Assessment of nutrient remobilization through structural changes of palisade and spongy parenchyma in oilseed rape leaves during senescence
| العنوان: | Assessment of nutrient remobilization through structural changes of palisade and spongy parenchyma in oilseed rape leaves during senescence |
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| المؤلفون: | Laurent Leport, Alain Bouchereau, François Mariette, Clément Sorin, Maja Musse |
| المساهمون: | Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Food Proceeding Engineering Research Unit, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Université européenne de Bretagne - European University of Brittany (UEB), Regional Council of Bretagne, 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-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST |
| المصدر: | Planta Planta, Springer Verlag, 2015, 241 (2), pp.333-346. ⟨10.1007/s00425-014-2182-3⟩ Planta, 2015, 241 (2), pp.333-346. ⟨10.1007/s00425-014-2182-3⟩ |
| بيانات النشر: | HAL CCSD, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Senescence, HYDRAULIC DESIGN, Membrane permeability, [SDV]Life Sciences [q-bio], Brassica, Plant Science, Biology, Nutrient, WATER STATUS, Gene Expression Regulation, Plant, Arabidopsis, Parenchyma, Botany, MEMBRANE-PERMEABILITY, Genetics, LEAF SENESCENCE, NUCLEAR-MAGNETIC-RESONANCE, Palisade, Cellular Senescence, Plant Proteins, Microscopy, Cell Enlargement, Brassica napus, PLANT DEVELOPMENT, food and beverages, Biological Transport, biology.organism_classification, ARABIDOPSIS, NITROGEN REMOBILIZATION, Plant Leaves, BRASSICA-NAPUS L, SPIN RELAXATION, NMR relaxometry, Oilseed rape |
| الوصف: | International audience; Differential palisade and spongy parenchyma structural changes in oilseed rape leaf were demonstrated. These dismantling processes were linked to early senescence events and associated to remobilization processes. During leaf senescence, an ordered cell dismantling process allows efficient nutrient remobilization. However, in Brassica napus plants, an important amount of nitrogen (N) in fallen leaves is associated with low N remobilization efficiency (NRE). The leaf is a complex organ mainly constituted of palisade and spongy parenchyma characterized by different structures and functions concerning water relations and carbon fixation. The aim of the present study was to demonstrate a specific structural evolution of these parenchyma throughout natural senescence in B. napus, probably linked to differential nutrient remobilization processes. The study was performed on 340 leaves from 32 plants during an 8-week development period under controlled growing conditions. Water distribution and status at the cellular level were investigated by low-field proton nuclear magnetic resonance (NMR), while light and electron microscopy were used to observe cell and plast structure. Physiological parameters were determined on all leaves studied and used as indicators of leaf development and remobilization progress. The results revealed a process of hydration and cell enlargement of leaf tissues associated with senescence. Wide variations were observed in the palisade parenchyma while spongy cells changed only very slightly. The major new functional information revealed was the link between the early senescence events and specific tissue dismantling processes. |
| اللغة: | English |
| تدمد: | 0032-0935 1432-2048 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d8c62028778620765aeed54bc26bdc2Test https://hal.archives-ouvertes.fr/hal-01208765Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....3d8c62028778620765aeed54bc26bdc2 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00320935 14322048 |
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