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PtaRHE1, a Populus tremula x Populus alba RING-H2 protein of the ATL family, has a regulatory role in secondary phloem fibre development

Fabien Baldacci-Cresp, Jihad Moussawi, Jean-Charles Leplé, Rebecca Van Acker (UGent) , Annegret Kohler, Julie Candiracci, Laure Twyffels, Antanas V Spokevicius, Gerd Bossinger, Françoise Laurans, et al.
(2015) PLANT JOURNAL. 82(6). p.978-990
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Abstract
REALLY INTERESTING NEW GENE (RING) proteins play important roles in the regulation of many processes by recognizing target proteins for ubiquitination. Previously, we have shown that the expression of PtaRHE1, encoding a Populus tremulaxPopulus alba RING-H2 protein with E3 ubiquitin ligase activity, is associated with tissues undergoing secondary growth. To further elucidate the role of PtaRHE1 in vascular tissues, we have undertaken a reverse genetic analysis in poplar. Within stem secondary vascular tissues, PtaRHE1 and its corresponding protein are expressed predominantly in the phloem. The downregulation of PtaRHE1 in poplar by artificial miRNA triggers alterations in phloem fibre patterning, characterized by an increased portion of secondary phloem fibres that have a reduced cell wall thickness and a change in lignin composition, with lower levels of syringyl units as compared with wild-type plants. Following an RNA-seq analysis, a biological network involving hormone stress signalling, as well as developmental processes, could be delineated. Several candidate genes possibly associated with the altered phloem fibre phenotype observed in amiRPtaRHE1 poplar were identified. Altogether, our data suggest a regulatory role for PtaRHE1 in secondary phloem fibre development. Significance Statement In poplar, as secondary growth proceeds in stem, PtaRHE1 expression is mainly restricted to secondary phloem tissue where the corresponding protein may function as an E3 ligase to control differentiation of parenchyma cells in secondary phloem fibers within the bark.
Keywords
IDENTIFICATION, LIGNIN, GROWTH, EXPRESSION, GENE, ARABIDOPSIS-THALIANA, TRANSCRIPTION FACTOR, UBIQUITIN LIGASES, CARBOHYDRATE-ACTIVE ENZYMES, Populus tremulaxPopulus alba, phloem fibre development, TREES, vascular tissues, PtaRHE1, RING-H2

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Citation

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MLA
Baldacci-Cresp, Fabien, et al. “PtaRHE1, a Populus Tremula x Populus Alba RING-H2 Protein of the ATL Family, Has a Regulatory Role in Secondary Phloem Fibre Development.” PLANT JOURNAL, vol. 82, no. 6, 2015, pp. 978–90, doi:10.1111/tpj.12867.
APA
Baldacci-Cresp, F., Moussawi, J., Leplé, J.-C., Van Acker, R., Kohler, A., Candiracci, J., … Baucher, M. (2015). PtaRHE1, a Populus tremula x Populus alba RING-H2 protein of the ATL family, has a regulatory role in secondary phloem fibre development. PLANT JOURNAL, 82(6), 978–990. https://doi.org/10.1111/tpj.12867
Chicago author-date
Baldacci-Cresp, Fabien, Jihad Moussawi, Jean-Charles Leplé, Rebecca Van Acker, Annegret Kohler, Julie Candiracci, Laure Twyffels, et al. 2015. “PtaRHE1, a Populus Tremula x Populus Alba RING-H2 Protein of the ATL Family, Has a Regulatory Role in Secondary Phloem Fibre Development.” PLANT JOURNAL 82 (6): 978–90. https://doi.org/10.1111/tpj.12867.
Chicago author-date (all authors)
Baldacci-Cresp, Fabien, Jihad Moussawi, Jean-Charles Leplé, Rebecca Van Acker, Annegret Kohler, Julie Candiracci, Laure Twyffels, Antanas V Spokevicius, Gerd Bossinger, Françoise Laurans, Nicole Brunel, Marjorie Vermeersch, Wout Boerjan, Mondher El Jaziri, and Maria Baucher. 2015. “PtaRHE1, a Populus Tremula x Populus Alba RING-H2 Protein of the ATL Family, Has a Regulatory Role in Secondary Phloem Fibre Development.” PLANT JOURNAL 82 (6): 978–990. doi:10.1111/tpj.12867.
Vancouver
1.
Baldacci-Cresp F, Moussawi J, Leplé J-C, Van Acker R, Kohler A, Candiracci J, et al. PtaRHE1, a Populus tremula x Populus alba RING-H2 protein of the ATL family, has a regulatory role in secondary phloem fibre development. PLANT JOURNAL. 2015;82(6):978–90.
IEEE
[1]
F. Baldacci-Cresp et al., “PtaRHE1, a Populus tremula x Populus alba RING-H2 protein of the ATL family, has a regulatory role in secondary phloem fibre development,” PLANT JOURNAL, vol. 82, no. 6, pp. 978–990, 2015.
@article{6908199,
  abstract     = {{REALLY INTERESTING NEW GENE (RING) proteins play important roles in the regulation of many processes by recognizing target proteins for ubiquitination. Previously, we have shown that the expression of PtaRHE1, encoding a Populus tremulaxPopulus alba RING-H2 protein with E3 ubiquitin ligase activity, is associated with tissues undergoing secondary growth. To further elucidate the role of PtaRHE1 in vascular tissues, we have undertaken a reverse genetic analysis in poplar. Within stem secondary vascular tissues, PtaRHE1 and its corresponding protein are expressed predominantly in the phloem. The downregulation of PtaRHE1 in poplar by artificial miRNA triggers alterations in phloem fibre patterning, characterized by an increased portion of secondary phloem fibres that have a reduced cell wall thickness and a change in lignin composition, with lower levels of syringyl units as compared with wild-type plants. Following an RNA-seq analysis, a biological network involving hormone stress signalling, as well as developmental processes, could be delineated. Several candidate genes possibly associated with the altered phloem fibre phenotype observed in amiRPtaRHE1 poplar were identified. Altogether, our data suggest a regulatory role for PtaRHE1 in secondary phloem fibre development. 
Significance Statement In poplar, as secondary growth proceeds in stem, PtaRHE1 expression is mainly restricted to secondary phloem tissue where the corresponding protein may function as an E3 ligase to control differentiation of parenchyma cells in secondary phloem fibers within the bark.}},
  author       = {{Baldacci-Cresp, Fabien and Moussawi, Jihad and Leplé, Jean-Charles and Van Acker, Rebecca and Kohler, Annegret and Candiracci, Julie and Twyffels, Laure and Spokevicius, Antanas V and Bossinger, Gerd and Laurans, Françoise and Brunel, Nicole and Vermeersch, Marjorie and Boerjan, Wout and El Jaziri, Mondher and Baucher, Maria}},
  issn         = {{0960-7412}},
  journal      = {{PLANT JOURNAL}},
  keywords     = {{IDENTIFICATION,LIGNIN,GROWTH,EXPRESSION,GENE,ARABIDOPSIS-THALIANA,TRANSCRIPTION FACTOR,UBIQUITIN LIGASES,CARBOHYDRATE-ACTIVE ENZYMES,Populus tremulaxPopulus alba,phloem fibre development,TREES,vascular tissues,PtaRHE1,RING-H2}},
  language     = {{eng}},
  number       = {{6}},
  pages        = {{978--990}},
  title        = {{PtaRHE1, a Populus tremula x Populus alba RING-H2 protein of the ATL family, has a regulatory role in secondary phloem fibre development}},
  url          = {{http://doi.org/10.1111/tpj.12867}},
  volume       = {{82}},
  year         = {{2015}},
}
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