Abstract
High-pressure sodium (HPS) lighting is increasingly replaced by LED lighting in lettuce greenhouse cultivation. In contrast to HPS lighting, LEDs do not heat radiation. Therefore, the leaf temperature is significantly lower under LEDs. This raises the question of whether LED lighting has a positive impact on the reduction in water consumption during lettuce production. In this paper, we investigated this question and found that the water consumption of lettuce produced under LEDs was significantly lower (−15%) than under HPS without loss of yield. We also found that supplementary lighting increases the concentrations of caffeoylquinic acid, dicaffeoyltartaric acid, dicaffeoylquinic acid and that of the total phenolic compounds in lettuce leaves by 61%, 39%, 163% and 38%, respectively. Only the LED fixture was also efficient enough to increase the concentration of caffeoyltartaric acid (+24%). Most of the phenolic compounds showed a very strong positive correlation with the chlorophyll concentration in lettuce, which predominated in the leaves exposed to the LED lighting. Based on these facts, we conclude that by optimizing the light composition, more sustainable plant production, higher concentrations of chlorophyll and some phenolic compounds are possible.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
LED lighting reduced lettuce water consumption by 15% relative to HPS.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- LEDse0
- Outcome
- water consumptione0
- Direction
- lowere0
- Value
- −15%e0
- Comparator
- HPSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the water consumption of lettuce produced under LEDs was significantly lower (−15%) than under HPS”
Claim · model-written summary
LED lighting did not reduce lettuce yield relative to HPS.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce produced under LEDs was significantly lower (−15%) than under HPS without loss of yield”
Claim · model-written summary
Supplementary lighting increased caffeoylquinic acid concentration in lettuce leaves by 61%.
- Taxon
- lettuceLactuca sativae0
- Treatment
- supplementary lightinge0
- Outcome
- concentrations of caffeoylquinic acide0
- Direction
- increasese0
- Value
- 61%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supplementary lighting increases the concentrations of caffeoylquinic acid, dicaffeoyltartaric acid, dicaffeoylquinic acid and that of the total phenolic compounds in lettuce leaves by 61%, 39%, 163% and 38%, respectively”
Claim · model-written summary
Supplementary lighting increased dicaffeoyltartaric acid concentration in lettuce leaves by 39%.
- Taxon
- lettuceLactuca sativae0
- Treatment
- supplementary lightinge0
- Outcome
- dicaffeoyltartaric acide0
- Direction
- increasese0
- Value
- 39%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supplementary lighting increases the concentrations of caffeoylquinic acid, dicaffeoyltartaric acid, dicaffeoylquinic acid and that of the total phenolic compounds in lettuce leaves by 61%, 39%, 163% and 38%, respectively”
Claim · model-written summary
Supplementary lighting increased dicaffeoylquinic acid concentration in lettuce leaves by 163%.
- Taxon
- lettuceLactuca sativae0
- Treatment
- supplementary lightinge0
- Outcome
- dicaffeoylquinic acide0
- Direction
- increasese0
- Value
- 163%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supplementary lighting increases the concentrations of caffeoylquinic acid, dicaffeoyltartaric acid, dicaffeoylquinic acid and that of the total phenolic compounds in lettuce leaves by 61%, 39%, 163% and 38%, respectively”
Claim · model-written summary
Supplementary lighting increased total phenolic compounds in lettuce leaves by 38%.
- Taxon
- lettuceLactuca sativae0
- Treatment
- supplementary lightinge0
- Outcome
- total phenolic compoundse0
- Direction
- increasese0
- Value
- 38%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supplementary lighting increases the concentrations of caffeoylquinic acid, dicaffeoyltartaric acid, dicaffeoylquinic acid and that of the total phenolic compounds in lettuce leaves by 61%, 39%, 163% and 38%, respectively”
Claim · model-written summary
LED lighting increased caffeoyltartaric acid concentration by 24%.
- Taxon
- LettuceLactuca sativat0
- Treatment
- LED fixturee0
- Outcome
- concentration of caffeoyltartaric acide0
- Direction
- increasee0
- Value
- +24%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only the LED fixture was also efficient enough to increase the concentration of caffeoyltartaric acid (+24%).”
t0“Lettuce Greenhouse Production”
Claim · model-written summary
Most phenolic compounds correlated positively with chlorophyll concentration in lettuce.
- Taxon
- lettuceLactuca sativae0
- Compound
- chlorophylle0
- Outcome
- phenolic compoundse0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most of the phenolic compounds showed a very strong positive correlation with the chlorophyll concentration in lettuce”
The same questions in other papers
light · physiology: water · Lactuca sativa (garden lettuce)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
2 papers more in this group
See all 6 papers →light · quality: phytochemicals · Lactuca sativa (garden lettuce)Positive and negative results
42 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
47 papers more in this group
See all 51 papers →light · molecular: metabolites · Lactuca sativa (garden lettuce)Positive and negative results
41 papers in the same direction as this paper · 9 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
48 papers more in this group
See all 52 papers →light · yield · Lactuca sativa (garden lettuce)Positive and negative results
17 papers in the same direction as this paper · 53 reporting no difference from an alternative
- positive
- positive
- positive
67 papers more in this group
See all 71 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.