The Dynamics of Phosphorus Uptake and Remobilization during the Grain Development Period in Durum Wheat Plants
Post-anthesis phosphorus (P) uptake and the remobilization of the previously acquired P are the principal sources of grain P nutrition in wheat. However, how the acquired P reaches the grains and its partitioning at the whole plant level remain poorly understood. Here, the temporal dynamics of the n...
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MDPI AG
2022-04-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/11/8/1006 |
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| author | Mohamed El Mazlouzi Christian Morel Thierry Robert Coralie Chesseron Christophe Salon Jean-Yves Cornu Alain Mollier |
| author_facet | Mohamed El Mazlouzi Christian Morel Thierry Robert Coralie Chesseron Christophe Salon Jean-Yves Cornu Alain Mollier |
| author_sort | Mohamed El Mazlouzi |
| collection | DOAJ |
| description | Post-anthesis phosphorus (P) uptake and the remobilization of the previously acquired P are the principal sources of grain P nutrition in wheat. However, how the acquired P reaches the grains and its partitioning at the whole plant level remain poorly understood. Here, the temporal dynamics of the newly acquired P in durum wheat organs and its allocation to grain were examined using pulse-chase <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>32</mn></msup></semantics></math></inline-formula>P-labeling experiments at 5 and 14 days after anthesis. Durum wheat plants were grown hydroponically under high and low P supplies. Each labeling experiment lasted for 24 h. Plants were harvested 24, 48, and 96 h after labeling. Low and high P treatments significantly affected the allocation of the newly acquired P at the whole plant level. Three days (96 h) after the first <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>32</mn></msup></semantics></math></inline-formula>P-labeling, 8% and 4% of the newly acquired P from exogenous solution were allocated to grains, 73% and 55% to the remainder aboveground organs, and 19% and 41% to the roots at low and high P supplies, respectively. Three days after the second labeling, the corresponding values were 48% and 20% in grains, 44% and 53% in the remainder aboveground organs, and 8% and 27% in roots at low and high P supplies, respectively. These results reveal that the dynamics of P allocation to grain was faster in plants grown under low P supply than under high supply. However, the obtained results also indicate that the origin of P accumulated in durum wheat grains was mainly from P remobilization with little contribution from post-anthesis P uptake. The present study emphasizes the role of vegetative organs as temporary storage of P taken up during the grain filling period before its final allocation to grains. |
| first_indexed | 2024-03-09T10:29:57Z |
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| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-09T10:29:57Z |
| publishDate | 2022-04-01 |
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| spelling | doaj.art-3057caa87f5e46159a1f7551ad8680e12023-12-01T21:19:30ZengMDPI AGPlants2223-77472022-04-01118100610.3390/plants11081006The Dynamics of Phosphorus Uptake and Remobilization during the Grain Development Period in Durum Wheat PlantsMohamed El Mazlouzi0Christian Morel1Thierry Robert2Coralie Chesseron3Christophe Salon4Jean-Yves Cornu5Alain Mollier6INRAE, ISPA, Bordeaux Sciences Agro, 33140 Villenave d’Ornon, FranceINRAE, ISPA, Bordeaux Sciences Agro, 33140 Villenave d’Ornon, FranceINRAE, ISPA, Bordeaux Sciences Agro, 33140 Villenave d’Ornon, FranceINRAE, ISPA, Bordeaux Sciences Agro, 33140 Villenave d’Ornon, FranceINRAE, Agroécologie, AgroSup Dijon, University Bourgogne, University Bourgogne Franche-Comté, 21000 Dijon, FranceINRAE, ISPA, Bordeaux Sciences Agro, 33140 Villenave d’Ornon, FranceINRAE, ISPA, Bordeaux Sciences Agro, 33140 Villenave d’Ornon, FrancePost-anthesis phosphorus (P) uptake and the remobilization of the previously acquired P are the principal sources of grain P nutrition in wheat. However, how the acquired P reaches the grains and its partitioning at the whole plant level remain poorly understood. Here, the temporal dynamics of the newly acquired P in durum wheat organs and its allocation to grain were examined using pulse-chase <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>32</mn></msup></semantics></math></inline-formula>P-labeling experiments at 5 and 14 days after anthesis. Durum wheat plants were grown hydroponically under high and low P supplies. Each labeling experiment lasted for 24 h. Plants were harvested 24, 48, and 96 h after labeling. Low and high P treatments significantly affected the allocation of the newly acquired P at the whole plant level. Three days (96 h) after the first <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>32</mn></msup></semantics></math></inline-formula>P-labeling, 8% and 4% of the newly acquired P from exogenous solution were allocated to grains, 73% and 55% to the remainder aboveground organs, and 19% and 41% to the roots at low and high P supplies, respectively. Three days after the second labeling, the corresponding values were 48% and 20% in grains, 44% and 53% in the remainder aboveground organs, and 8% and 27% in roots at low and high P supplies, respectively. These results reveal that the dynamics of P allocation to grain was faster in plants grown under low P supply than under high supply. However, the obtained results also indicate that the origin of P accumulated in durum wheat grains was mainly from P remobilization with little contribution from post-anthesis P uptake. The present study emphasizes the role of vegetative organs as temporary storage of P taken up during the grain filling period before its final allocation to grains.https://www.mdpi.com/2223-7747/11/8/1006phosphoruswheat grain32P tracergrain P concentrationsP accumulationpost-anthesis P uptake |
| spellingShingle | Mohamed El Mazlouzi Christian Morel Thierry Robert Coralie Chesseron Christophe Salon Jean-Yves Cornu Alain Mollier The Dynamics of Phosphorus Uptake and Remobilization during the Grain Development Period in Durum Wheat Plants Plants phosphorus wheat grain 32P tracer grain P concentrations P accumulation post-anthesis P uptake |
| title | The Dynamics of Phosphorus Uptake and Remobilization during the Grain Development Period in Durum Wheat Plants |
| title_full | The Dynamics of Phosphorus Uptake and Remobilization during the Grain Development Period in Durum Wheat Plants |
| title_fullStr | The Dynamics of Phosphorus Uptake and Remobilization during the Grain Development Period in Durum Wheat Plants |
| title_full_unstemmed | The Dynamics of Phosphorus Uptake and Remobilization during the Grain Development Period in Durum Wheat Plants |
| title_short | The Dynamics of Phosphorus Uptake and Remobilization during the Grain Development Period in Durum Wheat Plants |
| title_sort | dynamics of phosphorus uptake and remobilization during the grain development period in durum wheat plants |
| topic | phosphorus wheat grain 32P tracer grain P concentrations P accumulation post-anthesis P uptake |
| url | https://www.mdpi.com/2223-7747/11/8/1006 |
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