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Table S1: Correlation of Gene Expression Using Suberin Associated Genes as Bait: Some Representative Results Atg Gene Name Locus or Function (r2/n)b Pearson Coefficient (r2 value) GPAT5 CYP86A1 Bait gene Bait gene ASFT CYP86B1 Bait set and selected BAHD genes At3g11430a GPAT5 1.000 0.631 0.583 0.679 0.631 At5g58860a CYP86A1 0.679 1.000 0.766 0.714 0.720 At5g41040a BAHD (ASFT) 0.583 0.766 1.000 0.664 0.671 At5g63560 BAHD 0.632 0.885 0.676 0.754 0.737 At3g48720 BAHD 0.115 0.057 0.059 0.081 At4g24510 BAHD (CER2) 0.186 0.215 0.111 0.244 At5g48930 BAHD (HCT) 0.062 0.082 0.094 0.083 0.080 Genes with strong correlation to suberin bait set At5g09520 Hydroxyproline- 0.693 0.831 0.815 0.756 0.774 0.620 0.873 0.886 0.722 0.775 rich protein At2g48140 Lipid transfer protein At1g68850 Peroxidase 0.715 0.867 0.783 0.880 0.811 At2g21100 Dirigent protein 0.609 0.782 0.801 0.740 0.733 At1g74460a GDSL lipase 0.603 0.921 0.828 0.707 0.765 At3g44540 Acyl reductase 0.693 0.879 0.728 0.765 0.766 At5g23190 CYP86B1 0.679 0.714 0.664 1.000 0.686 At5g13580 ABC 0.780 0.759 0.750 0.657 0.737 Controls – cutin related genes At4g00360 ATT1 CYP86A2 0.008 0.000 0.002 0.004 At1g17840 ABC WBC11 0.165 0.234 0.138 0.181 At1g01610 GPAT4 0.022 0.039 0.039 0.028 At4g00400 GPAT8 0.045 0.024 0.018 0.058 At1g49430* LACS2 0.007 0.000 0.002 0.009 0.005 0.032 Other genes of interest At5g08250 CYP86B2 0.412 0.206 0.236 0.308 0.291 At3g14680 CYP72A14 0.470 0.679 0.638 0.555 0.586 At5g05390 Laccase 0.123 0.066 0.091 0.117 0.099 At3g22400 Lipoxygenase 0.295 0.239 0.271 0.433 0.310 At2g40890 3’-Hydroxylase 0.173 0.301 0.331 0.269 0.269 At4g26220 3’-OH Methylation 0.357 0.523 0.667 0.395 0.486 __________________________________ a Annotated as “relevant candidate genes in suberin synthesis and cork regulation” by Soler et al. (2007). b Self-correlation not included Co-response Analysis: The Cress-express tool (http://www.cressexpress.org/) was used to evaluate gene coexpression between genes of the bait set or studied in this work and all genes from about 1800 Affymetrix Ath1 arrays in the database. All tissue types were included, but arrays for specific experiments were not chosen. The square of Pearson's correlation is given as a score for the measure of coexpression relationship between two genes. Negative transcriptional correlations are highlighted in yellow. Where correlations are positive, the average value of r2 across the four genes with demonstrated roles in suberin biosynthesis, namely GPAT5, CYP86A1, CYP86B1 and ASFT, are shown in the right hand column. The list of candidate genes on the left hand column is not comprehensive, but genes with average (r2/n) values above about 0.6 may have specific roles in suberization.