Partitioning of above and below ground costs during phosphate stress in Medicago truncatula

Détails

ID Serval
serval:BIB_5D86A68CA372
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Partitioning of above and below ground costs during phosphate stress in Medicago truncatula
Périodique
Journal of Plant Nutrition
Auteur(s)
Groenewald L.-M., Morcillo R. J. L., Midgley G.F., Kleinert A., Poirier Y., Valentine A.J.
ISSN
1532-4087
ISSN-L
0190-4167
Statut éditorial
Publié
Date de publication
2019
Peer-reviewed
Oui
Volume
42
Numéro
7
Pages
759-771
Langue
anglais
Résumé
Phosphate (P) availability for plant uptake can limit the yield of natural and agricultural systems. Under P limited conditions, the P-requirement of symbiotic nodules of legumes may exacerbate the P stress of host plants. Adaptations to survive under P stress may vary between different functioning tissues. This study investigated the physiological adaptations to P stress in above and below ground organs of nodulated Medicago truncatula Gaertner. Seedlings were inoculated with Sinorhizobium meliloti in quartz sand and fed nutrient solution with either 0.01 mM or 0.5 mM P concentrations. P-stressed nodulated plants showed compromised photosynthetic responses. Alternative growth allocation during stressed conditions was observed between different organs. The concentration of inorganic P, carbon, and nitrogen were lower during stressed conditions. The above ground tissues scavenged P and lowered their dependence on adenosine-triphosphate required for metabolism. Whereas the below ground tissues recycled phosphate from phosphate monoesters in the cell.
Mots-clé
carbon, legumes, Medicago truncatula, nitrogen fixation, organic acids, phosphate, photosynthesis, Sinorhizobium meliloti, symbiosis
Web of science
Création de la notice
18/04/2019 12:48
Dernière modification de la notice
20/08/2019 14:15
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