Date palm diverts organic solutes for root osmotic adjustment and protects leaves from oxidative damage in early drought acclimation

Bibliographische Detailangaben
Veröffentlicht in:	Journal of experimental botany. - 1985. - (2024) vom: 10. Nov.
1. Verfasser:	Franzisky, Bastian L (VerfasserIn)
Weitere Verfasser:	Mueller, Heike M, Du, Baoguo, Lux, Thomas, White, Philip J, Carpentier, Sebastien Christian, Winkler, Jana Barbro, Schnitzler, Joerg-Peter, Kudla, Jörg, Kangasjärvi, Jaakko, Reichelt, Michael, Mithöfer, Axel, Mayer, Klaus F X, Rennenberg, Heinz, Ache, Peter, Hedrich, Rainer, Messerer, Maxim, Geilfus, Christoph-Martin
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2024
Zugriff auf das übergeordnete Werk:	Journal of experimental botany
Schlagworte:	Journal Article Phoenix dactylifera L Antioxidant Halophyte Lipid metabolism Membrane remodeling Osmolyte Oxidative stress Water deficit reactive oxygen species

Beschreibung
Zusammenfassung:	© The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Experimental Biology. Date palm (Phoenix dactylifera L.) is an important crop in arid regions that is well-adapted to desert ecosystems. To understand the remarkable ability to grow and yield in water-limited environments, experiments with water-withholding for up to four weeks were conducted. In response to drought, root, rather than leaf, osmotic strength increased, with organic solutes such as sugars and amino acids contributing more to the osmolyte increase than minerals. Consistently, carbon and amino acid metabolism was acclimated toward biosynthesis at both the transcriptional and translational levels. In leaves, a remodeling of membrane systems was observed, suggesting changes in thylakoid lipid composition, which together with the restructuring of the photosynthetic apparatus, indicated an acclimation preventing oxidative damage. Thus, xerophilic date palm avoids oxidative damage under drought by combined prevention and rapid detoxification of oxygen radicals. Although minerals were expected to serve as cheap key osmotics, date palm also relies on organic osmolytes for osmotic adjustment of the roots during early drought acclimation. The diversion of these resources away from growth is consistent with date palm's strategy of generally slow growth in harsh environments and clearly indicates a trade-off between growth and stress-related physiological responses
Beschreibung:	Date Revised 10.11.2024 published: Print-Electronic Citation Status Publisher
ISSN:	1460-2431
DOI:	10.1093/jxb/erae456