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- W2888724022 abstract "Summary Cell wall recalcitrance is the major challenge to improving saccharification efficiency in converting lignocellulose into biofuels. However, information regarding the transcriptional regulation of secondary cell wall biogenesis remains poor in switchgrass ( Panicum virgatum ), which has been selected as a biofuel crop in the United States. In this study, we present a combination of computational and experimental approaches to develop gene regulatory networks for lignin formation in switchgrass. To screen transcription factors ( TF s) involved in lignin biosynthesis, we developed a modified method to perform co‐expression network analysis using 14 lignin biosynthesis genes as bait (target) genes. The switchgrass lignin co‐expression network was further extended by adding 14 TF s identified in this study, and seven TF s identified in previous studies, as bait genes. Six TF s (Pv MYB 58/63, Pv MYB 42/85, Pv MYB 4, Pv WRKY 12, Pv SND 2 and Pv SWN 2) were targeted to generate overexpressing and/or down‐regulated transgenic switchgrass lines. The alteration of lignin content, cell wall composition and/or plant growth in the transgenic plants supported the role of the TF s in controlling secondary wall formation. RNA ‐seq analysis of four of the transgenic switchgrass lines revealed downstream target genes of the secondary wall‐related TF s and crosstalk with other biological pathways. In vitro transactivation assays further confirmed the regulation of specific lignin pathway genes by four of the TF s. Our meta‐analysis provides a hierarchical network of TF s and their potential target genes for future manipulation of secondary cell wall formation for lignin modification in switchgrass." @default.
- W2888724022 created "2018-08-31" @default.
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- W2888724022 date "2018-09-17" @default.
- W2888724022 modified "2023-10-15" @default.
- W2888724022 title "Gene regulatory networks for lignin biosynthesis in switchgrass <i>(Panicum virgatum</i>)" @default.
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- W2888724022 doi "https://doi.org/10.1111/pbi.13000" @default.
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