CO2 enrichment can produce high red leaf lettuce yield while increasing most flavonoid glycoside and some caffeic acid derivative concentrations

Food Chemistry
Christine Becker, Hans-Peter Kläring

Abstract

Carbon dioxide (CO2) enrichment is a common practice in greenhouses to increase crop yields up to 30%. Yet, reports on the effect on foliar phenolic compounds vary. We studied the effect on two red leaf lettuce cultivars, grown for 25days in growth chambers at CO2 concentrations of 200 or 1000ppm, with some plants exchanged between treatments after 11days. As expected, head mass increased with higher CO2 concentration. Regression analysis, corrected for head mass, showed increased concentrations of most flavonoid glycosides at high CO2 concentrations while only some caffeic acid derivatives were increased, and not uniformly in both cultivars. Sugar concentrations increased with CO2 concentration. Generally, conditions in the 10days before harvest determined concentrations. We suspect that phenolic compounds were mainly accumulated because plenty of precursors were available. The results indicate that CO2 enrichment can result in high yields of red leaf lettuce rich in phenolic compounds.

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Citations

Jun 20, 2016·Journal of Plant Physiology·Devrim CoskunHerbert J Kronzucker
Aug 31, 2018·Frontiers in Plant Science·Jinlong DongZengqiang Duan
Feb 6, 2020·Environmental Research Letters : ERL [Web Site]·Carmelia Alae-CarewPauline F D Scheelbeek
Jan 22, 2021·Journal of the Science of Food and Agriculture·Sopanat SawatdeeAdrian E Flood

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