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Guillemond (G.) B. Ouellette. -B.A. degree (1952) Moncton University; - Ph.D. (1960) Department of Plant Pathology, Cornell Univestiy; - Research Scientist (1958 on), Laurentian Forestry Centre (LFC), Québec, NRCan; retired in 1995 with status of emeritus researcher. Research fields: Histopathology of Dutch elm disease and other tree diseases, mycology, other wilt diseases...The present work could be dedicated to many people, including parents and members of the family. Mr Lorne Howett, a pathologist working at the Canada Experimental Farm (Fredericton, NB), and with who the author has spent two summers (1953 and 1954) as a student assistant, has been the “pilot” orienting this author towards undertaking graduate studies in Plant Pathology. The encouragement received from Dr Marcel Lortie, a former director of LFC, particularly towards undertaking studies on wilt diseases related to DED, is acknowledged here. Several dedicated professors were met during the years of study, particularly those at Cornell. Among these, Dr Richard Korf has remained for this author a model, arousing great interest for mycology. Prof. Emil Müller and Dr Orlando Petrini have spared no efforts to make most agreeable for he incumbent and his family the sabbatical stays he spent in Zürich, at the Swiss Polytechnical Institute (ETH) (1968-69, and 1990).
Hélène Chamberland. - B.Sc. (1972) and M.Sc. (1979), Dept of Biology, and Ph.D. (1989) Dept of Plant Sciences «Université Laval» ; - research assistant, Dept of Biology, of this University, and LFC; - coordinator of the microscopy unit (confocal and electron microscopes) located in the «Life Science Building», «Université Laval». Research fields: Phytopathology, mycology, and other biological domains, such as basic cellular cytology of nuclei and other cell organelles during embryogenesis, seed germination and so on, specializing in the use of gold complex probes. This work was the occasion of appreciated collaborations with several researchers (J.- G. Lafontaine, Université Laval; G.B. Ouellette, LFC; M. Nicole, IRDU, Montpellier, France) and with students. The present articles and many others are good examples of notable contributions to the value of using these probes.
Pierre Mathieu Charest. - B.Sc. (1977), Ph.D. (1984) from «l’ Université Laval» Dept of Plant Sciences;- postdoctoral stay (1984-85) in the Dept of Cellular Biology, “Biozentrum, Basel University, CH”, in the laboratory of Prof. J. Röth; - then professor and researcher in the « Université Laval » Plant Sciences Dept (1985-on), and presently its Director, teaching plant anatomy and histology; - also spent a sabbatical year as invited professor (1991-92) in the Dept of Biochemistry, Baylor College of Medicine, Houston, TX, USA. Research fields: Pathogenesis of “Tomato wilt and crown rot” and of its causal agent (Fusarium oxysporum f.sp. radicis-lycopersici), also making extensive use of gold complex lectins, enzymes, antibodies, including locally produced antibodies to polygalacturonases (now used with great profit by other researchers) to localize the corresponding substrates. Other important contributions concern developing molecular means to detect fungal pathogens in plants and biological disease control measures, particularly regarding the effectiveness and peculiar mode of action of Stachybotrys elegans vs. Rhizoctonia solani


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