Abstract
In this study, effects of yellow (Y), purple (P), red (R), blue (B), green (G), and white (W) light on growth and development of tobacco plants were evaluated. We showed that monochromatic light reduced the growth, net photosynthetic rate (P N), stomatal conductance, intercellular CO2, and transpiration rate of tobacco. Such a reduction in P N occurred probably due to the stomatal limitation contrary to plants grown under W. Photochemical quenching coefficient (qP), maximal fluorescence of dark-adapted state, effective quantum yield of PSII photochemistry (ΦPSII), and maximal quantum yield of PSII photochemistry (Fv/Fm) of plants decreased under all monochromatic illuminations. The decline in ΦPSII occurred mostly due to the reduction in qP. The increase in minimal fluorescence of dark-adapted state and the decrease in Fv/Fm indicated the damage or inactivation of the reaction center of PSII under monochromatic light. Plants under Y and G showed the maximal nonphotochemical quenching with minimum P N compared with the W plants. Morphogenesis of plants was also affected by light quality. Under B light, plants exhibited smaller angles between stem and petiole, and the whole plants showed a compact type, while the angles increased under Y, P, R, and G and the plants were of an unconsolidated style. The total soluble sugar content increased significantly under B. The reducing sugar content increased under B but decreased significantly under R and G compared with W. In conclusion, different monochromatic light quality inhibited plants growth by reducing the activity of photosynthetic apparatus in plants. R and B light were more effective to drive photosynthesis and promote the plant growth, while Y and G light showed an suppression effect on plants growth. LEDs could be used as optimal light resources for plant cultivation in a greenhouse.
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Claims 19
Claim · model-written summary
Monochromatic light reduced tobacco growth relative to white light.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- monochromatic lighte0
- Outcome
- growthe0
- Direction
- reducede0
- Comparator
- We1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“monochromatic light reduced the growth, net photosynthetic rate (P N), stomatal conductance, intercellular CO2, and transpiration rate of tobacco”
e1“contrary to plants grown under W”
Claim · model-written summary
Monochromatic light reduced tobacco net photosynthetic rate, stomatal conductance and intercellular CO2 relative to white light.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- monochromatic lighte0
- Outcome
- net photosynthetic rate (P N), stomatal conductance, intercellular CO2e0
- Direction
- reducede0
- Comparator
- We1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“monochromatic light reduced the growth, net photosynthetic rate (P N), stomatal conductance, intercellular CO2, and transpiration rate of tobacco”
e1“contrary to plants grown under W”
Claim · model-written summary
Monochromatic light reduced tobacco transpiration rate relative to white light.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- monochromatic lighte0
- Outcome
- transpiration ratee0
- Direction
- reducede0
- Comparator
- We1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“monochromatic light reduced the growth, net photosynthetic rate (P N), stomatal conductance, intercellular CO2, and transpiration rate of tobacco”
e1“contrary to plants grown under W”
Claim · model-written summary
The authors attribute the reduced tobacco net photosynthetic rate under monochromatic light probably to stomatal limitation.
