Blanche Dansereau
Laval University
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Publication
Featured researches published by Blanche Dansereau.
Plant Growth Regulation | 1995
G. Garello; Claudine Ménard; Blanche Dansereau; Marie-Thérèse Le Page-Degivry
The aim of this work was to study the impact of light applied during preharvest culture on the subsequent senescence of cut rose flower and to analyse the possible involvement of abscisic acid (ABA). The longevity of cut rose flowers was longer when rose plants were previously grown under high pressure sodium lamps than under metal halide lamps. A change in light source did not lead to a change in leaf ABA content but significantly affected the petal ABA content. The relationship between ABA level and flower longevity, previously reported for differences of genetic origin, was again observed for culture-induced differences: the higher the ABA level at harvest, the shorter the vase-life observed.
Plant and Soil | 2009
Martin Trépanier; M. P. Lamy; Blanche Dansereau
Phalaenopsis cultivars are epiphytic orchid plants with high economic value, largely produced across the world as potted plants or cut flowers. The goal of this experiment is to show if aseptic (in vitro) Phalaenopsis plants can absorb urea with their roots. Young in vitro Phalaenopsis plants were transferred aseptically to a growth medium (solid or liquid) where the three forms of nitrogen (nitrate, ammonium and urea) are equally present and where only one form at a time is marked with 15N. The 15N analysis of the younger leaves of each plant shows that urea and ammonium are the two preferred forms of nitrogen absorbed, with respectively 47% and 41% of the total amount, while nitrate is only absorbed to a level of 12%. The medium analysis revealed that no urea hydrolysis occurred before root absorption. Phalaenopsis roots, probably because of the special nature of velamen, can absorb large amounts of nitrogen directly in urea form. This experiment suggests that the medium of Phalaenopsis in vitro plants could advantageously contain a large proportion of nitrogen in urea form, and that this concept could probably be applied to fertilizer solutions used in growing Phalaenopsis pot plants and other orchids species.
Horttechnology | 2001
Marie-anne Boivin; M. P. Lamy; André Gosselin; Blanche Dansereau
Acta Horticulturae | 1996
Claudine Ménard; Blanche Dansereau; G. Garello; M.Th. Le Page-Degivry
Canadian Journal of Plant Science | 1998
Fabienne Gauthier; Serge Gagnon; Blanche Dansereau
Acta Horticulturae | 1996
G. Garello; M.Th. Le Page-Degivry; Claudine Ménard; Blanche Dansereau
Hortscience | 1996
Marie-Josee Lambert; Blanche Dansereau; Fabienne Gauthier
Hortscience | 1996
Fabienne Gauthier; Blanche Dansereau; Marie-Josee Lambert
Hortscience | 1995
Fabienne Gauthier; Blanche Dansereau; Serge Gagnon
Hortscience | 1995
Marie-anne Boivin; Blanche Dansereau; André Gosselin