Phosphorus partitioning and accumulation in durum wheat plants as affected by post-anthesis phosphorus supply
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | EL MAZLOUZI, Mohamed | |
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | MOREL, Christian | |
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | ROBERT, Thierry | |
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | CHESSERON, Coralie | |
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | MOLLIER, Alain | |
| dc.date.accessioned | 2024-04-08T12:00:28Z | |
| dc.date.available | 2024-04-08T12:00:28Z | |
| dc.date.issued | 2019 | |
| dc.date.conference | 2019-07-08 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/196077 | |
| dc.description.abstractEn | Phosphorus (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.iso | en | |
| dc.rights.uri | http://creativecommons.org/licenses/by/ | |
| dc.subject.en | phosphorus | |
| dc.subject.en | remobilization | |
| dc.subject.en | grain filling | |
| dc.title.en | Phosphorus partitioning and accumulation in durum wheat plants as affected by post-anthesis phosphorus supply | |
| dc.type | Communication dans un congrès | |
| dc.subject.hal | Sciences du Vivant [q-bio] | |
| bordeaux.page | np | |
| bordeaux.hal.laboratories | Interactions Soil Plant Atmosphere (ISPA) - UMR 1391 | * |
| bordeaux.institution | Bordeaux Sciences Agro | |
| bordeaux.institution | INRAE | |
| bordeaux.conference.title | International Phosphorus Workshops | |
| bordeaux.country | CH | |
| bordeaux.conference.city | Zurich | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-02198126 | |
| hal.version | 1 | |
| hal.invited | non | |
| hal.proceedings | oui | |
| hal.conference.end | 2019-07-12 | |
| hal.popular | non | |
| hal.audience | Non spécifiée | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-02198126v1 | |
| bordeaux.COinS | ctx_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 |
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