- Taxon
- tobaccoNicotiana tabacume1
- Outcome
- reduction in P Ne0
- Qualifier
- stomatal limitatione0
- Comparator
- We0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Such a reduction in P N occurred probably due to the stomatal limitation contrary to plants grown under W”
e1“tobacco plants were evaluated”
Claim · model-written summary
All monochromatic illuminations decreased tobacco photochemical quenching coefficient, maximal dark-adapted fluorescence and effective PSII quantum yield.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- all monochromatic illuminationse0
- Outcome
- Photochemical quenching coefficient (qP), maximal fluorescence of dark-adapted state, effective quantum yield of PSII photochemistry (ΦPSII)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photochemical quenching coefficient (qP), maximal fluorescence of dark-adapted state, effective quantum yield of PSII photochemistry (ΦPSII), and maximal quantum yield of PSII photochemistry (Fv/Fm) of plants decreased under all monochromatic illuminations”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
All monochromatic illuminations decreased tobacco maximal PSII photochemistry quantum yield.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- all monochromatic illuminationse0
- Outcome
- maximal quantum yield of PSII photochemistry (Fv/Fm)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximal quantum yield of PSII photochemistry (Fv/Fm) of plants decreased under all monochromatic illuminations”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
The authors attribute the fall in tobacco ΦPSII mostly to reduced qP.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- decline in ΦPSIIe0
- Qualifier
- reduction in qPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decline in ΦPSII occurred mostly due to the reduction in qP”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
Increased minimal dark-adapted fluorescence and decreased Fv/Fm indicated PSII reaction-center damage or inactivation under monochromatic light.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- monochromatic lighte0
- Outcome
- damage or inactivation of the reaction center of PSIIe0
- Qualifier
- increase in minimal fluorescence of dark-adapted state and the decrease in Fv/Fme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in minimal fluorescence of dark-adapted state and the decrease in Fv/Fm indicated the damage or inactivation of the reaction center of PSII under monochromatic light”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
Yellow and green light produced maximal tobacco nonphotochemical quenching relative to white light.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Y and Ge0
- Outcome
- nonphotochemical quenchinge0
- Direction
- maximale0
- Comparator
- We0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants under Y and G showed the maximal nonphotochemical quenching with minimum P N compared with the W plants”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
Yellow and green light produced minimum tobacco net photosynthetic rate relative to white light.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants under Y and G showed the maximal nonphotochemical quenching with minimum P N compared with the W plants”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
Blue light made tobacco stem-petiole angles smaller and whole plants compact.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- B lighte0
- Outcome
- angles between stem and petiolee0
- Direction
- smallere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under B light, plants exhibited smaller angles between stem and petiole, and the whole plants showed a compact type”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
Yellow, purple, red and green light increased tobacco stem-petiole angles and produced an unconsolidated plant form.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Y, P, R, and Ge0
- Outcome
- anglese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the angles increased under Y, P, R, and G and the plants were of an unconsolidated style”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
Blue light significantly increased tobacco total soluble sugar content.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Be0
- Outcome
- total soluble sugar contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total soluble sugar content increased significantly under B”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
Blue light increased tobacco reducing sugar content relative to white light.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Be0
- Outcome
- reducing sugar contente0
- Direction
- increasede0
- Comparator
- We0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reducing sugar content increased under B but decreased significantly under R and G compared with W”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
Red and green light significantly decreased tobacco reducing sugar content relative to white light.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- R and Ge0
- Outcome
- reducing sugar contente0
- Direction
- decreasede0
- Comparator
- We0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reducing sugar content increased under B but decreased significantly under R and G compared with W”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
The authors concluded that monochromatic light inhibited tobacco growth through reduced photosynthetic-apparatus activity.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- different monochromatic light qualitye0
- Outcome
- plants growthe0
- Qualifier
- reducing the activity of photosynthetic apparatuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“different monochromatic light quality inhibited plants growth by reducing the activity of photosynthetic apparatus in plants”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
The authors found red and blue light more effective for driving photosynthesis and promoting tobacco growth.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- R and B lighte0
- Outcome
- photosynthesis and promote the plant growthe0
- Direction
- more effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“R and B light were more effective to drive photosynthesis and promote the plant growth”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
The authors found yellow and green light suppressed tobacco growth.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Y and G lighte0
- Outcome
- plants growthe0
- Direction
- suppressione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Y and G light showed an suppression effect on plants growth”
t0“tobacco (Nicotiana tabacum L.) plants”
Claim · model-written summary
The authors propose LEDs as light sources for greenhouse cultivation of tobacco.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- LEDs could be used as optimal light resources for plant cultivation in a greenhousee0
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LEDs could be used as optimal light resources for plant cultivation in a greenhouse”
t0“tobacco (Nicotiana tabacum L.) plants”
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See all 47 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.