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Influence of MYB Genes on Secondary Vascular System Developement of Arabidopsis thaliana

  • The Affymetrix whole-transcriptome ATH1 chips were used in laboratory to analyze the gene expression profiles during regeneration of secondary vascular system in poplar, and differentially expressed genes were obtained which might involve in cambium initiation, differentiation and xylem development. In this study, the authors chose 7 genes coding for MYB transcription factors that highly expressed during this process, and studied the gene function using Arabidopsis insertion mutants. One of them was found homozygous in mutant alleles and its secondary walls were clearly thickened, while the cell cavity and quantity of interfascicular fiber from inflorescence stem reduced relatively. Therefore this mutant exhibited changes in secondary cell wall deposition.
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Influence of MYB Genes on Secondary Vascular System Developement of Arabidopsis thaliana

Abstract: The Affymetrix whole-transcriptome ATH1 chips were used in laboratory to analyze the gene expression profiles during regeneration of secondary vascular system in poplar, and differentially expressed genes were obtained which might involve in cambium initiation, differentiation and xylem development. In this study, the authors chose 7 genes coding for MYB transcription factors that highly expressed during this process, and studied the gene function using Arabidopsis insertion mutants. One of them was found homozygous in mutant alleles and its secondary walls were clearly thickened, while the cell cavity and quantity of interfascicular fiber from inflorescence stem reduced relatively. Therefore this mutant exhibited changes in secondary cell wall deposition.

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