**5. Conclusions**

Taken together, our study results indicated that *CsHCT* cloned from the Chin-Shin Oolong tea plant may be involved in tea plants' response to abiotic stresses (i.e., low temperature, high salinity, and drought) and various hormone signaling pathways that affect tea plants' secondary metabolic pathways.

**Author Contributions:** Conceptualization, C.-Y.Y.; Data curation, C.-H.S.; Formal analysis, C.-H.S.; Project administration, J.T.C.T. and C.-Y.Y.; Supervision, J.T.C.T. and C.-Y.Y.; Writing—original draft preparation, C.-Y.Y.

**Funding:** This work was supported by the National Science Council (NSC MOST 105-2311-B-005-007 and 106-2313-B-005-032-MY2 to Chin-Ying Yang).

**Acknowledgments:** We would like to thank Jian-Syun Chen for his generous supply of tea plants.

**Conflicts of Interest:** The authors declare that they have no conflicts of interest.
