[en] Arabidopsis thaliana ; C : N ratio ; floral stimulus ; flowering ; phloem sap ; Sinapis alba
[en] In plants of Sinapis alba and Arabidopsis thaliana, leaf exudate (phloem sap) was analysed during and after a single long day inducing flowering and in control short days. The amounts of carbohydrates and amino acids were measured to estimate the organic C : N ratio. In both species, the C : N ratio of the phloem sap increased markedly and early during the inductive treatment, suggesting that an inequality in organic C and N supply to the apical meristem may be important at floral transition.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; Commission européenne : Direction générale de la Recherche ; University de Liège (Fonds Spéciaux)
EC contract BI04 CT97-2231; Interuniversity Attraction Poles Programme P4/15