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Open AccessArticle
RcTRP5 Transcription Factor Mediates the Molecular Mechanism of Lignin Biosynthesis Regulation in R. chrysanthum against UV-B Stress
by
Fushuai Gong
Fushuai Gong ,
Wang Yu
Wang Yu ,
Kun Cao
Kun Cao ,
Hongwei Xu
Hongwei Xu and
Xiaofu Zhou
Xiaofu Zhou *
Jilin Provincial Key Laboratory of Plant Resource Science and Green Production, Jilin Normal University, Siping 136000, China
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2024, 25(17), 9205; https://doi.org/10.3390/ijms25179205 (registering DOI)
Submission received: 26 July 2024
/
Revised: 17 August 2024
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Accepted: 23 August 2024
/
Published: 24 August 2024
Abstract
UV-B stress destroys the photosynthetic system of Rhododendron chrysanthum Pall. (R. chrysanthum), as manifested by the decrease of photosynthetic efficiency and membrane fluidity, and also promotes the accumulation of lignin. The MYB (v-myb avian myeloblastosis viral oncogene homolog) family of transcription factors can be involved in the response to UV-B stress through the regulation of lignin biosynthesis. This study indicated that both the donor and recipient sides of the R. chrysanthum were significantly damaged based on physiological index measurements made using OJIP curves under UV-B stress. The analysis of bioinformatics data revealed that the RcTRP5 transcription factor exhibits upregulation of acetylation at the K68 site, directly regulating the biosynthesis of lignin. Additionally, there was upregulation of the K43 site and downregulation of the K83 site of the CAD enzyme, as well as upregulation of the K391 site of the PAL enzyme. Based on these findings, we conjectured that the RcTRP5 transcription factor facilitates acetylation modification of both enzymes, thereby indirectly influencing the biosynthesis of lignin. This study demonstrated that lignin accumulation can alleviate the damage caused by UV-B stress to R. chrysanthum, which provides relevant ideas for improving lignin content in plants, and also provides a reference for the study of the metabolic regulation mechanism of other secondary substances.
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MDPI and ACS Style
Gong, F.; Yu, W.; Cao, K.; Xu, H.; Zhou, X.
RcTRP5 Transcription Factor Mediates the Molecular Mechanism of Lignin Biosynthesis Regulation in R. chrysanthum against UV-B Stress. Int. J. Mol. Sci. 2024, 25, 9205.
https://doi.org/10.3390/ijms25179205
AMA Style
Gong F, Yu W, Cao K, Xu H, Zhou X.
RcTRP5 Transcription Factor Mediates the Molecular Mechanism of Lignin Biosynthesis Regulation in R. chrysanthum against UV-B Stress. International Journal of Molecular Sciences. 2024; 25(17):9205.
https://doi.org/10.3390/ijms25179205
Chicago/Turabian Style
Gong, Fushuai, Wang Yu, Kun Cao, Hongwei Xu, and Xiaofu Zhou.
2024. "RcTRP5 Transcription Factor Mediates the Molecular Mechanism of Lignin Biosynthesis Regulation in R. chrysanthum against UV-B Stress" International Journal of Molecular Sciences 25, no. 17: 9205.
https://doi.org/10.3390/ijms25179205
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