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

Frontiers in Plant Science
Theoharis OuzounisCarl-Otto Ottosen

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-photoch...Continue Reading

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May 28, 2014·Journal of Experimental Botany·Habtamu GidayCarl-Otto Ottosen
Aug 12, 2014·Journal of Plant Physiology·Theoharis OuzounisCarl-Otto Ottosen

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Citations

Sep 17, 2016·Food and Energy Security·Dionysios TouliatosMartin McAinsh
Jun 18, 2017·Journal of Agricultural and Food Chemistry·Viktorija VaštakaitėPavelas Duchovskis
Oct 6, 2017·Environmental Science and Pollution Research International·Muzammal RehmanLijun Liu
May 12, 2020·Frontiers in Plant Science·Felix ThomaGörge Deerberg
Nov 12, 2019·Frontiers in Plant Science·Cristian SilvestriValerio Cristofori
Apr 20, 2019·Frontiers in Plant Science·Samuel Eichhorn BilodeauMark Lefsrud
Jan 12, 2021·Frontiers in Plant Science·Dorthe H LarsenLeo F M Marcelis
Jan 21, 2021·Frontiers in Plant Science·Carolina Falcato Fialho PalmaÅke Strid
Jan 6, 2021·Critical Reviews in Food Science and Nutrition·Antonio J Meléndez-MartínezNora O'Brien
Mar 9, 2021·Frontiers in Plant Science·Laura CammarisanoPaul R H Robson
Sep 13, 2021·Physiologia Plantarum·Carolina Falcato Fialho PalmaLuis Orlando Morales

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