Abstract
Transcription factors are crucial for plant growth and development. MADS-box, WRKY, NAC, and SBP-box, some of the most vital transcription factors, are not well identified in Diospyros spp., and their floral development and sex differentiation related functions remain unknown. We identified and analysed 53 MADS-box, 66 WRKY, 83 NAC, and 17 SBP-box transcription factors using the chromosomal D. oleifera genome. There were six DolSBPs identified as miR156 and miR157 targets. According to the multiple sequence alignments of Arabidopsis and D. oleifera proteins and their conserved domains and motifs, DolMADSs were divided into 23 type I and 30 type II. The DolWRKYs, DolNACs, and DolSBPs were divided into 7, 16, and 6 subgroups, respectively. It was found that one DolMADS, five DolWRKYs, one DolNAC, and four DolSBPs may promote unisexual female flowers development, while three DolMADSs, four DolWRKYs, and one DolNAC may enhance unisexual male flowers development. The functions among the different members of the same family may, thus, vary widely. The results will help to elucidate the evolution of the MADS-box, WRKY, NAC, and SBP-box genes families in D. oleifera and to determine their functions in flower development for Diospyros spp.
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