Abstract
Photosynthetic active radiation (PAR) refers to photons between 400 and 700 nm. These photons drive photosynthesis, providing carbohydrates for plant metabolism and development. Far-red radiation (FR, 701–750 nm) is excluded in this definition because no FR is absorbed by the plant photosynthetic pigments. However, including FR in the light spectrum provides substantial benefits for biomass production and resource-use efficiency. We investigated the effects of continuous FR addition and end-of-day additional FR to a broad white light spectrum (BW) on carbohydrate concentrations in the top and bottom leaves of sweet basil (Ocimum basilicum L.), a species that produces the raffinose family oligosaccharides raffinose and stachyose and preferentially uses the latter as transport sugar. Glucose, fructose, sucrose, raffinose, and starch concentrations increased significantly in top and bottom leaves with the addition of FR light. The increased carbohydrate pools under FR light treatments are associated with more efficient stachyose production and potentially improved phloem loading through increased sucrose homeostasis in intermediary cells. The combination of a high biomass yield, increased resource-use efficiency, and increased carbohydrate concentration in leaves in response to the addition of FR light offers opportunities for commercial plant production in controlled growth environments.
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Claims 4
Claim · model-written summary
Far-red light significantly increased glucose, fructose, and sucrose concentrations in top and bottom sweet basil leaves.
- Taxon
- sweet basil
Ocimum basilicume1 - Organ / stage
- top and bottom leavese0
- Treatment
- addition of FR lighte0
- Outcome
- Glucose, fructose, sucrosee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glucose, fructose, sucrose, raffinose, and starch concentrations increased significantly in top and bottom leaves with the addition of FR light”
e1“sweet basil (Ocimum basilicum L.)”
Claim · model-written summary
Far-red light significantly increased raffinose and starch concentrations in top and bottom sweet basil leaves.
- Taxon
- sweet basilOcimum basilicume1
- Organ / stage
- top and bottom leavese0
- Treatment
- addition of FR lighte0
- Outcome
- raffinose, and starch concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glucose, fructose, sucrose, raffinose, and starch concentrations increased significantly in top and bottom leaves with the addition of FR light”
e1“sweet basil (Ocimum basilicum L.)”
Claim · model-written summary
The authors associate larger carbohydrate pools under far-red treatments with more efficient stachyose production and potentially improved phloem loading.
- Taxon
- sweet basilOcimum basilicume1
- Treatment
- FR light treatmentse0
- Outcome
- stachyose production and potentially improved phloem loadinge0
- Direction
- more efficiente0
- Qualifier
- through increased sucrose homeostasis in intermediary cellse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increased carbohydrate pools under FR light treatments are associated with more efficient stachyose production and potentially improved phloem loading through increased sucrose homeostasis in intermediary cells.”
e1“sweet basil (Ocimum basilicum L.)”
Claim · model-written summary
The authors present far-red addition as an opportunity for commercial production in controlled growth environments.
- Taxon
- sweet basilOcimum basilicume1
- Treatment
- addition of FR lighte0
- Outcome
- opportunities for commercial plant production in controlled growth environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combination of a high biomass yield, increased resource-use efficiency, and increased carbohydrate concentration in leaves in response to the addition of FR light offers opportunities for commercial plant production in controlled growth environments.”
e1“sweet basil (Ocimum basilicum L.)”
The same questions in other papers
light · molecular: metabolites · Ocimum basilicum (basil)Positive and negative results
19 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- no effect
21 papers more in this group
See all 25 papers →light · quality: sugar starch · Ocimum basilicum (basil)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.