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Effects of a bacterivorous nematode on rice 32 P uptake and root architecture in a high P-sorbing ferrallitic soil

hal.structure.identifierEcologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
hal.structure.identifierLaboratoire des RadioIsotopes [LRI]
dc.contributor.authorRANOARISOA, Mahafaka Patricia
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMOREL, Christian
hal.structure.identifierLaboratoire des RadioIsotopes [LRI]
dc.contributor.authorANDRIAMANANJARA, Andry
hal.structure.identifierEcologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
dc.contributor.authorJOURDAN, Christophe
hal.structure.identifierEcologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
dc.contributor.authorBERNARD, Laetitia
hal.structure.identifierEcologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
dc.contributor.authorBECQUER, Thierry
hal.structure.identifierLaboratoire des RadioIsotopes [LRI]
dc.contributor.authorRABEHARISOA, Lilia
hal.structure.identifierLaboratoire des RadioIsotopes [LRI]
dc.contributor.authorRAHAJAHARILAZA, Koloina
hal.structure.identifierEcologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
dc.contributor.authorPLASSARD, Claude
hal.structure.identifierEcologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
dc.contributor.authorBLANCHART, Eric
hal.structure.identifierEcologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
hal.structure.identifierLaboratoire des RadioIsotopes [LRI]
dc.contributor.authorTRAP, Jean
dc.date.accessioned2024-04-08T12:04:24Z
dc.date.available2024-04-08T12:04:24Z
dc.date.issued2018
dc.identifier.issn0038-0717
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196309
dc.description.abstractEnSoil bacterivorous nematodes are key plant mutualists that increase nutrient availability for plants either by enhancing the mineralization of organic compounds (the “mineralization pathway”) or by increasing plant lateral root branching following shifts in internal plant metabolism, and subsequently leading to a higher volume of soil prospected by the roots (the “hormonal pathway”). The effects of these organisms on the nutrition of plants growing in strongly nutrient-deficient ferrallitic soils, especially in soils with limited available inorganic phosphorus (P), are poorly known, as are the pathways involved. In our study, using Oryza sativa (Poaceae) and Acrobeloides sp. (Cephalobidae), we tested the “mineralization” and “hormonal” hypotheses in an acidic P-depleted Ferralsol from the Madagascar highlands. We assessed the effect of nematode inoculation on (i) inorganic P flow from soil to plant using the 32P labelling technique and (ii) plant root architecture using a rhizobox device. We showed that the ability of Acrobeloides sp. to enhance P uptake in plants is strongly limited in Ferralsols. However, when the soil pH was corrected with dolomite, Acrobeloides sp. increased plant P uptake probably through the “mineralization” pathway (higher microbial turnover). Indeed, the L-value increased by 49% in the presence of nematodes and dolomite, suggesting the production of unlabelled plant-available P, probably through a higher net P mineralization when the nematodes were inoculated. Using the rhizobox technique, we also observed increased root length in the presence of nematodes but the specific root length, the tip number and the root branching density did not increase in the presence of nematodes, suggesting that nematodes did not increase plant P uptake and growth in this soil as proposed by the “hormonal” hypothesis. From an ecological intensification perspective, to promote agro-ecological development in tropical regions, our results suggest that amending ferrallitic soils with P-rich organic matter and correcting soil pH with an appropriate amount of dolomite may constitute suitable agronomic actionable triggers to drive the mutualistic activity of bacterivorous nematodes.
dc.language.isoen
dc.publisherElsevier
dc.subjectDolomite lime
dc.subjectAcrobeloides sp.
dc.subjectUpland rice
dc.subject.en32P-labelling
dc.subject.enMadagascar
dc.subject.enRhizobox technique
dc.title.enEffects of a bacterivorous nematode on rice 32 P uptake and root architecture in a high P-sorbing ferrallitic soil
dc.typeArticle de revue
dc.identifier.doi10.1016/j.soilbio.2018.04.002
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Géochimie
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
bordeaux.journalSoil Biology and Biochemistry
bordeaux.page39-49
bordeaux.volume122
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02626425
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02626425v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Soil%20Biology%20and%20Biochemistry&rft.date=2018&rft.volume=122&rft.spage=39-49&rft.epage=39-49&rft.eissn=0038-0717&rft.issn=0038-0717&rft.au=RANOARISOA,%20Mahafaka%20Patricia&MOREL,%20Christian&ANDRIAMANANJARA,%20Andry&JOURDAN,%20Christophe&BERNARD,%20Laetitia&rft.genre=article


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