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Two NAC domain transcription factors, SND1 and NST1, function redundantly in regulation of secondary wall synthesis in fibers of Arabidopsis

Secondary walls are the major component of wood, and studies of the mechanisms regulating secondary wall synthesis is important for understanding the process of wood formation. We have previously shown that the NAC domain transcription factor SECONDARY WALL-ASSOCIATED NAC DOMAIN PROTEIN1 (SND1) is a... Full description

Journal Title: Planta 2007-05-01, Vol.225 (6), p.1603-1611
Main Author: Zhong, Ruiqin
Other Authors: Richardson, Elizabeth A , Ye, Zheng-Hua
Format: Electronic Article Electronic Article
Language: English
Subjects:
DNA
Publisher: Berlin: Springer-Verlag
ID: ISSN: 0032-0935
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title: Two NAC domain transcription factors, SND1 and NST1, function redundantly in regulation of secondary wall synthesis in fibers of Arabidopsis
format: Article
creator:
  • Zhong, Ruiqin
  • Richardson, Elizabeth A
  • Ye, Zheng-Hua
subjects:
  • Acetylcysteine
  • Arabidopsis
  • Arabidopsis - cytology
  • Arabidopsis - metabolism
  • Arabidopsis Proteins - genetics
  • Arabidopsis Proteins - metabolism
  • Arabidopsis thaliana
  • Biological and medical sciences
  • Biosynthesis
  • Cell physiology
  • Cell Wall - metabolism
  • Cellulose
  • Deoxyribonucleic acid
  • DNA
  • Domains
  • Down-Regulation
  • Fiber cells
  • Fibers
  • Fundamental and applied biological sciences. Psychology
  • Gene Deletion
  • Gene expression
  • Gene Expression Regulation, Plant
  • Gene regulation
  • Genes
  • Homology
  • Lignin
  • Molecular and cellular biology
  • Mutation
  • Phenotype
  • Plant cells
  • Plants
  • RAPID COMMUNICATION
  • Reduction
  • RNA-mediated interference
  • Signal transduction
  • Stems
  • T-DNA
  • Thickening
  • Transcription factors
  • Transcription Factors - genetics
  • Transcription Factors - metabolism
  • Transcriptional regulatory elements
  • Wall thickness
  • Xylan
  • Xylans
ispartof: Planta, 2007-05-01, Vol.225 (6), p.1603-1611
description: Secondary walls are the major component of wood, and studies of the mechanisms regulating secondary wall synthesis is important for understanding the process of wood formation. We have previously shown that the NAC domain transcription factor SECONDARY WALL-ASSOCIATED NAC DOMAIN PROTEIN1 (SND1) is a key regulator of secondary wall synthesis in fibers of Arabidopsis thaliana stems and dominant repression of SND1 leads to a reduction in secondary wall thickening in fibers. However, T-DNA knockout of the SND1 gene did not cause an alteration in secondary wall thickness, suggesting that other SND1 homologs may compensate for the loss of SND1 expression. Here, we studied the effects of simultaneous inhibition of SND1 and its homolog, NAC SECONDARY WALL THICKENING PROMOTING FACTOR1 (NST1), on secondary wall synthesis in fibers. We show that simultaneous RNA interference (RNAi) inhibition of the expression of both SND1 and NST1 genes results in loss of secondary wall formation in fibers of stems. The fiber cells in the stems of SND1/NST1—RNAi plants lack all three major secondary wall components, including cellulose, xylan, and lignin, which is accompanied by a severe reduction in the expression of genes involved in their biosynthesis. In addition, inhibition of SND1 and NST1 leads to down-regulation of several fiber-associated transcription factor genes. Double T-DNA knockout mutations of SND1 and NST1 genes cause the same effects, as does simultaneous RNAi inhibition of SND1 and NST1. Our results provide first line evidence demonstrating that SND1 and NST1 function redundantly in the regulation of secondary wall synthesis in fibers.
language: eng
source:
identifier: ISSN: 0032-0935
fulltext: no_fulltext
issn:
  • 0032-0935
  • 1432-2048
url: Link


