Abstract
Blue (400–500 nm) and red (600–700 nm) light regions have been investigated for their effects on photosynthesis and plant growth, yet evidence for specific blue light wavelengths in plant research is lacking. Investigations into amber (595 nm) light are similarly limited. To ‘shed light’ on these two important wavelengths, this study investigated the combined effects of blue and amber light on plant growth and development in two model plants: tomato (Solanum lycopersicum cv. Beefsteak) and lettuce (Lactuca sativa cv. Breen). Plant growth responses were determined with four light treatments: B+BA (blue + broad amber, 455–602 nm), RB-NA (royal blue + narrow amber, 430–602 nm), RB-BA (royal blue + broad amber, 423–595 nm), and high-pressure sodium at a PPFD of 250 µmol m−2 s−1. After 21 days, the highest fresh and dry mass for both plant species was obtained under the RB-BA light treatment. Shifting the blue wavelength from 430 nm to 455 nm with broad amber lighting led to 40% less fresh mass for tomatoes, whereas only an approximate 5% reduction in fresh mass was observed for lettuce plants. Our findings demonstrate that an alternate and combined blue + amber light spectrum is effective for optimizing plant productivity.
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Claims 4
Claim · model-written summary
RB-BA lighting produced the highest fresh and dry mass for tomato after 21 days.
- Taxon
- tomato
Solanum lycopersicume1 - Material
- Solanum lycopersicum cv. Beefsteake1
- Treatment
- RB-BA light treatmente0
- Outcome
- fresh and dry masse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 21 days, the highest fresh and dry mass for both plant species was obtained under the RB-BA light treatment.”
e1“tomato (Solanum lycopersicum cv. Beefsteak) and lettuce (Lactuca sativa cv. Breen)”
Claim · model-written summary
RB-BA lighting produced the highest fresh and dry mass for lettuce after 21 days.
- Taxon
- lettuce
Lactuca sativae1 - Material
- Lactuca sativa cv. Breene1
- Treatment
- RB-BA light treatmente0
- Outcome
- fresh and dry masse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 21 days, the highest fresh and dry mass for both plant species was obtained under the RB-BA light treatment.”
e1“tomato (Solanum lycopersicum cv. Beefsteak) and lettuce (Lactuca sativa cv. Breen)”
Claim · model-written summary
Shifting blue light from 430 to 455 nm with broad amber reduced tomato fresh mass by 40%.
- Taxon
- tomatoesSolanum lycopersicume0
- Treatment
- 455 nm with broad amber lightinge0
- Outcome
- fresh masse0
- Direction
- lesse0
- Value
- 40%e0
- Comparator
- 430 nme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shifting the blue wavelength from 430 nm to 455 nm with broad amber lighting led to 40% less fresh mass for tomatoes”
Claim · model-written summary
The same wavelength shift reduced lettuce fresh mass by approximately 5%.
- Taxon
- lettuceLactuca sativae0
- Treatment
- 455 nm with broad amber lightinge0
- Outcome
- fresh masse0
- Direction
- reductione0
- Value
- approximate 5%e0
- Comparator
- 430 nme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shifting the blue wavelength from 430 nm to 455 nm with broad amber lighting led to 40% less fresh mass for tomatoes, whereas only an approximate 5% reduction in fresh mass was observed for lettuce plants.”
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light · growth · Solanum lycopersicum (tomato)Positive and negative results
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See all 226 papers →light · growth · Lactuca sativa (garden lettuce)Positive and negative results
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See all 300 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.