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dc.contributor.authorFernández Del-Saz, Néstor-
dc.contributor.authorRomero Munar, Antonia-
dc.contributor.authorCawthray, Gregory R.-
dc.contributor.authorPalma, Francisco-
dc.contributor.authorAroca, Ricardo-
dc.contributor.authorBaraza Ruiz, Elena-
dc.contributor.authorFlórez Sarasa, I. D.-
dc.contributor.authorLambers, Hans-
dc.contributor.authorRibas-Carbó, Miquel-
dc.identifierdoi: 10.1111/pce.13155-
dc.identifiere-issn: 1365-3040-
dc.identifierissn: 0140-7791-
dc.identifier.citationPlant, Cell and Environment 41: 865- 875 (2018)-
dc.description.abstractPlants exhibit respiratory bypasses (e.g., the alternative oxidase [AOX]) and increase the synthesis of carboxylates in their organs (leaves and roots) in response to phosphorus (P) deficiency, which increases P uptake capacity. They also show differential expression of high-affinity inorganic phosphorus (Pi) transporters, thus avoiding P toxicity at a high P availability. The association between AOX and carboxylate synthesis was tested in Solanum lycopersicum plants grown at different soil P availability, by using plants grown under P-sufficient and P-limiting conditions and by applying a short-term (24 hr) P-sufficient pulse to plants grown under P limitation. Tests were also performed with plants colonized with arbuscular mycorrhizal fungi, which increased plant P concentration under reduced P availability. The in vivo activities of AOX and cytochrome oxidase were measured together with the concentration of carboxylates and the P concentration in plant organs. Gene transcription of Pi transporters (LePT1 and LePT2) was also studied. A coordinated response between plant P concentration with these traits was observed, indicating that a sufficient P availability in soil led to a suppression of both AOX activity and synthesis of citrate and a downregulation of the transcription of genes encoding high-affinity Pi transporters, presumably to avoid P toxicity.-
dc.description.sponsorshipThis work was financed by the MICINN—Projects BFU2011‐23294 and CTM2014‐53902‐C2‐1‐P. We would like to thank Central metabolism group (MPI) for providing Solanum lycopersicum L. cv Moneymaker seeds, Biel Martorell for his technical help on the IRMS, Amparo Salido Ruiz for her technical help on the ICP‐OES, and Miquel Truyols and collaborators of the UIB Experimental Field and Greenhouses that are supported by the UIB Grant 15/2015.-
dc.publisherBlackwell Publishing-
dc.subjectOxygen Isotope fractionation-
dc.subjectAlternative Oxidase-
dc.subjectPhosphorus limitation-
dc.subjectRespiratory metabolism-
dc.titlePhosphorus concentration coordinates a respiratory bypass, synthesis and exudation of citrate, and the expression of high-affinity phosphorus transporters in Solanum lycopersicum-
dc.description.versionPeer Reviewed-
dc.contributor.funderMinisterio de Economía y Competitividad (España)-
dc.contributor.funderMinisterio de Ciencia e Innovación (España)-
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