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titleTwo NAC domain transcription factors, SND1 and NST1, function redundantly in regulation of secondary wall synthesis in fibers of Arabidopsis
creatorZhong, Ruiqin ; Richardson, Elizabeth A ; Ye, Zheng-Hua
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descriptionSecondary walls are the major component of wood, and studies of the mechanisms regulating secondary wall synthesis is important for understanding the process of wood formation. We have previously shown that the NAC domain transcription factor SECONDARY WALL-ASSOCIATED NAC DOMAIN PROTEIN1 (SND1) is a key regulator of secondary wall synthesis in fibers of Arabidopsis thaliana stems and dominant repression of SND1 leads to a reduction in secondary wall thickening in fibers. However, T-DNA knockout of the SND1 gene did not cause an alteration in secondary wall thickness, suggesting that other SND1 homologs may compensate for the loss of SND1 expression. Here, we studied the effects of simultaneous inhibition of SND1 and its homolog, NAC SECONDARY WALL THICKENING PROMOTING FACTOR1 (NST1), on secondary wall synthesis in fibers. We show that simultaneous RNA interference (RNAi) inhibition of the expression of both SND1 and NST1 genes results in loss of secondary wall formation in fibers of stems. The fiber cells in the stems of SND1/NST1—RNAi plants lack all three major secondary wall components, including cellulose, xylan, and lignin, which is accompanied by a severe reduction in the expression of genes involved in their biosynthesis. In addition, inhibition of SND1 and NST1 leads to down-regulation of several fiber-associated transcription factor genes. Double T-DNA knockout mutations of SND1 and NST1 genes cause the same effects, as does simultaneous RNAi inhibition of SND1 and NST1. Our results provide first line evidence demonstrating that SND1 and NST1 function redundantly in the regulation of secondary wall synthesis in fibers.
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subjectAcetylcysteine ; Arabidopsis ; Arabidopsis - cytology ; Arabidopsis - metabolism ; Arabidopsis Proteins - genetics ; Arabidopsis Proteins - metabolism ; Arabidopsis thaliana ; Biological and medical sciences ; Biosynthesis ; Cell physiology ; Cell Wall - metabolism ; Cellulose ; Deoxyribonucleic acid ; DNA ; Domains ; Down-Regulation ; Fiber cells ; Fibers ; Fundamental and applied biological sciences. Psychology ; Gene Deletion ; Gene expression ; Gene Expression Regulation, Plant ; Gene regulation ; Genes ; Homology ; Lignin ; Molecular and cellular biology ; Mutation ; Phenotype ; Plant cells ; Plants ; RAPID COMMUNICATION ; Reduction ; RNA-mediated interference ; Signal transduction ; Stems ; T-DNA ; Thickening ; Transcription factors ; Transcription Factors - genetics ; Transcription Factors - metabolism ; Transcriptional regulatory elements ; Wall thickness ; Xylan ; Xylans
ispartofPlanta, 2007-05-01, Vol.225 (6), p.1603-1611
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descriptionSecondary walls are the major component of wood, and studies of the mechanisms regulating secondary wall synthesis is important for understanding the process of wood formation. We have previously shown that the NAC domain transcription factor SECONDARY WALL-ASSOCIATED NAC DOMAIN PROTEIN1 (SND1) is a key regulator of secondary wall synthesis in fibers of Arabidopsis thaliana stems and dominant repression of SND1 leads to a reduction in secondary wall thickening in fibers. However, T-DNA knockout of the SND1 gene did not cause an alteration in secondary wall thickness, suggesting that other SND1 homologs may compensate for the loss of SND1 expression. Here, we studied the effects of simultaneous inhibition of SND1 and its homolog, NAC SECONDARY WALL THICKENING PROMOTING FACTOR1 (NST1), on secondary wall synthesis in fibers. We show that simultaneous RNA interference (RNAi) inhibition of the expression of both SND1 and NST1 genes results in loss of secondary wall formation in fibers of stems. The fiber cells in the stems of SND1/NST1—RNAi plants lack all three major secondary wall components, including cellulose, xylan, and lignin, which is accompanied by a severe reduction in the expression of genes involved in their biosynthesis. In addition, inhibition of SND1 and NST1 leads to down-regulation of several fiber-associated transcription factor genes. Double T-DNA knockout mutations of SND1 and NST1 genes cause the same effects, as does simultaneous RNAi inhibition of SND1 and NST1. Our results provide first line evidence demonstrating that SND1 and NST1 function redundantly in the regulation of secondary wall synthesis in fibers.
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1Arabidopsis
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3Arabidopsis - metabolism
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7Biological and medical sciences
8Biosynthesis
9Cell physiology
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19Gene Deletion
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36T-DNA
37Thickening
38Transcription factors
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abstractSecondary walls are the major component of wood, and studies of the mechanisms regulating secondary wall synthesis is important for understanding the process of wood formation. We have previously shown that the NAC domain transcription factor SECONDARY WALL-ASSOCIATED NAC DOMAIN PROTEIN1 (SND1) is a key regulator of secondary wall synthesis in fibers of Arabidopsis thaliana stems and dominant repression of SND1 leads to a reduction in secondary wall thickening in fibers. However, T-DNA knockout of the SND1 gene did not cause an alteration in secondary wall thickness, suggesting that other SND1 homologs may compensate for the loss of SND1 expression. Here, we studied the effects of simultaneous inhibition of SND1 and its homolog, NAC SECONDARY WALL THICKENING PROMOTING FACTOR1 (NST1), on secondary wall synthesis in fibers. We show that simultaneous RNA interference (RNAi) inhibition of the expression of both SND1 and NST1 genes results in loss of secondary wall formation in fibers of stems. The fiber cells in the stems of SND1/NST1—RNAi plants lack all three major secondary wall components, including cellulose, xylan, and lignin, which is accompanied by a severe reduction in the expression of genes involved in their biosynthesis. In addition, inhibition of SND1 and NST1 leads to down-regulation of several fiber-associated transcription factor genes. Double T-DNA knockout mutations of SND1 and NST1 genes cause the same effects, as does simultaneous RNAi inhibition of SND1 and NST1. Our results provide first line evidence demonstrating that SND1 and NST1 function redundantly in the regulation of secondary wall synthesis in fibers.
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pmid17333250
doi10.1007/s00425-007-0498-y