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Contribution of external and internal phosphorus sources to grain P loading in durum wheat (Triticum durum L.) grown under contrasting P levels

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMAZLOUZI, Mohamed
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMOREL, Christian
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorCHESSERON, Coralie
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorROBERT, Thierry
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMOLLIER, Alain
dc.date.accessioned2024-04-08T11:53:36Z
dc.date.available2024-04-08T11:53:36Z
dc.date.issued2020
dc.identifier.issn1664-462X
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195544
dc.description.abstractEnPhosphorus (P) in durum wheat grains after anthesis originates from either the external P source or the internal remobilization of P from different plant organs. The supply of P and its use by the plant are important factors that can affect the contribution of each source to grain P nutrition. Thus, this experiment aimed to quantify the origin of P in grains of durum wheat plants with different P nutritional status. Wheat plants were grown from juvenile stages to maturity in complete nutrient solutions with either high (0.125 mM) or low (0.025 mM) P concentrations in greenhouse conditions. Phosphorus in nutrient solutions was spiked by introducing 32 P after anthesis to quantify the external P uptake and its partitioning within plant organs (spikelets, leaves, stems, roots, and post-anthesis tillers) and grains. Phosphorus use efficiency in durum wheat plants was also determined. The low and high P supply resulted in two highly different plant nutritional P status. Plants with low P status remobilized most of their stored P in all organs and allocated more than 72% of post-anthesis P uptake to grain P nutrition, whereas in the high P plants this was only 56%. Enhanced remobilization of P and the efficient allocation of newly acquired P to grains were crucial for durum wheat grain P nutrition grown under low P supply. The remobilization of P represented 81% of grain P in low P plants while it represented 65% for high P plants. Organs that contributed the most to P remobilization in low P plants were spikelets (43%) and leaves (35%). The post-anthesis tiller development was reduced in low P plants suggesting a preferential allocation of P to grains under this treatment. We concluded that P loading into grains in durum wheat is mainly derived from the remobilization of internal P sources stored before anthesis, even at high external P supply during grain filling.
dc.language.isoen
dc.publisherFrontiers
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enDurum wheat
dc.subject.enPhosphorus
dc.subject.en32 P tracer
dc.subject.enGrain P concentrations
dc.subject.enPost-anthesis P uptake
dc.subject.enP remobilization
dc.subject.enHydroponic conditions
dc.title.enContribution of external and internal phosphorus sources to grain P loading in durum wheat (Triticum durum L.) grown under contrasting P levels
dc.typeArticle de revue
dc.identifier.doi10.3389/fpls.2020.00870
dc.subject.halSciences de l'environnement
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalFrontiers in Plant Science
bordeaux.page1-10
bordeaux.volume11
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02907180
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02907180v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Frontiers%20in%20Plant%20Science&rft.date=2020&rft.volume=11&rft.spage=1-10&rft.epage=1-10&rft.eissn=1664-462X&rft.issn=1664-462X&rft.au=MAZLOUZI,%20Mohamed&MOREL,%20Christian&CHESSERON,%20Coralie&ROBERT,%20Thierry&MOLLIER,%20Alain&rft.genre=article


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