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Du, B.* ; Kruse, J.* ; Winkler, J.B. ; Alfarray, S.* ; Schnitzler, J.-P. ; Ache, P.* ; Hedrich, R.* ; Rennenberg, H.*

Climate and development modulate the metabolome and antioxidative system of date palm leaves.

J. Exp. Bot. 70, 5959-5969 (2019)
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Open Access Gold (Paid Option)
Creative Commons Lizenzvertrag
Date palms are remarkably tolerant to environmental stresses, but the mechanisms involved remain poorly characterized. Leaf metabolome profiling was therefore performed on mature (ML) and young (YL) leaves of 2-year-old date palm seedlings that had been grown in climate chambers that simulate summer and winter conditions in eastern Saudi Arabia. Cultivation under high temperature (summer climate) resulted in higher YL H2O2 leaf levels despite increases in dehydroascorbate reductase (DHAR) activities. The levels of raffinose and galactinol, tricarboxylic acid cycle intermediates, and total amino acids were higher under these conditions, particularly in YL. The accumulation of unsaturated fatty acids, 9,12-octadecadienoic acid and 9,12,15-octadecatrienoic acid, was lower in ML. In contrast, the amounts of saturated tetradecanoic acid and heptadecanoic acid were increased in YL under summer climate conditions. The accumulation of phenolic compounds was favored under summer conditions, while flavonoids accumulated under lower temperature (winter climate) conditions. YL displayed stronger hydration, lower H2O2 levels, and more negative delta C-13 values, indicating effective reactive oxygen species scavenging. These findings, which demonstrate the substantial metabolic adjustments that facilitate tolerance to the high temperatures in YL and ML, suggest that YL may be more responsive to climate change.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Amino Acids ; Antioxidants ; Fatty Acids ; Leaf Age ; Membrane Fluidity ; Metabolomics ; Phenolics ; Reactive Oxygen Species ; Temperature Responses; Oxidative Stress; Physiological-responses; Phoenix-dactylifera; Hydrogen-peroxide; Low-temperature; Forest Trees; Differential Response; Tissue Localization; Phenolic-compounds; Fagus-sylvatica
ISSN (print) / ISBN 0022-0957
e-ISSN 1460-2431
Quellenangaben Volume: 70, Issue: 20, Pages: 5959-5969 Article Number: , Supplement: ,
Publisher Oxford University Press
Publishing Place Great Clarendon St, Oxford Ox2 6dp, England
Reviewing status Peer reviewed