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  TRICHOME BIREFRINGENCE and Its Homolog AT5G01360 Encode Plant-Specific DUF231 Proteins Required for Cellulose Biosynthesis in Arabidopsis

Bischoff, V., Nita, S., Neumetzler, L., Schindelasch, D., Urbain, A., Eshed, R., et al. (2010). TRICHOME BIREFRINGENCE and Its Homolog AT5G01360 Encode Plant-Specific DUF231 Proteins Required for Cellulose Biosynthesis in Arabidopsis. Plant Physiology, 153(2), 590-602. doi:10.1104/pp.110.153320.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-2457-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0017-DE86-4
Genre: Journal Article

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 Creators:
Bischoff, V.1, Author              
Nita, S.1, Author              
Neumetzler, L.2, Author              
Schindelasch, D.1, Author              
Urbain, A.3, Author
Eshed, R.3, Author
Persson, S.2, Author              
Delmer, D.3, Author
Scheible, W.-R.1, Author              
Affiliations:
1Molecular Genomics, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753328              
2Plant Cell Walls - Persson, Max Planck Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753318              
3External Organizations, ou_persistent22              

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Free keywords: secondary cell-wall plasma-membrane protein glucuronoxylan biosynthesis synthesis inhibitor hydrogen-peroxide binding motifs nadph oxidase gene encodes thaliana synthase
 Abstract: The Arabidopsis (Arabidopsis thaliana) trichome birefringence (tbr) mutant has severely reduced crystalline cellulose in trichomes, but the molecular nature of TBR was unknown. We determined TBR to belong to the plant-specific DUF231 domain gene family comprising 46 members of unknown function in Arabidopsis. The genes harbor another plant-specific domain, called the TBL domain, which contains a conserved GDSL motif known from some esterases/lipases. TBR and TBR-like3 (TBL3) are transcriptionally coordinated with primary and secondary CELLULOSE SYNTHASE (CESA) genes, respectively. The tbr and tbl3 mutants hold lower levels of crystalline cellulose and have altered pectin composition in trichomes and stems, respectively, tissues generally thought to contain mainly secondary wall crystalline cellulose. In contrast, primary wall cellulose levels remain unchanged in both mutants as measured in etiolated tbr and tbl3 hypocotyls, while the amount of esterified pectins is reduced and pectin methylesterase activity is increased in this tissue. Furthermore, etiolated tbr hypocotyls have reduced length with swollen epidermal cells, a phenotype characteristic for primary cesa mutants or the wild type treated with cellulose synthesis inhibitors. Taken together, we show that two TBL genes contribute to the synthesis and deposition of secondary wall cellulose, presumably by influencing the esterification state of pectic polymers.

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Language(s): eng - English
 Dates: 2010-04-152010
 Publication Status: Published in print
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 Identifiers: ISI: ISI:000278340200022
DOI: 10.1104/pp.110.153320
ISSN: 1532-2548 (Electronic)0032-0889 (Linking)
URI: ://000278340200022http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2879772/pdf/590.pdf?tool=pmcentrez
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Title: Plant Physiology
Source Genre: Journal
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Pages: - Volume / Issue: 153 (2) Sequence Number: - Start / End Page: 590 - 602 Identifier: -