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SPS - Saclay Plant Sciences

George Haughn

Professor

George Haughn
Seed coat differentiation and secondary metabolites of commercial interest

Main research interests

My laboratory uses molecular genetic analysis of the seed coat epidermal cells of Arabidopsis thaliana as a model to investigate plant cell wall biosynthesis, structure and function. The seed coat is a specialized tissue derived from ovule integuments. In some species, including Arabidopsis thaliana, large quantities of polysaccharide mucilage and cellulosic secondary cell wall are produced by seed-coat epidermal cells at specific times during differentiation. Because these secondary cell wall structures are not required for seed viability, the Arabidopsis seed coat epidermal cells represent a unique dispensable tissue that can be used to identify genes involved in complex polysaccharide biosynthesis and secretion.

Selection of 3 major recent publications

Griffiths, J.S., A. Y.-L. Tsai, H. Xue, , C. Voiniciuc, K. Šola, G.J. Seifert, S.D. Mansfield and G.W. Haughn. 2014. SOS5 mediates Arabidopsis seed coat mucilage adherence and organization through pectins. Plant Physiol. 165: 991-1004.

Voiniciuc C., G.H. Dean, J.S. Griffiths, K. Kirchsteiger, Y-T. Hwang, A. Gillett, G. Dow, T.L. Western, M. Estelle, and G.W. Haughn. 2013. FLYING SAUCER1 Is a Transmembrane RING E3 Ubiquitin Ligase That Regulates the Degree of Pectin Methylesterification in Arabidopsis Seed Mucilage. Plant Cell 25: 944-959.

Haughn, G.W. and T.L. Western. 2012. Arabidopsis seed coat mucilage is a specialized cell wall that can be used as a model for genetic analysis of plant cell wall structure and function. Frontiers in Plant Science 3:64.

Address

Department of Botany
University of British Columbia
6270 University Blvd.
Vancouver, BC
Canada  V6T1Z4

george.haughn[at]ubc.ca

University of British Columbia

See also

Embryogenesis, epigenetic control and seed size

Lucia Colombo (University of Milan), Jean-Denis Faure (Labex SPS), Loïc Lepiniec (Labex SPS)

Seed coat differentiation and secondary metabolites of commercial interest

George Haughn (University of British Columbia), Isabelle Debeaujon (LabEx SPS), Helen North (LabEx SPS)

Seed reserve accumulation : yield and quality

John Harada (University of California), Sébastien Baud (LabEx SPS), Bertrand Dubreucq (LabEx SPS)

Desiccation and stress responses

Julia Buitink (INRA Angers), Christophe Bailly (UPMC Paris), Emmanuelle Issakidis-Bourguet (LabEx SPS)

Dormancy, germination and dispersal

Kathleen Donohue (Duke University),  Annie Marion-Poll (LabEx SPS), Loïc Rajjou (LabEx SPS)