Genome-Wide Study of Gene Family in Cabbage ( var. L.) and Their Imperative Roles in Response to Cold Stress.

Heat shock protein 90 (Hsp90) plays an important role in plant developmental regulation and defensive reactions. Several plant species have been examined for the family gene. However, the gene family in cabbage has not been well investigated to date. In this study, we have been discovered 12 genes in cabbage ( var. L.). These genes were classified into five groups based on phylogenetic analysis. Among the five groups, group one contains five genes, including , , , , and . Group two contains three genes, including , , and . Group three only includes one gene, including . Group four were consisting of three genes including , , and , and there is no gene from in the fifth group. Synteny analysis showed that a total of 12 genes have a collinearity relationship with 5 genes and 10 genes. The promoter evaluation revealed that the promoters of genes included environmental stress-related and hormone-responsive . RNA-seq data analysis indicates that tissue-specific expression of and were highly expressed in stems, leaves, silique, and flowers. Furthermore, the expression pattern of exhibited that were induced under cold stress, which indicates these genes perform a vital role in cold acclimation and supports in the continual of normal growth and development process. The cabbage gene family was found to be differentially expressed in response to cold stress, suggesting that these genes play an important role in cabbage growth and development under cold conditions.