Fig. 2

The OPLS-DA analysis of flavonoids and gene expression in tea buds from shading and UV-B experiments. a The OPLS-DA analysis of flavonoids in tea buds at different time points throughout shading period between the Control and medium shading (S50–60%) treatments. b The OPLS-DA analysis of flavonoids in tea buds at different time points throughout shading period between the Control and heavy shading (S80–90%) treatments. c The OPLS-DA analysis of transcript abundance of all unigenes annotated in transcriptome datasets between the Control and S80–90% treatments. d The OPLS-DA analysis of major catechins in tea buds between the Control and UV-B treatments in the controlled environment. Treatments in the shading experiment in tea plantation are shown as above in Fig. 1. Treatments in the UV-B experiment in the controlled environment are: tea plants exposed to pure PAR (Control); tea plants exposed to PAR + UV-B radiation (UV-B). FPKM, Fragment Per Kilo base of exon model per Million mapped reads. Data shown are from the value of three replicates (n = 3). OPLS-DA analysis was conducted by SIMCA 13.0 (UMETRICS, https://umetrics.com/)