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Light quality affects the growth and antioxidant activity of Forsythia saxatilis in cutting propagation

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Abstract

Forsythia saxatilis is an endangered species endemic to Korea. Here, we determined the effects of light quality on the growth and antioxidant activity of F. saxatilis. Six different light conditions were used: white (W10, control); combined light-emitting diodes (LED) of white (W) and far-red (Fr) at 10:1 (W10Fr1); combined LED of red (R) and blue (B) at 5:5 (R5B5); combined LED of R and B at 7:3 (R7B3); combined LED of R, green (G), and B at 7:1:2 (R7G1B2); and a combined LED of R, G, B, and Fr at 7:1:2:1 (R7G1B2Fr1). Forsythia saxatilis shoot formation was the highest with R7G1B2 at 89%, whereas the greatest growth-promoting effects—that is, increase in plant height, leaf length and width, and fresh and dry weights of shoots and roots—were achieved with W10Fr1. The total phenol and flavonoid contents were the highest with R7B3. The activities of 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) were the highest with R7B3 treatment. In summary, W10Fr1 treatment was found to be the most effective for the growth of F. saxatilis, whereas R7B3 was confirmed to be the most effective for maximizing antioxidant activity.

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Funding

This work was supported by a grant from the National Institute of Biological Resources (NIBR), funded by the Ministry of Environment (MOE) of the Republic of Korea (NIBR202115101).

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Conceptualization, YGP. and ARY.; methodology, YGP. and ARY.; formal analysis, ARY. and HEO.; data curation, YGP.; writing—original draft preparation, ARY. and YGP.; and writing—review and editing, YGP. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Yoo Gyeong Park.

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The authors declare no conflict of interest.

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Communicated by Pramod Kumar Nagar.

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Yoon, A., Oh, H.E. & Park, Y.G. Light quality affects the growth and antioxidant activity of Forsythia saxatilis in cutting propagation. Plant Growth Regul 99, 205–214 (2023). https://doi.org/10.1007/s10725-022-00876-z

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  • DOI: https://doi.org/10.1007/s10725-022-00876-z

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