Plant Gene and Trait 2024, Vol.15, No.1, 8-14 http://genbreedpublisher.com/index.php/pgt 11 Figure 3 Phylogenetic tree, motif analysis and gene structure of cucumber SBPgenes Image caption: (A) Phylogenetic analysis of 15 cucumber SBP proteins; (B) Conserved motifs analysis; (C) Gene structure analysis; (D) Conserved motif sequence 2.4 Expression analysis of SBPgenes in different tissues Based on cucumber transcriptome data, the tissue-specific expression of the 15 SBP genes was analyzed in 23 tissues (Figure 4). The results showed that six genes (CsSBP9, CsSBP12, CsSBP10, CsSBP3, CsSBP8 and CsSBP7) were expressed in all tissues, especially CsSBP9 and CsSBP12 from Class II, which had very high expression levels in all 23 tissues. Other genes showed relatively high expression levels in specific tissues, such as CsSBP14, which had higher expression levels in the ovary and fruit skin, and CsSBP15, which was mainly expressed in the reproductive organs and had the highest expression levels in leaves and petioles. These results suggested that SBP genes with high expression levels in specific tissues may play important roles in the development of specific organs.
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