Article (Scientific journals)
C, N, P concentrations and requirements of flowering Posidonia oceanica shoots
Gobert, Sylvie; Lejeune, Pierre; Lepoint, Gilles et al.
2005In Hydrobiologia, 533, p. 253-259
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Keywords :
seagrass; flowering; Mediterranean sea; carbon; nitrogen; phosphorus; Posidonia
Abstract :
[en] The carbon, nitrogen and phosphorus contents in flowering and nonflowering shoots were compared after an important flowering event occurred in the Posidonia meadow of the Bay of Calvi. The flower formation caused a significant increase of C and a significant decrease of N concentrations in intermediate and adult leaves. Minimum daily requirements in mg shoot(-1) day(-1) of 3.4 and 4.8 of C, 0.09 and 0.09 N, 0.01 and 0.02 of P respectively for nonflowering and flowering shoots were calculated. It shows that additional quantities of C and P are required for the inflorescence elaboration. The unchanged quantity of N required by the shoot for the inflorescence elaboration and the significant modification of N concentration in intermediate and adult leaves suggests that N is limited in the environment and that an efficient resorption of N occurs from leaves to ensure the inflorescence formation.
Disciplines :
Aquatic sciences & oceanology
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Gobert, Sylvie  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Lejeune, Pierre;  STARESO sa
Lepoint, Gilles  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Bouquegneau, Jean-Marie ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Language :
English
Title :
C, N, P concentrations and requirements of flowering Posidonia oceanica shoots
Publication date :
2005
Journal title :
Hydrobiologia
ISSN :
0018-8158
eISSN :
1573-5117
Publisher :
Springer, Dordrecht, Netherlands
Volume :
533
Pages :
253-259
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 20 April 2009

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