BomalBedonCaronEtAl2008

Référence

Bomal, C., Bedon, F., Caron, S., Mansfield, S.D., Levasseur, C., Cooke, J.E.K., Blais, S., Tremblay, L., Morency, M.-J., Pavy, N., Grima-Pettenati, J., Seguin, A., MacKay, J. (2008) Involvement of Pinus taeda MYB1 and MYB8 in phenylpropanoid metabolism and secondary cell wall biogenesis: A comparative in planta analysis. Journal of Experimental Botany, 59(14):3925-3939. (Scopus )

Résumé

The involvement of two R2R3-MYB genes from Pinus taeda L., PtMYB1 and PtMYB8, in phenylpropanoid metabolism and secondary cell wall biogenesis was investigated in planta. These pine MYBs were constitutively overexpressed (OE) in Picea glauca (Moench) Voss, used as a heterologous conifer expression system. Morphological, histological, chemical (lignin and soluble phenols), and transcriptional analyses, i.e. microarray and reverse transcription quantitative PCR (RT-qPCR) were used for extensive phenotyping of MYB-overexpressing spruce plantlets. Upon germination of somatic embryos, root growth was reduced in both transgenics. Enhanced lignin deposition was also a common feature but ectopic secondary cell wall deposition was more strongly associated with PtMYB8-OE. Microarray and RT-qPCR data showed that overexpression of each MYB led to an overlapping up-regulation of many genes encoding phenylpropanoid enzymes involved in lignin monomer synthesis, while misregulation of several cell wall-related genes and other MYB transcription factors was specifically associated with PtMYB8-OE. Together, the results suggest that MYB1 and MYB8 may be part of a conserved transcriptional network involved in secondary cell wall deposition in conifers. © 2008 The Author(s).

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@ARTICLE { BomalBedonCaronEtAl2008,
    AUTHOR = { Bomal, C. and Bedon, F. and Caron, S. and Mansfield, S.D. and Levasseur, C. and Cooke, J.E.K. and Blais, S. and Tremblay, L. and Morency, M.-J. and Pavy, N. and Grima-Pettenati, J. and Seguin, A. and MacKay, J. },
    TITLE = { Involvement of Pinus taeda MYB1 and MYB8 in phenylpropanoid metabolism and secondary cell wall biogenesis: A comparative in planta analysis },
    JOURNAL = { Journal of Experimental Botany },
    YEAR = { 2008 },
    VOLUME = { 59 },
    PAGES = { 3925-3939 },
    NUMBER = { 14 },
    ABSTRACT = { The involvement of two R2R3-MYB genes from Pinus taeda L., PtMYB1 and PtMYB8, in phenylpropanoid metabolism and secondary cell wall biogenesis was investigated in planta. These pine MYBs were constitutively overexpressed (OE) in Picea glauca (Moench) Voss, used as a heterologous conifer expression system. Morphological, histological, chemical (lignin and soluble phenols), and transcriptional analyses, i.e. microarray and reverse transcription quantitative PCR (RT-qPCR) were used for extensive phenotyping of MYB-overexpressing spruce plantlets. Upon germination of somatic embryos, root growth was reduced in both transgenics. Enhanced lignin deposition was also a common feature but ectopic secondary cell wall deposition was more strongly associated with PtMYB8-OE. Microarray and RT-qPCR data showed that overexpression of each MYB led to an overlapping up-regulation of many genes encoding phenylpropanoid enzymes involved in lignin monomer synthesis, while misregulation of several cell wall-related genes and other MYB transcription factors was specifically associated with PtMYB8-OE. Together, the results suggest that MYB1 and MYB8 may be part of a conserved transcriptional network involved in secondary cell wall deposition in conifers. © 2008 The Author(s). },
    ADDRESS = { Department of Biological Sciences, CW405 Biological Sciences Building, University of Alberta, Edmonton, AB T6G 2E9, Canada },
    COMMENT = { Export Date: 5 December 2008 Source: Scopus CODEN: JEBOA doi: 10.1093/jxb/ern234 },
    ISSN = { 00220957 (ISSN) },
    KEYWORDS = { Coniferophyta, Picea, Picea glauca, Pinus taeda },
    OWNER = { Luc },
    TIMESTAMP = { 2008.12.05 },
    URL = { http://www.scopus.com/scopus/inward/record.url?eid=2-s2.0-55249088062&partnerID=40 },
}

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