Genome-Wide Identification and Expression Analysis of Heat Shock Transcription Factors in Under Abiotic Stress.

The tea plant () is an economically important crop that plays an important role not only in the beverage industry but also in the pharmaceutical industry. The environment has a great influence on the quality of the tea plant. Heat shock factors (Hsfs) are transcriptional regulators that control the plant response to adversity. However, only a limited number of studies have reported the gene in , and most of these reports involve high-temperature, drought, and salt stress. Research on light, dark, and cold stress is limited. In this study, 22 genes were obtained by whole genome sequencing and found to be located on 11 chromosomes. In addition, the gene structure, protein motif, and phylogeny were studied. We classified the genes into three major subfamilies: CsHsfA, CsHsfB, and CsHsfC. Interestingly, we found that there was more alignment between and genes in dicotyledons, including and , than in the monocotyledon . The expression of many genes was affected by low-temperature, light, and dark abiotic stresses. Notably, and showed high induction rates under both light and cold stress, and both genes carried -acting elements associated with light and low-temperature responses. These results lay a solid groundwork for further investigations into the involvement of genes in the response of to abiotic stresses.