Fig. 8
![Fig. 8](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12864-022-08684-5/MediaObjects/12864_2022_8684_Fig8_HTML.png)
Temperature stress- responsive expression profiles of SoBSKs in leaves from spinach heat- sensitive variety Sp73 and heat- tolerant variety Sp75. The data represented the expression levels of SoBSKs after heat (37 °C) or cold (4 °C) treatments for 0, 2, 4, 12, 24 h, respectively. The results were calculated via the 2-ΔΔCt method, and the SoARF was used as reference gene to correct the expression levels of SoBSKs. The heatmap of SoBSKs expression based on the RT-qPCR data standardized by log2 conversion. The color bar on the right of the heat map was based on the RT-qPCR data. Red and blue colors indicated up- and down- regulated genes, respectively