Lignin biosynthesis pathway repressors in gymnosperms: differential repressor domains as compared to angiosperms
Lignin is a polyphenolic polymer present in the cell walls of specialized plant cell types in vascular plants that provides structural support and plays a major role in plant protection. The lignin biosynthesis pathway is regulated by transcription factors from the MYB (myeloblastosis) family. While...
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Maximum Academic Press
2024-01-01
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| Series: | Forestry Research |
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| Online Access: | https://www.maxapress.com/article/doi/10.48130/forres-0024-0029 |
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| author | Sonali Sachin Ranade María Rosario García-Gil |
| author_facet | Sonali Sachin Ranade María Rosario García-Gil |
| author_sort | Sonali Sachin Ranade |
| collection | DOAJ |
| description | Lignin is a polyphenolic polymer present in the cell walls of specialized plant cell types in vascular plants that provides structural support and plays a major role in plant protection. The lignin biosynthesis pathway is regulated by transcription factors from the MYB (myeloblastosis) family. While several MYB members positively regulate lignin synthesis, only a few negatively regulate lignin synthesis. These lignin suppressors are well characterized in model plant species; however, their role has not been fully explored in gymnosperms. Lignin forms one of the major hurdles for the forest-based industry e.g. paper, pulp, and biofuel production. Therefore, the detailed mechanisms involved in the regulation of lignin synthesis are valuable, especially in conifers that form the major source of softwood for timber and paper production. In this review, the potential and differential domains present in the MYB suppressors in gymnosperms are discussed, along with their phylogenetic analysis. Sequence analysis revealed that the N-terminal regions of the MYB suppressor members were found to be conserved among the gymnosperms and angiosperms containing the R2, R3, and bHLH domains, while the C-terminal regions were found to be highly variable. The typical repressor motifs like the LxLxL-type EAR motif and the TLLLFR motif were absent from the C-terminal regions of MYB suppressors from most gymnosperms. However, although the gymnosperms lacked the characteristic repressor domains, a R2R3-type MYB member from Ginkgo was reported to repress the lignin biosynthetic pathway. It is proposed that gymnosperms possess unique kinds of repressors that need further functional validation. |
| format | Article |
| id | doaj-art-84775db7a9a346928f1ed4f04bc8370e |
| institution | DOAJ |
| issn | 2767-3812 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Maximum Academic Press |
| record_format | Article |
| series | Forestry Research |
| spelling | doaj-art-84775db7a9a346928f1ed4f04bc8370e2025-08-20T03:18:23ZengMaximum Academic PressForestry Research2767-38122024-01-014115416110.48130/forres-0024-0029forres-0024-0029Lignin biosynthesis pathway repressors in gymnosperms: differential repressor domains as compared to angiospermsSonali Sachin Ranade0María Rosario García-Gil1Umeå Plant Science Centre (UPSC), Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 901 83 Umeå, SwedenUmeå Plant Science Centre (UPSC), Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 901 83 Umeå, SwedenLignin is a polyphenolic polymer present in the cell walls of specialized plant cell types in vascular plants that provides structural support and plays a major role in plant protection. The lignin biosynthesis pathway is regulated by transcription factors from the MYB (myeloblastosis) family. While several MYB members positively regulate lignin synthesis, only a few negatively regulate lignin synthesis. These lignin suppressors are well characterized in model plant species; however, their role has not been fully explored in gymnosperms. Lignin forms one of the major hurdles for the forest-based industry e.g. paper, pulp, and biofuel production. Therefore, the detailed mechanisms involved in the regulation of lignin synthesis are valuable, especially in conifers that form the major source of softwood for timber and paper production. In this review, the potential and differential domains present in the MYB suppressors in gymnosperms are discussed, along with their phylogenetic analysis. Sequence analysis revealed that the N-terminal regions of the MYB suppressor members were found to be conserved among the gymnosperms and angiosperms containing the R2, R3, and bHLH domains, while the C-terminal regions were found to be highly variable. The typical repressor motifs like the LxLxL-type EAR motif and the TLLLFR motif were absent from the C-terminal regions of MYB suppressors from most gymnosperms. However, although the gymnosperms lacked the characteristic repressor domains, a R2R3-type MYB member from Ginkgo was reported to repress the lignin biosynthetic pathway. It is proposed that gymnosperms possess unique kinds of repressors that need further functional validation.https://www.maxapress.com/article/doi/10.48130/forres-0024-0029conifersgymnospermslignin-repressorsmybnorway sprucescots pine |
| spellingShingle | Sonali Sachin Ranade María Rosario García-Gil Lignin biosynthesis pathway repressors in gymnosperms: differential repressor domains as compared to angiosperms Forestry Research conifers gymnosperms lignin-repressors myb norway spruce scots pine |
| title | Lignin biosynthesis pathway repressors in gymnosperms: differential repressor domains as compared to angiosperms |
| title_full | Lignin biosynthesis pathway repressors in gymnosperms: differential repressor domains as compared to angiosperms |
| title_fullStr | Lignin biosynthesis pathway repressors in gymnosperms: differential repressor domains as compared to angiosperms |
| title_full_unstemmed | Lignin biosynthesis pathway repressors in gymnosperms: differential repressor domains as compared to angiosperms |
| title_short | Lignin biosynthesis pathway repressors in gymnosperms: differential repressor domains as compared to angiosperms |
| title_sort | lignin biosynthesis pathway repressors in gymnosperms differential repressor domains as compared to angiosperms |
| topic | conifers gymnosperms lignin-repressors myb norway spruce scots pine |
| url | https://www.maxapress.com/article/doi/10.48130/forres-0024-0029 |
| work_keys_str_mv | AT sonalisachinranade ligninbiosynthesispathwayrepressorsingymnospermsdifferentialrepressordomainsascomparedtoangiosperms AT mariarosariogarciagil ligninbiosynthesispathwayrepressorsingymnospermsdifferentialrepressordomainsascomparedtoangiosperms |