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. 2021 Oct 8;22:731. doi: 10.1186/s12864-021-08028-9

Fig. 6.

Fig. 6

Expression profile of PPO genes under developmental and stress conditions. a Heat maps showing the expression levels of 18 PtrPPO genes in different tissues at different developmental stages based on transcriptome data. b Heat maps depicting the expression levels of 18 PtrPPO genes following drought-, beetle-, and mechanical damage. The color bar represents the range of maximum and minimum values of relative expression in the heat map