Putrescine, a fast-acting switch for tolerance against osmotic stress

Bibliographische Detailangaben
Veröffentlicht in:	Journal of plant physiology. - 1979. - 171(2014), 2 vom: 15. Jan., Seite 48-51
1. Verfasser:	Kotakis, Christos (VerfasserIn)
Weitere Verfasser:	Theodoropoulou, Eleftheria, Tassis, Konstantinos, Oustamanolakis, Charalambos, Ioannidis, Nikolaos E, Kotzabasis, Kiriakos
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2014
Zugriff auf das übergeordnete Werk:	Journal of plant physiology
Schlagworte:	Journal Article A ADC ATP Chl DW F(0) F(m) F(v) FW mehr... HPLC LHCII Light-harvesting complex II Lut N NPQ ODC Osmotic stress PAM PAR PEG PSI PSII Photosynthesis Plant water-relations Put Putrescine RWC SE SPDS Spm TW UV V Z adenosine-5′-triphosphate antheraxanthin arginine decarboxylase chlorophyll dry weight electric component of transthylakoid proton motive force fresh weight high-performance liquid chromatography lutein maximum fluorescence value minimum fluorescence value neoxanthin non photochemical quenching ornithine decarboxylase osmotic component of transthylakoid proton motive force photosynthetically active radiation photosystem I photosytem II polyethylene-glycol pulse amplitude fluorometry putrescine relative water content spermidine synthase spermine standard error turgid weight ultraviolet variable fluorescence value violaxanthin zeaxanthin ΔpH Δψ Water 059QF0KO0R Chlorophyll 1406-65-1 Polyethylene Glycols 3WJQ0SDW1A V10TVZ52E4

Beschreibung
Zusammenfassung:	Copyright © 2013 Elsevier GmbH. All rights reserved. During the last decade we showed clearly that abiotic stress changes the cellular composition of polyamines, which in turn regulate the photochemical and non-photochemical quenching of the received light energy in the photosynthetic apparatus and that modulate substantially the level of plant tolerance. In the present contribution, we tried to change the bioenergetics of the leaf discs before the exposure to osmotic stress only by exogenously supplied putrescine, in order to enhance quickly the tolerance against the abiotic stress. Tobacco leaf discs treated with polyethylene-glycol reduced their water content about 24% within 1h. This relatively mild osmotic stress increased endogenous putrescine about 83% and decreased maximum photosystem II photochemical efficiency about 14%. In line with this, here we show that treatment with 1mM exogenous putrescine 1h before polyethylene-glycol addition protects the photochemical capacity and inhibits loss of water, confirming the key role of putrescine in the modulation of plant tolerance against osmotic stress. Furthermore, our recent works indicate that putrescine is accumulated in lumen during light reactions and may act as a permeable buffer and an osmolyte
Beschreibung:	Date Completed 02.09.2014 Date Revised 13.12.2023 published: Print-Electronic Citation Status MEDLINE
ISSN:	1618-1328
DOI:	10.1016/j.jplph.2013.09.015