Modelling the relative contribution of seed nitrogen reserves and external nitrogen uptake during heterotrophic growth in Medicago truncatula
| العنوان: | Modelling the relative contribution of seed nitrogen reserves and external nitrogen uptake during heterotrophic growth in Medicago truncatula |
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| المؤلفون: | Sophie Brunel-Muguet, Bruno Mary, Carolyne Dürr |
| المساهمون: | Ecophysiologie Végétale, Agronomie et Nutritions (EVA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Recherche Agronomique (INRA), UR 1158 Agroressources et impacts environnementaux, Institut National de la Recherche Agronomique (INRA)-Agroressources et impacts environnementaux (AgroImpact)-Environnement et Agronomie (E.A.)-Biologie et Amélioration des Plantes (BAP), Institut de Recherche en Horticulture et Semences (IRHS), Université d'Angers (UA)-Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Agroressources et Impacts environnementaux (AgroImpact), Institut National de la Recherche Agronomique (INRA), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), AGROCAMPUS OUEST-Institut National de la Recherche Agronomique (INRA)-Université d'Angers (UA) |
| المصدر: | Plant and Soil Plant and Soil, Springer Verlag, 2014, ⟨10.1007/s11104-014-2182-x⟩ Plant and Soil, Springer Verlag, 2014, 386 (1-2), ⟨10.1007/s11104-014-2182-x⟩ |
| بيانات النشر: | Springer Science and Business Media LLC, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | 0106 biological sciences, Nitrogen, Seedling, Soil Science, Plant Science, Biology, 01 natural sciences, Remobilization, Absorption, Hypocotyl, Medicago truncatula, Botany, Radicle, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Mineral absorption, Legume, 2. Zero hunger, food and beverages, Plant physiology, 04 agricultural and veterinary sciences, 15. Life on land, biology.organism_classification, Compartment model, Agronomy, Germination, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, 010606 plant biology & botany |
| الوصف: | Background and aims Heterotrophic growth relies on remobilisation of seed reserves and mineral absorption. We used a compartmental model to investigate the fluxes of N absorption and remobilisation of N reserves in a legume seed with high protein content. Methods Seedling growth was studied during the heterotrophic stage in two genotypes of Medicago truncatula as a function of N supply. N absorption and seed remobilisation fluxes were distinguished in a 15N labelling experiment. Results Remobilisation of seed N reserves was high during germination, but N uptake started as soon as the radicle protruded. Both sources contributed to high elongation rates of the radicle and hypocotyl. When organ lengths stabilised, there was an efflux of N from the cotyledons and roots indicating that seedling growth was limited by carbohydrate production. No significant differences between genotypes were observed except for early N uptake, which was lower in the genotype with the highest initial seed N content. Conclusions N fluxes were similar to those of other non-legume dicotyledonous species but differed from monocotyledonous species. These results improve our understanding of the effects of mineral fertilisation on crop establishment. The compartmental model is a useful tool to analyse N fluxes patterns within and between diverse species, in relation to seed characteristics and soil N availability. |
| تدمد: | 1573-5036 0032-079X |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb63cc9e74913af8922cb2ac95612dd7Test https://doi.org/10.1007/s11104-014-2182-xTest |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....eb63cc9e74913af8922cb2ac95612dd7 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15735036 0032079X |
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