PMC9994817_01
The lignin biosynthesis pathway in the ko00940 "phenylpropanoid biosynthesis" pathway and expression level cluster heat maps of key genes in this pathway in the field and lab experiments.
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In our study, most genes in the lignin biosynthesis pathway were annotated, including PAL, CCR, HCT, CAD, PRX, CCoAOMT and COMT genes (Figure 9). In the lab experiment, the expression levels of these genes were higher in LSG samples with stronger freezing tolerance than in GW1 samples under freezing temperature (Figure 9).