prevalent in the MPS library, blue dots show those present at a lower frequency in the MPS, and gray dots indicate transcripts that did not change significantly; X and Y axes represent the logarithm of read number for each circRNA in TPS and MPS libraries, respectively. Abbreviations are the same as those given in Table 2."

Table 3

Detail for differentially expressed circRNA identified between the bast barks of MPS and TPS"

Fig. 4

Relative expression level of ten circRNAs stem bark tissues of MPS and TPS by qRT-PCR in ramie Abbreviations are the same as those given in Table 2."