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Article

Metabolome Profiling Supports the Key Role of the Spike in Wheat Yield Performance

1
Integrative Crop Ecophysiology Group, Plant Physiology Section, Faculty of Biology, University of Barcelona, Diagonal 643, 08028 Barcelona, Spain
2
AGROTECNIO (Center of Research in Agrotechnology), 25198 Lleida, Spain
3
Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam, Germany
4
National Institute for Agricultural and Food Research and Technology (INIA), Ctra de la Coruña 7.5, 28040 Madrid, Spain
5
Technological and Agrarian Institute of Castilla y León (ITACyL), Agricultural Research. Ctra Burgos km 119, 47041 Valladolid, Spain
*
Author to whom correspondence should be addressed.
Present address: Department of Biochemistry and Center for Plant Science Innovation, University of Nebraska-Lincoln, 1901 Vine Street, Lincoln, NE 68588, USA.
Cells 2020, 9(4), 1025; https://doi.org/10.3390/cells9041025
Received: 3 March 2020 / Revised: 7 April 2020 / Accepted: 15 April 2020 / Published: 21 April 2020
(This article belongs to the Special Issue Metabolomics in Plant Research)
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. View Full-Text
Keywords: LASSO regression; leaf; metabolome; spike; water stress; grain yield; wheat LASSO regression; leaf; metabolome; spike; water stress; grain yield; wheat
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MDPI and ACS Style

Vergara-Diaz, O.; Vatter, T.; Vicente, R.; Obata, T.; Nieto-Taladriz, M.T.; Aparicio, N.; Carlisle Kefauver, S.; Fernie, A.; Araus, J.L. Metabolome Profiling Supports the Key Role of the Spike in Wheat Yield Performance. Cells 2020, 9, 1025. https://doi.org/10.3390/cells9041025

AMA Style

Vergara-Diaz O, Vatter T, Vicente R, Obata T, Nieto-Taladriz MT, Aparicio N, Carlisle Kefauver S, Fernie A, Araus JL. Metabolome Profiling Supports the Key Role of the Spike in Wheat Yield Performance. Cells. 2020; 9(4):1025. https://doi.org/10.3390/cells9041025

Chicago/Turabian Style

Vergara-Diaz, Omar, Thomas Vatter, Rubén Vicente, Toshihiro Obata, Maria T. Nieto-Taladriz, Nieves Aparicio, Shawn Carlisle Kefauver, Alisdair Fernie, and José L. Araus. 2020. "Metabolome Profiling Supports the Key Role of the Spike in Wheat Yield Performance" Cells 9, no. 4: 1025. https://doi.org/10.3390/cells9041025

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