Abstract
Light is a crucial element for plant growth and production. High-pressure sodium (HPS) lamps are considered not very electrically efficient as they generate high radiant heat, and as a consequence, there has been a lot of interest in replacing HPS lamps with new more efficient lighting sources in the form of light-emitting diodes (LEDs). LEDs have a linear photon output with the electrical input current, and this great feature allows the design of lighting arrays that match the plant’s needs. In the current study, light spectrum absorbance of pigments extracted from 14 plant species was analyzed. Two absorbance peaks were observed in the Photosynthetically Active Radiation (PAR) region: one at 435 nm and the other at 665 nm. The light spectrum array was designed to produce the spectrum absorbed by basil pigments. This included the use of new wavelengths of 435 ± 5 nm to cover the blue region. Moreover, the ratio between blue and red was considered to match the absorbance of basil pigment. The use of a light spectrum that matches the plant absorbance significantly improved the investigated physiological parameters and increased the growth yield of basil. Moreover, this is the first to confirm the great positive impact of using 435 nm light spectrum in comparison with the commercially widely used 450 nm LED spectrum. This investigation has great scientific and commercial applications in the field of indoor faming and plant factory systems.
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Claims 4
Claim · model-written summary
Extracted pigments showed absorbance peaks at 435 nm and 665 nm.
Not reportedTaxon
Verbatim
e0“Two absorbance peaks were observed in the Photosynthetically Active Radiation (PAR) region: one at 435 nm and the other at 665 nm”
Claim · model-written summary
A matching light spectrum significantly improved physiological parameters.
- Taxon
- Sweet Basil
Ocimum basilicumt0 - Treatment
- light spectrum that matches the plant absorbancee0
- Outcome
- physiological parameterse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of a light spectrum that matches the plant absorbance significantly improved the investigated physiological parameters and increased the growth yield of basil”
t0“Sweet Basil”
Claim · model-written summary
A matching light spectrum increased basil growth yield.
- Taxon
- Sweet BasilOcimum basilicumt0
- Treatment
- light spectrum that matches the plant absorbancee0
- Outcome
- growth yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of a light spectrum that matches the plant absorbance significantly improved the investigated physiological parameters and increased the growth yield of basil”
t0“Sweet Basil”
Claim · model-written summary
435 nm light had a positive impact compared with the commercial 450 nm LED spectrum.
- Taxon
- Sweet BasilOcimum basilicumt0
- Treatment
- 435 nm light spectrume0
- Outcome
- positive impacte0
- Direction
- positivee0
- Comparator
- 450 nm LED spectrume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“great positive impact of using 435 nm light spectrum in comparison with the commercially widely used 450 nm LED spectrum”
t0“Sweet Basil”
The same questions in other papers
light · yield · Ocimum basilicum (basil)Positive and negative results
14 papers in the same direction as this paper · 8 in the opposite direction
- no effect
- positive
- no effect
19 papers more in this group
See all 23 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.