Contribution of remobilization to the loading of cadmium in durum wheat grains: impact of post-anthesis nitrogen supply
| العنوان: | Contribution of remobilization to the loading of cadmium in durum wheat grains: impact of post-anthesis nitrogen supply |
|---|---|
| المؤلفون: | Christophe Nguyen, Cécile Coriou, Frédéric Candaudap, Bofang Yan, Jean-Yves Cornu, Sylvie Bussiere, Oleg S. Pokrovsky, Thierry Robert |
| المساهمون: | Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Université Fédérale Toulouse Midi-Pyrénées |
| المصدر: | Plant and Soil Plant and Soil, Springer Verlag, 2018, 424 (1-2), pp.591-606. ⟨10.1007/s11104-018-3560-6⟩ |
| بيانات النشر: | Springer Science and Business Media LLC, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | 0106 biological sciences, low-dose cadmium, cereal, senescence, [SDV]Life Sciences [q-bio], Soil Science, chemistry.chemical_element, stable isotope labeling, Plant Science, Grain filling, 01 natural sciences, Anthesis, Cultivar, 2. Zero hunger, Cadmium, Stable isotope ratio, Maturity (sedimentology), Plant physiology, 04 agricultural and veterinary sciences, post-anthesis uptake, Nitrogen, remobilization, Horticulture, chemistry, [SDE]Environmental Sciences, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, 010606 plant biology & botany |
| الوصف: | International audience; This study focuses on quantifying the contribution of remobilization to the amount of cadmium accumulated in durum wheat grains. The impact of post-anthesis N supply was tested in two cultivars that differ in their shoot biomass partitioning. Two French durum wheat cultivars were grown hydroponically and exposed to 100 nM Cd. After anthesis, the plants were fed with a solution enriched in the stable isotope Cd-111 to trace the Cd newly absorbed, and subjected or not to nitrogen deprivation. Plants were sampled at anthesis and grain maturity to assess the post-anthesis fluxes of Cd and N among organs. Cd remobilized from pre-anthesis stores contributed to more than half of the Cd accumulated in mature grains. Cd was mainly remobilized from stem and poorly remobilized from leaves. Stopping N supply during grain filling enhanced N remobilization but had no impact on post-anthesis uptake and remobilization of Cd, and thereby, on Cd concentration in grains. No difference was observed between the two cultivars in the contribution of Cd remobilization and its dependence toward post-anthesis N supply. Cd remobilization significantly contributes to the accumulation of Cd in durum wheat grains. Cd remobilization is not tightly linked with N remobilization and behaves like a senescent-independent process in durum wheat. |
| تدمد: | 1573-5036 0032-079X |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33cd7a53ca2582ee9fc38a4c9bc309c2Test https://doi.org/10.1007/s11104-018-3560-6Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....33cd7a53ca2582ee9fc38a4c9bc309c2 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15735036 0032079X |
|---|