Fig. 6.

The mechanism of high RA accumulation in Salvia castanea. (a) The contents of RA in eight different tissues including periderm, phloem, xylem and leaf of both annual and perennial S. castanea, respectively. Data presented here are the means of three replicates (mean ± SE). Values followed by different letters indicated significant differences at P < 0.05 levels. (b) The differential expressions of key genes in biosynthetic pathway of RA. (c) Phylogenetic relationship of PAL genes in S. castanea and the other 14 species. (d) Venn diagram regarding to the genes significantly correlated with the contents of RA and SAB. (e) Correlation analyses of fifty-five TFs with the accumulation of RA. The genes shown here were mainly named according to the annotation of Swissprot database and the classification of TF families was defined following the Plant Transcription Factor Database.