Fig. 3
Analysis of antioxidant substances and anthocyanin synthesis structure gene expression levels in potato tubers and their correlation. (a) Effects of proper low-temperature treatment on the accumulation of antioxidant substances in Jianchuanhong tubers and Huaxinyangyu tubers. (b) Relative expression levels of structural genes involved in the anthocyanin synthesis pathway in two potato tubers. (c) Correlation analysis of physiological indexes and structural genes of potato tubers. Red represents a positive correlation, and blue represents a negative correlation. The data are the mean ± SD; n = 3; the larger the value, the more significant it is (P < 0.05)