Floraison et réversion chez Sinapis alba. I. Utilisation, pour l'étude de la mise à fleurs, du délai de floraison et du nombre de feuilles de l'axe principal et des axes latéraux

Abstract

The four experiments described permit the following methodological conclusions to be derived: (1) The time required for flowering and the number of leaves preceding the first flower on the principal axis are both necessary to compare the effect of treatments on progress towards flowering. One can conclude that a factor is favorable or unfavorable, only if it entails for both measurements a modification in the same direction. (2) Lateral axes are equally usable even in a case in which the treatment involves a preinduction phase and in which the principal axis alone does not permit a conclusion. In some cases the effect of a factor may be more evident on the lateral axes than on the principal axis.