[Using physiological tests on the selection of cut roses' varieties].
We have observed that the evolution of the senescence in vase can be appreciated by the measures of pH, conductivity, or osmolarity of the petal cell sap of a rose variety. We wanted to check whether these physiological tests could be used to select the post-harvest quality of varieties in process of evaluation. Whereas the measures of pH and osmolarity do not seem to be correlated with the flower's vase life, those of conductivity seem to be linked to it (r=-0.74). As far as the pH is concerned, when the correlation is tested on varieties grouped in colours (white, yellow and ochre; pink and red; multicoloured) and not on the whole mixed varieties, then the correlation seems to be satisfactory, being characterized by r coefficients between -0.78 and -0.91.
Gudin
Serge
S
Institut méditerranéen d'écologie et paléoécologie, faculté de Saint-Jérôme, université Paul-Cézanne, service 442, av. Escadrille-Normandie-Niemen, 13397 Marseille cedex 20, France. serge.gudin@univ-cezanne.fr
Crespel
Laurent
L
Le Bris
Manuel
M
D000375:Aging; D004553:Electric Conductivity; D035264:Flowers / Q000254:growth & development / Q000502:physiology*; D009997:Osmotic Pressure; D027826:Rosa / Q000254:growth & development / Q000502:physiology*; D013997:Time Factors