دورية أكاديمية
Nitrogen partitioning and remobilization in relation to leaf senescence, grain yield and grain nitrogen concentration in wheat cultivars
| العنوان: | Nitrogen partitioning and remobilization in relation to leaf senescence, grain yield and grain nitrogen concentration in wheat cultivars |
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| المؤلفون: | Gaju, Oorbessy, Allard, Vincent, Martre, Pierre, Le Gouis, Jacques, Moreau, Delphine, Bogard, Matthieu, M., Hubbart, Stella, Foulkes, M. John |
| المساهمون: | Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, UK (UON), Génétique Diversité et Ecophysiologie des Céréales (GDEC), Institut National de la Recherche Agronomique (INRA)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP), BBSRC, INRA |
| المصدر: | ISSN: 0378-4290 ; Field Crops Research ; https://hal.inrae.fr/hal-02637817Test ; Field Crops Research, 2014, 155, pp.213-223. ⟨10.1016/j.fcr.2013.09.003⟩. |
| بيانات النشر: | HAL CCSD Elsevier |
| سنة النشر: | 2014 |
| المجموعة: | HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand / Université d'Auvergne) |
| مصطلحات موضوعية: | Nitrogen-use efficiency, Nitrogen partitioning, Nitrogen remobilization, Canopy senescence, Wheat breeding, [SDV]Life Sciences [q-bio], [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, [SDE]Environmental Sciences |
| الوصف: | International audience ; Our objective was to investigate the determinants of genetic variation in N accumulation, N partitioning and N remobilization to the grain post-flowering and associations with flag-leaf senescence, grain yield and grain N% in 16 wheat cultivars grown under high N (HN) and low N (LN) conditions in the UK and France. Overall, cultivars ranged in leaf lamina N accumulation at anthesis from 5.32 to 8.03 gN m(-2) at HN and from 2.69 to 3.62 gN m(-2) at LN, and for the stem-and leaf-sheath from 5.45 to 7.25 gN m(-2) at HN and from 2.55 to 3.41 gN m(-2) at LN (P < 0.001). Cultivars ranged in N partitioning index (proportion of above-ground N in the crop component) at anthesis for the leaf lamina from 037 to 0.42 at HN and 0.34 to 0.40 at LN; and for the stem-and leaf-sheath from 0.39 to 0.43 at HN and from 0.35 to 0.41 at LN (P < 0.001). The amount of leaf lamina N remobilized post-anthesis was negatively associated with the duration of post-anthesis flag-leaf senescence amongst cultivars in all experiments under HN. In general, it was difficult to separate genetic differences in lamina N remobilization from those in lamina N accumulation at anthesis. Genetic variation in grain yield and grain N% (through N dilution effects) appeared to be mainly influenced by pre-anthesis N accumulation rather than post-anthesis N remobilization under high N conditions and under milder N stress (Sutton Bonington LN). Where N stress was increased (Clermont Ferrand LN), there was some evidence that lamina N remobilization was a determinant of genetic variation in grain N% although not of grain yield. Our results suggested that selection for lamina N accumulation at anthesis and lamina N remobilization post-anthesis may have value in breeding programmes aimed at optimizing senescence duration and improving grain yield, N-use efficiency and grain N% of wheat. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | hal-02637817; https://hal.inrae.fr/hal-02637817Test; PRODINRA: 259888; WOS: 000328803100024 |
| DOI: | 10.1016/j.fcr.2013.09.003 |
| الإتاحة: | https://doi.org/10.1016/j.fcr.2013.09.003Test https://hal.inrae.fr/hal-02637817Test |
| رقم الانضمام: | edsbas.A712515E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.fcr.2013.09.003 |
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