1. High temperature patterns at the onset of seed maturation determine seed yield and quality in oilseed rape (Brassica napus L.) in relation to sulphur nutrition
- Author
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Marina Le Guédard, Lethicia Magno Massuia de Almeida, Annette Morvan-Bertrand, Tae-Hwan Kim, Alain Mollier, Marie-Hélène Wagner, María Reyes González-Centeno, Jean-Christophe Avice, Sophie Brunel-Muguet, Pierre-Louis Teissedre, Jean-Jacques Bessoule, Ecophysiologie Végétale, Agronomie et Nutritions NCS (EVA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), GEVES Station nationale d'essais de semences, Institut National de la Recherche Agronomique (INRA), Unité de Recherche Oenologie [Villenave d'Ornon], Université de Bordeaux (UB)-Institut des Sciences de la Vigne et du Vin (ISVV)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire de biogenèse membranaire (LBM), Université Bordeaux Segalen - Bordeaux 2-Centre National de la Recherche Scientifique (CNRS), LEB Aquitaine Transfert-ADERA, Yonsei University, Interactions Sol Plante Atmosphère (UMR ISPA), Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Station Nationale d’Essais de Semences (SNES), and Chonnam National University [Gwangju]
- Subjects
0106 biological sciences ,0301 basic medicine ,oilseed rape ,[SDV]Life Sciences [q-bio] ,Brassica ,chemistry.chemical_element ,Plant Science ,01 natural sciences ,thermotolerance ,Desiccation tolerance ,Crop ,high temperature ,03 medical and health sciences ,repeated stresses ,seed quality ,priming ,stress memory ,Ecology, Evolution, Behavior and Systematics ,2. Zero hunger ,biology ,Seed dormancy ,food and beverages ,biology.organism_classification ,Temperature stress ,Sulfur ,Horticulture ,030104 developmental biology ,chemistry ,13. Climate action ,Yield (chemistry) ,[SDE]Environmental Sciences ,Dormancy ,sulphur ,Agronomy and Crop Science ,010606 plant biology & botany - Abstract
International audience; High temperatures during the crop reproductive stage impact seed yield and quality. The changing climate will require consideration of the effects of high temperature events that differ from their intensity, their duration and their frequency over the seed quality-building stages. The impact of these features deserve to be investigated at the light of induced thermo-sensitization which can lead to alleviate expected negative impacts. In our work, maturing seeds of the sulphur-demanding crop, oilseed rape, were exposed to several temperature sequences that varied in intensity, duration and frequency at the onset of seed maturation. Results-measured in seeds that were at the onset of maturation when the temperature stress occurred-indicated that (i) the longer the cumulated duration of the temperature stress, the more negatively impacted the quality criteria with decreased fatty acids (FAs) concentration, increased omega 6:omega 3 ratio, lower seed membrane integrity and increased seed dormancy and (ii) a mild stress event prior to heat peaks had an alleviating effect on the negative impact of the later heat peaks (priming effect) on seed nitrogen, desiccation tolerance and the phytohormones involved in thermoinhibition. Sulphur restriction was positive on FAs, protein concentration and negative on breaking dormancy. In addition, sulphur supply interfered with temperature modality, features such that positive impact of sulphur limitation on boosting oxidative response were cancelled with intense late heat peaks. This work provides insights to define thermopriming protocols in relation to the timing of quality building processes, their respective optimal temperature and adequate sulphur supply.
- Published
- 2021
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