Identification and Characterization of SPL Transcription Factor Family Reveals Organization and Chilling-Responsive Patterns in Cabbage (Brassica oleracea var. capitata L.)

Squamosa promoter-binding protein-like (SPL) is a major family of plant-specific transcription factor, which involved in multiple biological processes, such as plant growth and development, hormone response, light response stress response. Therefore, it has been profoundly significant to systematically analyze the SPL Transcription Factors Brassica oleracea. In this study, total 33 BoSPLs were identified B. oleracea genome, they further divided into six subgroups based on phylogenetic tree constructed from proteins oleracea, rapa Arabidopsis thaliana. The expression profile different organs/tissues showed that large number expressed callus, root, stem, leaf, bud, flower silique. addition, levels two (BoSPL9b BoSPL10b) up-regulated chilling tolerance cabbage ‘CT-923’ at 6 h after when compared with normal treatment (mock), while BoSPL15a) sensitive ‘CS-D9’, five (BoSPL1, -9a, -9b, -10b, -11b) BoSPL16a) ‘CS-D9’ 24 stress, indicated these genes may play an important role chilling-tolerance cabbage. We analyzed characteristics provided basis for functional research.