Fig. 5

Heatmap of CsAP2/ERFs during the different stages of tea plant bud break. The 62 CsAP2/ERFs clustered into six groups based on their specific expressions during the four stages (S1-S4) of tea plant bud break (S1: T1-T2, S2: T3-T7, S3: T8-T9 and S4: T10-T13). The circular heatmap showed the correlation analysis between the environmental factors and gene expression levels (DMT: daily mean temperature, DHT: daily maximum temperature, DLT: daily minimum temperature). The graph on the right of the heatmap showed the expression patterns of the six distinct clusters. Gene expression levels were represented by standardized FPKM values. The standardization method was z-score, z = (x − µ)/σ (x: original value, z: transformed value, µ: mean and σ: standard deviation)