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ARS Home » Pacific West Area » Salinas, California » Crop Improvement and Protection Research » Research » Publications at this Location » Publication #363984
Research Project: Genetics and Breeding of Lettuce, Spinach, Melon, and Related Species to Improve Production and Consumer-related Traits

Location: Crop Improvement and Protection Research

Title: Phenolics composition in lettuce upon ultraviolet radiation and temperature effects

Author
item SYTAR, O - Slovak University Of Agriculture
item ZIVCAK, M - Slovak University Of Agriculture
item BRESTIC, M - Slovak University Of Agriculture
item RAUH, C - Technical University Of Berlin
item Simko, Ivan

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/21/2019
Publication Date: 4/1/2019
Citation: Sytar, O., Zivcak, M., Brestic, M., Rauh, C., Simko, I. 2019. Phenolics composition in lettuce upon ultraviolet radiation and temperature effects. Alps-Adria Scientific Workshop, April 1-6, 2019, Rimini, Italy.

Interpretive Summary:

Technical Abstract: The accumulation of secondary metabolites in plants depends on both external (environmental) and internal (biological) factors. Although, the variation observed among cultivars is generally considered to be more important than environmental e'ects. We have previously demonstrated that fast, 'uorescence record analyzed by the 'uorescence excitation ratio method can e'ciently determine environmentally induced changes in the content of 'avonoids and anthocyanins in lettuce leaves with di'erent colors. The comparison of the effects of UV radiation and temperature (indoor-outdoor effect) indicated that the level of UV radiation plays a dominant role in the accumulation of flavonoids, anthocyanins, and methoxycinnamic acid; while temperature predominantly influences the accumulation of phenolic acids (rosmarinic, p-anisic, vanillic acid. Although, the leaf color (green vs. red) was strongly related to the content of majority of studied phytochemicals, environmental conditions affected their concentrations in both color types similarly. The concentrations of compounds estimated with the noninvasive, fluorescence excitation ratio method was highly consistent with those obtained by standard analytical approaches. Our results show that this fast, non-invasive method can be effectively used for determining concentrations of flavonoids and phenolic acids in lettuce plants.