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

Details

Serval ID
serval:BIB_5D86A68CA372
Type
Article: article from journal or magazin.
Collection
Publications
Title
Partitioning of above and below ground costs during phosphate stress in Medicago truncatula
Journal
Journal of Plant Nutrition
Author(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
Publication state
Published
Issued date
2019
Peer-reviewed
Oui
Volume
42
Number
7
Pages
759-771
Language
english
Abstract
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.
Keywords
carbon, legumes, Medicago truncatula, nitrogen fixation, organic acids, phosphate, photosynthesis, Sinorhizobium meliloti, symbiosis
Web of science
Create date
18/04/2019 13:48
Last modification date
20/08/2019 15:15
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