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Title: SECONDARY WALL ASSOCIATED MYB 1 is a positive regulator of secondary cell wall thickening in Brachypodium distachyon and is not found in the Brassicaceae

Abstract

Summary Grass biomass is comprised chiefly of secondary walls that surround fiber and xylem cells. A regulatory network of interacting transcription factors in part regulates cell wall thickening. We identified Brachypodium distachyon SECONDARY WALL ASSOCIATED MYB 1 ( SWAM 1 ) as a potential regulator of secondary cell wall biosynthesis based on gene expression, phylogeny, and transgenic plant phenotypes. SWAM 1 interacts with cellulose and lignin gene promoters with preferential binding to AC ‐rich sequence motifs commonly found in the promoters of cell wall‐related genes. SWAM 1 overexpression ( SWAM ‐ OE ) lines had greater above‐ground biomass with only a slight change in flowering time while SWAM 1 dominant repressor ( SWAM 1‐ DR ) plants were severely dwarfed with a striking reduction in lignin of sclerenchyma fibers and stem epidermal cell length. Cellulose, hemicellulose, and lignin genes were significantly down‐regulated in SWAM 1‐ DR plants and up‐regulated in SWAM 1‐ OE plants. There was no reduction in bioconversion yield in SWAM 1‐ OE lines; however, it was significantly increased for SWAM 1‐ DR samples. Phylogenetic and syntenic analyses strongly suggest that the SWAM 1 clade was present in the last common ancestor between eudicots and grasses, but ismore » not in the Brassicaceae. Collectively, these data suggest that SWAM 1 is a transcriptional activator of secondary cell wall thickening and biomass accumulation in B. distachyon .« less

Authors:
 [1];  [2];  [3];  [4];  [5];  [1];  [2];  [1];  [2];  [1];  [3];  [2];  [6];  [6];  [6];  [6];  [2];  [4];  [2]
  1. Biology Department University of Massachusetts Amherst MA 01003 USA, Plant Biology Graduate Program University of Massachusetts Amherst MA 01003 USA
  2. Biology Department University of Massachusetts Amherst MA 01003 USA
  3. Biology Department University of Massachusetts Amherst MA 01003 USA, Molecular and Cellular Biology Graduate Program University of Massachusetts Amherst MA 01003 USA
  4. Department of Microbiology and Plant Biology University of Oklahoma Norman OK 73019 USA
  5. Department of Crop and Soil Sciences Washington State University Pullman WA 99164 USA
  6. DOE Joint Genome Institute Walnut Creek CA 94598 USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1469734
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
The Plant Journal
Additional Journal Information:
Journal Name: The Plant Journal Journal Volume: 96 Journal Issue: 3; Journal ID: ISSN 0960-7412
Publisher:
Wiley-Blackwell
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Handakumbura, Pubudu P., Brow, Kathryn, Whitney, Ian P., Zhao, Kangmei, Sanguinet, Karen A., Lee, Scott J., Olins, Jennifer, Romero‐Gamboa, Sandra P., Harrington, Michael J., Bascom, Carlisle J., MacKinnon, Kirk J‐M., Veling, Michael T., Liu, Lifeng, Lee, Ji E., Vogel, John P., O'Malley, Ronan C., Bezanilla, Magdalena, Bartley, Laura E., and Hazen, Samuel P. SECONDARY WALL ASSOCIATED MYB 1 is a positive regulator of secondary cell wall thickening in Brachypodium distachyon and is not found in the Brassicaceae. United Kingdom: N. p., 2018. Web. doi:10.1111/tpj.14047.
Handakumbura, Pubudu P., Brow, Kathryn, Whitney, Ian P., Zhao, Kangmei, Sanguinet, Karen A., Lee, Scott J., Olins, Jennifer, Romero‐Gamboa, Sandra P., Harrington, Michael J., Bascom, Carlisle J., MacKinnon, Kirk J‐M., Veling, Michael T., Liu, Lifeng, Lee, Ji E., Vogel, John P., O'Malley, Ronan C., Bezanilla, Magdalena, Bartley, Laura E., & Hazen, Samuel P. SECONDARY WALL ASSOCIATED MYB 1 is a positive regulator of secondary cell wall thickening in Brachypodium distachyon and is not found in the Brassicaceae. United Kingdom. https://doi.org/10.1111/tpj.14047
Handakumbura, Pubudu P., Brow, Kathryn, Whitney, Ian P., Zhao, Kangmei, Sanguinet, Karen A., Lee, Scott J., Olins, Jennifer, Romero‐Gamboa, Sandra P., Harrington, Michael J., Bascom, Carlisle J., MacKinnon, Kirk J‐M., Veling, Michael T., Liu, Lifeng, Lee, Ji E., Vogel, John P., O'Malley, Ronan C., Bezanilla, Magdalena, Bartley, Laura E., and Hazen, Samuel P. Wed . "SECONDARY WALL ASSOCIATED MYB 1 is a positive regulator of secondary cell wall thickening in Brachypodium distachyon and is not found in the Brassicaceae". United Kingdom. https://doi.org/10.1111/tpj.14047.
@article{osti_1469734,
title = {SECONDARY WALL ASSOCIATED MYB 1 is a positive regulator of secondary cell wall thickening in Brachypodium distachyon and is not found in the Brassicaceae},
author = {Handakumbura, Pubudu P. and Brow, Kathryn and Whitney, Ian P. and Zhao, Kangmei and Sanguinet, Karen A. and Lee, Scott J. and Olins, Jennifer and Romero‐Gamboa, Sandra P. and Harrington, Michael J. and Bascom, Carlisle J. and MacKinnon, Kirk J‐M. and Veling, Michael T. and Liu, Lifeng and Lee, Ji E. and Vogel, John P. and O'Malley, Ronan C. and Bezanilla, Magdalena and Bartley, Laura E. and Hazen, Samuel P.},
abstractNote = {Summary Grass biomass is comprised chiefly of secondary walls that surround fiber and xylem cells. A regulatory network of interacting transcription factors in part regulates cell wall thickening. We identified Brachypodium distachyon SECONDARY WALL ASSOCIATED MYB 1 ( SWAM 1 ) as a potential regulator of secondary cell wall biosynthesis based on gene expression, phylogeny, and transgenic plant phenotypes. SWAM 1 interacts with cellulose and lignin gene promoters with preferential binding to AC ‐rich sequence motifs commonly found in the promoters of cell wall‐related genes. SWAM 1 overexpression ( SWAM ‐ OE ) lines had greater above‐ground biomass with only a slight change in flowering time while SWAM 1 dominant repressor ( SWAM 1‐ DR ) plants were severely dwarfed with a striking reduction in lignin of sclerenchyma fibers and stem epidermal cell length. Cellulose, hemicellulose, and lignin genes were significantly down‐regulated in SWAM 1‐ DR plants and up‐regulated in SWAM 1‐ OE plants. There was no reduction in bioconversion yield in SWAM 1‐ OE lines; however, it was significantly increased for SWAM 1‐ DR samples. Phylogenetic and syntenic analyses strongly suggest that the SWAM 1 clade was present in the last common ancestor between eudicots and grasses, but is not in the Brassicaceae. Collectively, these data suggest that SWAM 1 is a transcriptional activator of secondary cell wall thickening and biomass accumulation in B. distachyon .},
doi = {10.1111/tpj.14047},
journal = {The Plant Journal},
number = 3,
volume = 96,
place = {United Kingdom},
year = {Wed Sep 12 00:00:00 EDT 2018},
month = {Wed Sep 12 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
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https://doi.org/10.1111/tpj.14047

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Cited by: 11 works
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