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Cited by 168Light effects on plantsPhotosynthetic Processes and MechanismsPlant Gene Expression Analysis

Predawn and high intensity application of supplemental blue light decreases the quantum yield of PSII and enhances the amount of phenolic acids, flavonoids, and pigments in Lactuca sativa

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Ouzounis, Theoharis, Razi Parjikolaei, Behnaz, Fretté, Xavier, Rosenqvist, Eva, Ottosen, Carl-Otto·2015·Frontiers in Plant Science
DOI 10.3389/fpls.2015.00019PMC PMC4341431
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Abstract

To evaluate the effect of blue light intensity and timing, two cultivars of lettuce [Lactuca sativa cv. "Batavia" (green) and cv. "Lollo Rossa" (red)] were grown in a greenhouse compartment in late winter under natural light and supplemental high pressure sodium (SON-T) lamps yielding 90 (±10) μmol m(-2) s(-1) for up to 20 h, but never between 17:00 and 21:00. The temperature in the greenhouse compartments was 22/11°C day/night, respectively. The five light-emitting diode (LED) light treatments were Control (no blue addition), 1B 06-08 (Blue light at 45 μmol m(-2) s(-1) from 06:00 to 08:00), 1B 21-08 (Blue light at 45 μmol m(-2) s(-1) from 21:00 to 08:00), 2B 17-19 (Blue at 80 μmol m(-2) s(-1) from 17:00 to 19:00), and 1B 17-19 (Blue at 45 μmol m(-2) s(-1) from 17:00 to 19:00). Total fresh and dry weight was not affected with additional blue light; however, plants treated with additional blue light were more compact. The stomatal conductance in the green lettuce cultivar was higher for all treatments with blue light compared to the Control. Photosynthetic yields measured with chlorophyll fluorescence showed different response between the cultivars; in red lettuce, the quantum yield of PSII decreased and the yield of non-photochemical quenching increased with increasing blue light, whereas in green lettuce no difference was observed. Quantification of secondary metabolites showed that all four treatments with additional blue light had higher amount of pigments, phenolic acids, and flavonoids compared to the Control. The effect was more prominent in red lettuce, highlighting that the results vary among treatments and compounds. Our results indicate that not only high light level triggers photoprotective heat dissipation in the plant, but also the specific spectral composition of the light itself at low intensities. However, these plant responses to light are cultivar dependent.

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Authors
Ouzounis, T., Razi Parjikolaei, B., Fretté, X., Rosenqvist, E., & Ottosen, C.-O.
Affiliations
  • University of Southern Denmark (DK)
  • University of Copenhagen (DK)
  • Aarhus University (DK)
Corresponding author
Ouzounis, Theoharis
ORCID
Venue
Frontiers in Plant Science
Publisher
Frontiers Media SA
Published
2015-02-26
Volume
6
Pages
19-19
ISSN
1664-462X (ISSN-L)
DOI
10.3389/fpls.2015.00019
PMC
PMC4341431
OpenAlex
W2063851335
Cited by
168
References
1
Citations by year
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FWCI
13.99
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Plant Science (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (publishedVersion, other-oa)
  • University of Southern Denmark Research Portal (University of Southern Denmark) (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • Energiteknologisk udviklings- og demonstrationsprogram
  • Interreg
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Light effects on plants
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant Gene Expression Analysis
Keywords
blue light, supplemental lighting, lettuce, photosystem II quantum yield, non-photochemical quenching, phenolic acids, flavonoids, carotenoids, secondary metabolites, stomatal conductance, cultivar differences, photoprotection, high-pressure sodium lamps, chlorophyll fluorescence, LED lighting

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