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

Metabolic responses of date palm (Phoenix dactylifera L.) leaves to drought differ in summer and winter climate.

Tree Physiol. 41, 1685-1700 (2021)
Verlagsversion Postprint Forschungsdaten DOI PMC
Open Access Green
Drought negatively impacts growth and productivity of plants, particularly in arid and semi-arid regions. Although drought events can take place in summer and winter, differences on the impact of drought on physiological processes between seasons are largely unknown. The aim of this study was to elucidate metabolic strategies of date palms in response to drought in summer and winter season. To identify such differences, we exposed date palm seedlings to a drought-recovery regime, both in simulated summer and winter climate. Leaf hydration, carbon discrimination (∆13C), primary and secondary metabolite composition and contents were analyzed. Depending on season, drought differently affected physiological and biochemical traits of the leaves. In summer, drought induced significantly decreased leaf hydration, concentrations of ascorbate, most sugars, primary and secondary organic acids, as well as phenolic compounds, while thiol, amino acid, raffinose and individual fatty acid contents were increased compared to well-watered plants. In winter, drought had no effect on leaf hydration, ascorbate and fatty acids contents, but resulted in increased foliar thiol and amino acid levels as observed in summer. Compared to winter, foliar traits of plants exposed to drought in summer only partly recovered after re-watering. Memory effects on water relations, primary and secondary metabolites seem to prepare foliar traits of date palms for repeated drought events in summer. Apparently, a well-orchestrated metabolic network, including the anti-oxidative system, compatible solutes accumulation and osmotic adjustment, and maintenance of cell membrane stability strongly reduces the susceptibility of date palms to drought. These mechanisms of drought compensation may be more frequently required in summer.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
Schlagwörter Anti-oxidative System ; Compatible Solutes ; Date Palm (phoenix Dactylifera L ; Drought ; Fatty Acids ; High Temperature ; Memory Effects ; Nitrogen Composition; Physiological-responses; Lipid-composition; Arachidonic-acid; United-states; Stress; Heat; Arabidopsis; Forest; Plants; Water
ISSN (print) / ISBN 0829-318X
e-ISSN 1758-4469
Zeitschrift Tree Physiology
Quellenangaben Band: 41, Heft: 9, Seiten: 1685-1700 Artikelnummer: , Supplement: ,
Verlag Oxford University Press
Verlagsort Great Clarendon St, Oxford Ox2 6dp, England
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed
Institut(e) Research Unit Environmental Simulation (BIOP-EUS)
Förderungen Science and Technology Department of Sichuan Province
Mianyang Normal University
King Saud University, Riyadh, Saudi Arabia