Metabolome profiling supports the key role of the spike in wheat yield performance
Autor: | Omar Vergara-Díaz, Rubén Vicente, N. Aparicio, Thomas Vatter, Maria Teresa Nieto-Taladriz, José Luis Araus, Alisdair R. Fernie, Toshihiro Obata, Shawn C. Kefauver |
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Rok vydání: | 2020 |
Předmět: |
0106 biological sciences
0301 basic medicine Canopy Genotype Nitrogen Water stress Nitrogen assimilation Drought tolerance Spike Biology LASSO regression 01 natural sciences Acclimatization Article water stress 03 medical and health sciences Metabolomics wheat Botany Metabolome Blat Biomass Plant metabolites Grain yield lcsh:QH301-705.5 Triticum Principal Component Analysis Bract Dehydration leaf grain yield food and beverages spike General Medicine Metabòlits vegetals Droughts Plant Leaves Leaf 030104 developmental biology lcsh:Biology (General) Wheat Regression Analysis Photorespiration 010606 plant biology & botany |
Zdroj: | Dipòsit Digital de la UB Universidad de Barcelona Repositorio Abierto de la UdL Universitad de Lleida Cells Recercat. Dipósit de la Recerca de Catalunya instname Volume 9 Issue 4 Cells, Vol 9, Iss 1025, p 1025 (2020) Recercat: Dipósit de la Recerca de Catalunya Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
ISSN: | 2016-7652 |
Popis: | Although the relevance of spike bracts in stress acclimation and contribution to wheat yield was recently revealed, the metabolome of this organ and its response to water stress is still unknown. The metabolite profiles of flag leaves, glumes and lemmas were characterized under contrasting field water regimes in five durum wheat cultivars. Water conditions during growth were characterized through spectral vegetation indices, canopy temperature and isotope composition. Spike bracts exhibited better coordination of carbon and nitrogen metabolisms than the flag leaves in terms of photorespiration, nitrogen assimilation and respiration paths. This coordination facilitated an accumulation of organic and amino acids in spike bracts, especially under water stress. The metabolomic response to water stress also involved an accumulation of antioxidant and drought tolerance related sugars, particularly in the spikes. Furthermore, certain cell wall, respiratory and protective metabolites were associated with genotypic outperformance and yield stability. In addition, grain yield was strongly predicted by leaf and spike bracts metabolomes independently. This study supports the role of the spike as a key organ during wheat grain filling, particularly under stress conditions and provides relevant information to explore new ways to improve wheat productivity including potential biomarkers for yield prediction. This work was supported by the Spanish Ministry of Economy and Competitiveness (MEC) [grant number AGL2016-76527- R]. We also acknowledge EIG CONCERT-Japan (EC) / PCIN-2017-063 (MINECO, Spain) project. |
Databáze: | OpenAIRE |
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