Genome-Wide Identification and Expression Analysis of Family Genes in Lour.

GATA transcription factors, which are DNA-binding proteins with type IV zinc finger binding domains, have a role in transcriptional regulation in biological organisms. They have an indispensable role in the growth and development of plants, as well as in improvements in their ability to face various environmental stresses. To date, have been identified in many gene families, but the gene in longan ( Lour) has not been studied in previous explorations. Various aspects of genes in the longan family, including their identification and classification, the distribution of their positions on chromosomes, their exon/intron structures, a synteny analysis, their expression at different temperatures, concentration of PEG, early developmental stages of somatic embryos and their expression levels in different tissues, and concentrations of exogenous hormones, were investigated in this study. This study showed that the 22 could be divided into four subfamilies. There were 10 pairs of homologous genes in the synteny analysis of and . Four segmental replication motifs and one pair of tandem duplication events were present among the family members. The -acting elements located in promoter regions were also found to be enriched with light-responsive elements, which contained related hormone-responsive elements. In somatic embryos, is upregulated for expression at the globular embryo (GE) stage. We also found that expression was strongly up-regulated in roots and stems. The study demonstrated the expression of under hormone (ABA and IAA) treatments in embryogenic callus of longan. Under ABA treatment, was up-regulated and the other genes did not respond significantly. Moreover, as demonstrated with qRT-PCR, the expression of genes showed strong up-regulated expression levels under 100 μmol·L-1 concentration IAA treatment. This experiment further studied these and simulated their possible connections with a drought response mechanism, while correlating them with their expression under PEG treatment. Overall, this experiment explored the genes and dug into their evolution, structure, function, and expression profile, thus providing more information for a more in-depth study of the characteristics of the family of genes.