To obtain the BrLhc family genes in wucai, the 34 known LHC genes published in Arabidopsis thaliana were downloaded from the TAIR genome database (https://www.arabidopsis.org/) and used as queries in a BLASTP search. The online website MEME (http://meme-suite.org/tools/meme) was used to predict the conserved motifs of the BrLhc protein sequence and construct a schematic diagram of the conserved motifs of the protein [90]. The structure of genes was visualized according to genome annotation files with TBtools [91]. MEGA7.0 software was used to compare the 47 BrLhc protein sequences of wucai, and the neighbor-joining method was used to construct a phylogenetic tree to analyze the evolutionary relationships between the BrLhcs of wucai [92]. The 2000 bp region upstream of the BrLhc genes was used as the promoter sequence by TBtools, and these sequences were submitted to Plant CARE (http://bioinformatics.psb.ugent.be/webtools/plantcare/html/) to predict the BrLhc promoter region cis-acting elements [93]. TBtools was used to visualize the promoter position.
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