Abstract
Abstract Due to progress in the industrial development of light-emitting diodes (LEDs), much work has been dedicated to understanding the reaction of plants to these light sources in recent years. In this study, the effect of different LED-based light regimes on growth and performance of passion fruit ( Passiflora edulis ) seedlings was investigated. Combinations of different light irradiances (50, 100, and 200 µmol m −2 s −1 ), quality (red, green, and blue light-emitting LEDs), and photoperiods (10 h/14 h, 12 h/12 h and 14 h/10 h light/dark cycles) were used to investigate the photosynthetic pigment contents, antioxidants and growth traits of passion fruit seedlings in comparison to the same treatment white fluorescent light. Light irradiance of 100 µmol m −2 s −1 of a 30% red/70% blue LED light combination and 12 h/12 h light/dark cycles showed the best results for plant height, stem diameter, number of leaves, internode distance, and fresh/dry shoot/root weights. 14 h/10 h light/dark cycles with the same LED light combination promoted antioxidant enzyme activities and the accumulation of phenols and flavonoids. In contrast, lower light irradiance (50 µmol m −2 s −1 ) had negative effects on most of the parameters. We conclude that passion fruit seedlings' optimal performance and biomass production requires long and high light irradiances with a high blue light portion.
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Claims 5
Claim · model-written summary
The 100 µmol m −2 s −1, 30% red/70% blue LED and 12 h/12 h cycle gave the best seedling height, stem diameter and leaf number.
- Taxon
- Passiflora edulis
Passiflora edulist0 - Organ / stage
- seedlingse1
- Treatment
- 100 µmol m −2 s −1 of a 30% red/70% blue LED light combination and 12 h/12 h light/dark cyclese0
- Outcome
- plant height, stem diameter, number of leavese0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Light irradiance of 100 µmol m −2 s −1 of a 30% red/70% blue LED light combination and 12 h/12 h light/dark cycles showed the best results for plant height, stem diameter, number of leaves, internode distance, and fresh/dry shoot/root weights.”
e1“passion fruit seedlings' optimal performance and biomass production requires long and high light irradiances with a high blue light portion”
t0“Passion fruit (Passiflora edulis)”
Claim · model-written summary
The same LED regime gave the best internode distance and fresh and dry shoot and root weights.
- Taxon
- Passiflora edulisPassiflora edulist0
- Treatment
- 100 µmol m −2 s −1 of a 30% red/70% blue LED light combination and 12 h/12 h light/dark cyclese0
- Outcome
- internode distance, and fresh/dry shoot/root weightse0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Light irradiance of 100 µmol m −2 s −1 of a 30% red/70% blue LED light combination and 12 h/12 h light/dark cycles showed the best results for plant height, stem diameter, number of leaves, internode distance, and fresh/dry shoot/root weights.”
t0“Passion fruit (Passiflora edulis)”
Claim · model-written summary
The 14 h/10 h cycle with the same LED combination promoted antioxidant enzyme activities and phenol and flavonoid accumulation.
- Taxon
- Passiflora edulisPassiflora edulist0
- Treatment
- 14 h/10 h light/dark cycles with the same LED light combinatione0
- Outcome
- antioxidant enzyme activities and the accumulation of phenols and flavonoidse0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“14 h/10 h light/dark cycles with the same LED light combination promoted antioxidant enzyme activities and the accumulation of phenols and flavonoids.”
t0“Passion fruit (Passiflora edulis)”
Claim · model-written summary
The lower 50 µmol m −2 s −1 irradiance negatively affected most measured seedling parameters.
- Taxon
- Passiflora edulisPassiflora edulist0
- Treatment
- lower light irradiance (50 µmol m −2 s −1 )e0
- Outcome
- most of the parameterse0
- Direction
- negative effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower light irradiance (50 µmol m −2 s −1 ) had negative effects on most of the parameters.”
t0“Passion fruit (Passiflora edulis)”
Claim · model-written summary
The authors conclude that optimal passion fruit seedling performance and biomass require long, high-irradiance light with a high blue proportion.
- Taxon
- passion fruitPassiflora edulise0
- Treatment
- long and high light irradiances with a high blue light portione0
- Outcome
- optimal performance and biomass productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“passion fruit seedlings' optimal performance and biomass production requires long and high light irradiances with a high blue light portion”
The same questions in other papers
light · growth · Passiflora edulis (passion fruit)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
3 papers more in this group
See all 7 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.