Fig. 5

(A) Relative expression levels and gene expression correlations of BvSPL genes in beet seedling roots, stems, and leaves at 0 h, 2 h, and 24 h under eight types of abiotic stress detected using quantitative real-time polymerase chain reaction (qRT-PCR). The lowercase letters above the bars indicate significant treatment differences (α = 0.05, LSD). The expression level of BvSPL gene was normalized to the expression level of BvACTIN, and its relative expression level was displayed at 0 h, 2 and 24 h. (B) Correlation of BvSPL gene expression under eight types of abiotic stress. The expression values of the color gradient mapping from low (blue) to high (red) on the right side of the figure. (C) Predicted protein–protein interaction network of beet BvSPL proteins within the beet. Orange represents BvSPL proteins; blue represents other proteins within the beet; the larger the circle, the more interacting proteins there are