Fig. 2From: Comparative analysis of drought-responsive and -adaptive genes in Chinese wingnut (Pterocarya stenoptera C. DC)Principal component analysis of gene expression based on FPKM. Principal component 1 (PC1; 54% of variance) plotted against principal component 2 (PC2; 26.9% of variance). Red symbols correspond to control samples, blue symbols to treatment samples at 3 h, green symbols to treatment samples at 12 hBack to article page