Reference : N content of phloem and xylem exudates during the transition to flowering in Sinapis ...
Scientific journals : Article
Life sciences : Phytobiology (plant sciences, forestry, mycology...)
http://hdl.handle.net/2268/14581
N content of phloem and xylem exudates during the transition to flowering in Sinapis alba and Arabidopsis thaliana
English
Corbesier, Laurent [Université de Liège - ULg > Département des sciences de la vie > Physiologie végétale > > > > > > >]
Havelange, Andrée mailto [Université de Liège - ULg > Département des sciences de la vie > Physiologie végétale > > > > > >]
Lejeune, Pierre [Université de Liège - ULg > Département des sciences de la vie > Physiologie végétale > > > > >]
Bernier, Georges mailto [Université de Liège - ULg > Sciences de la vie > Physiologie végétale > >]
Périlleux, Claire mailto [Université de Liège - ULg > Département des sciences de la vie > Physiologie végétale >]
2001
Plant, Cell & Environment
Blackwell Publishing
24
367-375
Yes (verified by ORBi)
International
0140-7791
1365-3040
New York
NY
[en] Flowering ; C:N ratio ; phloem ; xylem ; nitrogen ; amino acids
[en] The involvement of nitrogenous substances in the transition to flowering was investigated in Sinapis alba and Arabidopsis thaliana (Columbia). Both species grown in short days (SD) are induced to flower by one long day (LD). In S. alba, the phloem sap (leaf and apical exudates) and the xylem sap (root exudate) were analysed in LD versus SD. In A. thaliana, only the leaf exudate could be analysed but an alternative system for inducing flowering without day-length extension was used: the displaced SD (DSD). Significant results are: (i) in both species, the leaf exudate was enriched in Gln during the inductive LD, at a time compatible with export of the floral stimulus; (ii) in S. alba, the root export of amino acids decreased in LD, whereas the nitrate remained unchanged - thus the extra-Gln found in the leaf exudate should originate from the leaves; (iii) extra-Gln was also found very early in the apical exudate of S. alba in LD, together with more Glu; (iv) in A. thaliana induced by one DSD, the leaf export of Asn increased sharply, instead of Gln in LD. This agrees with Asn prevalence in C-limited plants. The putative role of amino acids in the transition to flowering is discussed.
Commission européenne : Direction générale de la Recherche ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA ; Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Université de Liège (Fonds Spéciaux)
EC contract BI04 CT97-2231; Interuniversity Attraction Poles Programme P4/15
Researchers ; Professionals
http://hdl.handle.net/2268/14581
10.1046/j.1365-3040.2001.00683.x
http://www.ingentaconnect.com/content/bsc/pce/2001/00000024/00000003/art00010

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