The correlation network of DEGs in six significantly associated modules (salmon, green-yellow, light-cyan, green, red, and purple). The size of circles relates to the higher connectivity degree in each module. The red circles represent the putative important candidate genes. ERF, NAC, bHLH, bZIP, DREB1B, WRKY, MYB, and HSF were different transcription factor families, and HSP20, HSP40, HSP70, and HSP90 belong to the HSP family. POD, peroxidase; 6TPP, trehalose-6-phosphate phosphatase; SPS, sucrose-phosphate synthase; NR, nitrate reductase; NCED, 9-cis-epoxycarotenoid dioxygenase; chl, chlorophyllase; GA2ox, GA2 oxidase; GID, gibberellin insensitive dwarf; and ACS, 1-aminocyclopropane-1-carboxylate synthesis.