Document Detail

LED illumination affects bioactive compounds in Romaine baby leaf lettuce.
MedLine Citation:
PMID:  23584932     Owner:  NLM     Status:  Publisher    
BACKGROUND: Light quality effect on phytochemicals in romaine baby leaf lettuce 'Thumper' investigated in closed-environment (I) and greenhouse (II, III) (16h; 21/17°C). (I): Basal (638, 455, 660 and 735nm) LEDs supplemented with UV (380nm), green (510nm), yellow (595nm), orange (622nm) LEDs, PPFD ~175 µmol m(-2) s(-1) . (II): High-pressure sodium (HPS; 90μmol·m(-2) s(-1) ) lighting supplemented with blue (455, 470nm) or green (505, 530nm) LEDs (30 µmol m(-2) s(-1) ). (III): At pre-harvest stage of 3 days, HPS lamps (90 µmol m(-2) s(-1) ) supplemented by red 638 nm LEDs (210 µmol m(-2) s(-1) ). RESULTS: (I) Supplemental UV, orange light enhanced contents of phenolic compounds, Basal+UV and basal+green light affected α-carotene; Basal+green - anthocyanin contents. All supplemental LED colors had negative effect on tocopherol, ascorbic acid contents. (II) HPS lighting supplemented by different LEDs were not efficient as increase in some compounds did not compensate the decrease in major tested phytochemicals content. (III) Short-term irradiation with supplemental 638 nm LEDs before harvesting in greenhouse did not have significant effect on phytochemical contents, except enhanced tocopherol contents. CONCLUSION: Wavelength control using LED technology affects production of secondary metabolites as metabolism of many nutrients is light-dependent. The narrow-band supplemental light effects were diminished by broader-spectrum HPS or natural daylight in greenhouse.
Giedrė Samuolienė; Aušra Brazaitytė; Ramūnas Sirtautas; Akvilė Viršilė; Jurga Sakalauskaitė; Sandra Sakalauskienė; Pavelas Duchovskis
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-4-12
Journal Detail:
Title:  Journal of the science of food and agriculture     Volume:  -     ISSN:  1097-0010     ISO Abbreviation:  J. Sci. Food Agric.     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-4-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376334     Medline TA:  J Sci Food Agric     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
This article is protected by copyright. All rights reserved.
Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kaunas str. 30, LT-54333, Babtai, Kaunas distr., Lithuania.
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