Afficher la notice abrégée

Phosphorus partitioning and accumulation in durum wheat plants as affected by post-anthesis phosphorus supply

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorEL MAZLOUZI, Mohamed
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMOREL, Christian
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorROBERT, Thierry
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorCHESSERON, Coralie
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMOLLIER, Alain
dc.date.accessioned2024-04-08T12:00:28Z
dc.date.available2024-04-08T12:00:28Z
dc.date.issued2019
dc.date.conference2019-07-08
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196077
dc.description.abstractEnPhosphorus (P) management in cropping systems is an important component to secure future food demand. P export with harvested grain is a key step in P cycle in agroecosystems. To improve P use efficiency, plant P uptake and allocation need to be better understood. In wheat, the accumulation of P in grain can originate from both exogenous and endogenous P sources. The aim of this study was to investigate the effect of P supply in post-anthesis period on P partitioning and remobilization in two durum wheat varieties, Dakter and Sculptur. Wheat plants were grown in quarter-strength, Pi-sufficient (+P) Hoagland’s nutrient solution until anthesis. From anthesis, half of plants were transferred on nutrient solution lacking Pi (-P). A set of control plants was maintained on the complete nutrient solution (+P). P uptake, remobilization, and agronomic traits related to yield and grain P were determined. Grain yield was affected by P deprivation only for Dakter. Harvest index was not affected by P treatment and ranged from 50% for Dakter to 61% for Sculptur. Throughout grain filling period, P contents increased in both treatments with a significantly higher increase under +P condition. P deprivation treatment resulted in an enhanced remobilization of P from source organs, mainly leaves, roots and stems (35%, 20% and 17% respectively) to the growing grains in both varieties. P harvest index (PHI) of both varieties responded in the same way to P deprivation treatment by a significant increasing in PHI, ranging from 55% in P sufficient supply and 87% in P deprivation treatment. In term of PUE, Sculptur was more efficient in utilizing the absorbed P than Dakter. PUE increased significantly in P deprivation treatment. Our results suggest that under post-anthesis P deprivation, endogenous P source remobilization can sustain grain growth with minor yield penalties. Thus, optimizing endogenous P remobilization would improve P use efficiency and thereby reduce the need for P fertilization. Further research will concentrate on determining the relative contribution of exogenous and endogenous P source to grain P using isotope tracer technique.
dc.language.isoen
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enphosphorus
dc.subject.enremobilization
dc.subject.engrain filling
dc.title.enPhosphorus partitioning and accumulation in durum wheat plants as affected by post-anthesis phosphorus supply
dc.typeCommunication dans un congrès
dc.subject.halSciences du Vivant [q-bio]
bordeaux.pagenp
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.conference.titleInternational Phosphorus Workshops
bordeaux.countryCH
bordeaux.conference.cityZurich
bordeaux.peerReviewedoui
hal.identifierhal-02198126
hal.version1
hal.invitednon
hal.proceedingsoui
hal.conference.end2019-07-12
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02198126v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2019&rft.spage=np&rft.epage=np&rft.au=EL%20MAZLOUZI,%20Mohamed&MOREL,%20Christian&ROBERT,%20Thierry&CHESSERON,%20Coralie&MOLLIER,%20Alain&rft.genre=unknown


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée