Concentration of hinokinin, phenolic acids and flavonols in leaves and stems of Hydrocotyle leucocephala is differently influenced by PAR and ecologically relevant UV-B level

Copyright © 2014 Elsevier GmbH. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Journal of plant physiology. - 1979. - 173(2015) vom: 15. Jan., Seite 105-15
1. Verfasser: Müller, Viola (VerfasserIn)
Weitere Verfasser: Lankes, Christa, Albert, Andreas, Winkler, J Barbro, Zimmermann, Benno F, Noga, Georg, Hunsche, Mauricio
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Journal of plant physiology
Schlagworte:Journal Article Light intensity Lignans Oxidative stress Phenylpropanoids Spectral quality Benzodioxoles Flavonols Hydroxybenzoates Kaempferols mehr... Propanols 1-phenylpropanol 0F897O3O4M hinokinin 26543-89-5 Chlorogenic Acid 318ADP12RI kaempferol 731P2LE49E Quercetin 9IKM0I5T1E phenolic acid I3P9R8317T 4-Butyrolactone OL659KIY4X
Beschreibung
Zusammenfassung:Copyright © 2014 Elsevier GmbH. All rights reserved.
We examined the effects of ambient, non-stressing ultraviolet (UV)-B (280-315nm) level combined with different intensities of photosynthetic active radiation (PAR, 400-700nm) on the accumulation of the lignan (-)-hinokinin, in leaves and stems of Hydrocotyle leucocephala. Plants were exposed in sun simulators under almost natural irradiance and climatic conditions to one of four light regimes, i.e. two PAR intensities (906 and 516μmolm(-2)s(-1)) including or excluding UV-B radiation (0 and 0.4Wm(-2)). Besides hinokinin, we identified three chlorogenic acid isomers, one other phenolic acid, 12 quercetin, and five kaempferol derivatives in the H. leucocephala extracts. Hinokinin was most abundant in the stems, and its accumulation was slightly enhanced under UV-B exposure. We therefore assume that hinokinin contributes to cell wall stabilization and consequently to a higher resistance of the plant to environmental factors. Quercetin derivatives increasingly accumulated under UV-B and high PAR exposure at the expense of kaempferols and chlorogenic acids, which was apparently related to its ability to scavenge reactive oxygen species. In general, the concentration of the constituents depended on the plant organ, the leaf age, the light regimes, and the duration of exposure. The distribution pattern of the compounds within the examined organs was not influenced by the treatments. Based on the chemical composition of the extracts a principal component analysis (PCA) enabled a clear separation of the plant organs and harvesting dates. Younger leaves mostly contained higher phenylpropanoid concentrations than older leaves. Nevertheless, more pronounced effects of the light regimes were detected in older leaves. As assessed, in many cases the individual compounds responded differently to the PAR/UV-B combinations, even within the same phenylpropanoid class. Since this is the first report on the influence of light conditions on the accumulation of lignans in herbaceous plants, it opens many perspectives for a more precise elucidation of all involved biochemical and molecular processes
Beschreibung:Date Completed 14.02.2017
Date Revised 30.09.2020
published: Print-Electronic
Citation Status MEDLINE
ISSN:1618-1328
DOI:10.1016/j.jplph.2014.09.003