**5. Conclusions**

Considering flavone content, white LED light for 2 weeks was the most efficient for the production of the three different flavones in the roots, stems, and leaves of *S. baicalensis* seedlings. Based on the results from the current and previous studies, it appears that the effect of different LED lights on the accumulation of secondary metabolites may depend on plant species, and this study reports that white LED lights are the most optimal for flavone accumulation in *S. baicalensis* seedlings.

**Author Contributions:** S.-U.P. and J.-K.K. conceived and designed the experiments. H.-J.Y., C.-H.P., S.-Y.P. and S.-O.C. performed the experiments and analyzed the data. H.-J.Y. and C.-H.P. wrote, reviewed, and edited the manuscript. All authors have read and agreed to the published version of the manuscript.

**Funding:** This work was supported by Incheon National University Research Concentration Professors Grant in 2021.

**Conflicts of Interest:** The authors declare no conflict of interest.

### **Appendix A Appendix A**

the manuscript.

fessors Grant in 2021.

**5. Conclusions** 

**Table A1.** Plant growth method using LED lights.

**Conflicts of Interest:** The authors declare no conflict of interest.

flavone accumulation in *S*. *baicalensis* seedlings.

*Plants* **2021**, *10*, x 9 of 11

Considering flavone content, white LED light for 2 weeks was the most efficient for the production of the three different flavones in the roots, stems, and leaves of *S*. *baicalensis*  seedlings. Based on the results from the current and previous studies, it appears that the effect of different LED lights on the accumulation of secondary metabolites may depend on plant species, and this study reports that white LED lights are the most optimal for

**Author Contributions:** S.-U.P. and J.-K.K. conceived and designed the experiments. H.-J.Y., C.-H.P., S.-Y.P. and S.-O.C. performed the experiments and analyzed the data. H.-J.Y. and C.-H.P. wrote, reviewed, and edited the manuscript. All authors have read and agreed to the published version of

**Funding:** This work was supported by Incheon National University Research Concentration Pro-

