Philippe DELAVAULT

Study of the parasitic plants from the Orobanche and Phelipanche genera and of the interactions with their host plants by genomic and transcriptomic approaches: - Induction of the germination by the stimulants - Development of the haustorium - Genetic improvement of the resistance of the host plants - Molecular response of the host plant infested by the parasitic plant - Genetic diversity and plastid genome.

• Since 2005 Professor, University of Nantes.
• 2000 Authorization to conduct research (HDR) defenced on February 24, 2000: "Molecular aspects of the genomic and physiological characteristics of parasitic higher plants".
• 1991 - 1995 PhD thesis under the supervision of P. Thalouarn: "Evolution of the plastid genome and its expression in parasitic higher plants".

Professional experience

• 2007 Sabbatical in the laboratory of Professor B. Kunkel, Washington University, Saint Louis, Missouri, USA: "Study of the infectious characteristics of two plant pathogenic organisms: the bacterium P. syringae and the parasitic plant P. ramosa".
• 1995 - 1996 Post-Doctorate in the laboratory of Professor J. Yoder, Department of Vegetable Crops, University of California, Davis, USA: "Identification of genes responsible for plant parasitism".

Researches

• Theme: "Study of parasitic plants of the genera Phelipanche and Orobanche and interactions with their host plants".
• Scientific production: 61 publications in peer-reviewed journals - 47 presentations in conferences, congresses and symposia.
• Supervising 11 doctoral theses, including 2 in co-direction with INRA and Ifremer de Nantes - Supervising 17 students in Master 2.
• Lead partner of the ANR PRCE Project (2017-2019) miPEPiTO
• Scientific leader for the University of Nantes of the ANR PRCE Project (2022-2025) STIGO

Administrative functions

• Head of the team Rhizoplante of Unit in Biological Sciences and Biotechnologies
• Director of the Biology Department

• Lopez-Obando M. et al., 2021. The Physcomitrium (Physcomitrella) patens PpKAI2L receptors for strigolactones and related compounds function via MAX2-dependent and independent pathways. Plant Cell, doi.org/10.1093/plcell/koab217
• de Saint Germain A. et al., 2021. A Phelipanche ramosa KAI2 protein perceives enzymatically strigolactones and isothiocyanates. Plant Communications, doi.org/10.1016/j.xplc.2021.100166
• Brun G. et al., 2021.  Molecular Actors of Seed Germination and Haustoriogenesis in Parasitic Weeds. Plant Physiology, doi.org/10.1093/plphys/kiaa041
• Delavault P., 2020. Are root parasitic plants like any other plant pathogens? New Phytologist 226:641–643, doi.org/10.1111/nph.16504.
• Huet S. et al., 2020. Populations of Phelipanche ramosa influence their seed microbiota. Frontiers in Plant Science doi.org/10.3389/fpls.2020.01075.
• Billard E. et al., 2020. Cytokinin treated microcalli of Phelipanche ramosa: an efficient model for studying haustorium formation in holoparasitic plants. Plant Cell, Tissue and Organ Culture 141:543–553, doi.org/10.1007/s11240-020-01832-3.
• Brun G. et al., 2019. CYP707As are effectors of karrikin and strigolactone signaling pathways in Arabidopsis thaliana and parasitic plants. Plant Cell Environ 42:2612-2626.
• Brun G. et al., 2018. Seed germination in parasitic plants: what insights can we expect from strigolactone research? J Exp Bot 69:2265-2280.
• Delavault P. et al., 2017. Communication Between Host Plants and Parasitic Plants. Advances in Botanical Research, How Plants Communicate with their Biotic Environment 82:55-82.
• Goyet V. et al., 2017. Haustorium initiation in the obligate parasitic plant Phelipanche ramosa involves a host-exudated cytokinin signal. J Exp Bot 68: 5539–5552.
• Delavault P., 2015. Knowing the parasite: Biology and genetics of Orobanche. Helia 38:15-29.
• Lechat M-M. et al., 2015. Seed response to strigolactone is controlled by ABA-independent DNA methylation in the obligate root parasitic plant, Phelipanche ramosa L. Pomel. J Exp Bot 66:3129-3140.
• Péron T. et al., 2012. Role of the sucrose synthase encoding PrSus1 gene in the development of the parasitic plant Phelipanche ramosa L. (Pomel). Mol Plant Microbe Int 25:402-411.
• Lechat MM. et al., 2012. PrCYP707A1, an ABA catabolic gene, is a key component of Phelipanche ramosa seed germination in response to the strigolactone analogue GR24. J Exp Bot 63:5311-5322.
• Auger B. et al., 2012. Germination Stimulants of Phelipanche ramosa in the Rhizosphere of Brassica napus Are Derived from the Glucosinolate Pathway. Mol Plant Microbe Int 7:993-1004.
• Gauthier M. et al., 2012. Characterization of resistance to branched broomrape, Phelipanche ramosa, in winter oilseed rape. Crop Prot 42:56-63.
• Dongo A. et al., 2011. Development of a high-throughput real-time quantitative PCR method to detect and quantify contaminating seeds of Phelipanche ramosa and Orobanche cumana in crop seed lots. Weed Res 52:34-41.
• Pérez-de-Luque A. et al., 2009. Understanding Orobanche and Phelipanche–host plant interactions and developing resistance. Weed Res 49:8-22.
• de Zelicourt A. et al., 2007. Ha-DEF1, a sunflower defensine, induces cell death in Orobanche parasitic plant. Planta 226:591-600
• Letousey P. et al., 2007. Molecular analysis of sunflower resistance mechanisms to Orobanche cumana. Plant Pathol 56:536-546
• Vieira Dos Santos C. et al., 2003. Defence gene expression analysis of Arabidopsis thaliana parasitized by Orobanche ramosa. Phytopathology 93:451-457
• Delavault P. et al., 2002. Isolation of mannose 6-phosphate reductase cDNA, changes in enzyme activity and mannitol content in broomrape (Orobanche ramosa) parasitic on tomato roots. Physiol Plantarum 115:48-55
• Delavault P. et al., 1995. Divergent evolution of two plastid genes, rbcL and atpB, in a non-photosynthetic parasitic plant. Plant Mol Biol 29:1071-1079