University of Oulu

K. Taulavuori, A. Pyysalo, E. Taulavuori, R. Julkunen-Tiitto, Responses of phenolic acid and flavonoid synthesis to blue and blue-violet light depends on plant species, Environmental and Experimental Botany, Volume 150, 2018, Pages 183-187, ISSN 0098-8472,

Responses of phenolic acid and flavonoid synthesis to blue and blue-violet light depends on plant species

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Author: Taulavuori, K.1; Pyysalo, A.1; Taulavuori, E.1;
Organizations: 1Department of Ecology and Genetics, University of Oulu, PO Box 8000, FIN 90014, Oulu, Finland
2Department of Biology, University of Eastern Finland, PO Box 111, FIN 80101, Joensuu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.6 MB)
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Language: English
Published: Elsevier, 2018
Publish Date: 2020-03-19


Three common culinary herbs were studied in order to find out how manipulation of blue range of wavelength spectrum affects plant growth and chemistry. The studied species were basil (Ocimum basilicum), arugula (Eruca sativa) and bloody dock (Rumex sanguineus). It was hypothesized that high-energy short wavelengths induce stress and further increase phytochemical production for light screening. The study was arranged in a greenhouse, where traditional high-pressure sodium lamps served as control treatment. The other two treatments were supplemental blue light (+B) (max. peak at 450 nm) and supplemental blue-violet (+BV) light (max. peaks at 420 and 440 nm). LED lights were used to produce these supplementations. Generally light treatments did not induce marked stress as evaluated by chlorophyll fluorescence ratio (Fv/Fm). However, all growth parameters (shoot elongation, leaf biomass, leaf number) tended to be highest in control treatment, except for leaf number in arugula. Phytochemical production of bloody dock was responsive to neither blue light treatments (+B and +BV). Instead of that, both blue light treatments increased production of phenolic acids in basil, and flavonoids in arugula. In arugula, +BV was even more efficient, indicating the role of flavonoids in protection against UV-A radiation in this species. The role of blue to red light ratio is discussed in relation to quantitative expression in phytochemical synthesis.

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Series: Environmental and experimental botany
ISSN: 0098-8472
ISSN-E: 1873-7307
ISSN-L: 0098-8472
Volume: 150
Pages: 183 - 187
DOI: 10.1016/j.envexpbot.2018.03.016
Type of Publication: A1 Journal article – refereed
Field of Science: 1181 Ecology, evolutionary biology
Funding: The project is funded by Academy of Finland, project n:o #278 364.
Academy of Finland Grant Number: 278364
Detailed Information: 278364 (Academy of Finland Funding decision)
Copyright information: © 2018 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license