Abstract
We examined the effects of light quality on growth characteristics and porphyrin biosynthesis of rice seedlings grown under different wavelengths from light emitting diodes (LEDs). After 10 days of exposure to various wavelengths of LEDs, leaf area and shoot biomass were greater in seedlings grown under white and blue LEDs than those of green and red LEDs. Both green and red LED treatments drastically decreased levels of protoporphyrin IX (Proto IX) and Mg-porphyrins compared to those of white LED, while levels of Mg-Proto IX monomethyl ester and protochlorophyllide under blue LED were decreased by 21% and 49%, respectively. Transcript levels of PPO1 were greatly upregulated in seedlings grown under red LED compared to white LED, whereas transcript levels of HO2 and CHLD were upregulated under blue LED. Overall, most porphyrin biosynthetic genes in the Fe-porphyrin branch remained almost constant or upregulated, while most genes in the Mg-porphyrin branch were downregulated. Expression levels of nuclear-encoded photosynthetic genes Lhcb and RbcS noticeably decreased after exposure to blue and red LEDs, compared to white LED. Our study suggests that specific wavelengths of LED greatly influence characteristics of growth in plants partly through altering the metabolic regulation of the porphyrin biosynthetic pathway, and possibly contribute to affect retrograde signaling.
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Claims 10
Claim · model-written summary
Leaf area and shoot biomass of rice seedlings were greater under white and blue LEDs than under green and red LEDs.
- Taxon
- Rice Seedlings
Oryza sativat0 - Treatment
- white and blue LEDse0
- Outcome
- leaf area and shoot biomasse0
- Direction
- greatere0
- Comparator
- green and red LEDse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf area and shoot biomass were greater in seedlings grown under white and blue LEDs than those of green and red LEDs”
t0“Rice Seedlings”
Claim · model-written summary
Green and red LED treatments drastically decreased levels of protoporphyrin IX and Mg-porphyrins in rice seedlings compared with white LED.
- Taxon
- Rice SeedlingsOryza sativat0
- Treatment
- green and red LED treatmentse0
- Outcome
- levels of protoporphyrin IX (Proto IX) and Mg-porphyrinse0
- Direction
- decreasede0
- Comparator
- white LEDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both green and red LED treatments drastically decreased levels of protoporphyrin IX (Proto IX) and Mg-porphyrins compared to those of white LED”
t0“Rice Seedlings”
Claim · model-written summary
Mg-Proto IX monomethyl ester level in rice seedlings under blue LED was decreased by 21%.
- Taxon
- Rice SeedlingsOryza sativat0
- Treatment
- blue LEDe0
- Outcome
- levels of Mg-Proto IX monomethyl estere0
- Direction
- decreasede0
- Value
- 21%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“levels of Mg-Proto IX monomethyl ester and protochlorophyllide under blue LED were decreased by 21% and 49%, respectively”
t0“Rice Seedlings”
Claim · model-written summary
Protochlorophyllide level in rice seedlings under blue LED was decreased by 49%.
- Taxon
- Rice SeedlingsOryza sativat0
- Treatment
- blue LEDe0
- Compound
- protochlorophyllidee0
- Outcome
- levels ofe0
- Direction
- decreasede0
- Value
- 49%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“levels of Mg-Proto IX monomethyl ester and protochlorophyllide under blue LED were decreased by 21% and 49%, respectively”
t0“Rice Seedlings”
Claim · model-written summary
Transcript levels of PPO1 were greatly upregulated in rice seedlings under red LED compared with white LED.
- Taxon
- Rice SeedlingsOryza sativat0
- Treatment
- red LEDe0
- Gene
- PPO1e0
- Outcome
- Transcript levelse0
- Direction
- upregulatede0
- Comparator
- white LEDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transcript levels of PPO1 were greatly upregulated in seedlings grown under red LED compared to white LED”
t0“Rice Seedlings”
Claim · model-written summary
Transcript levels of HO2 and CHLD were upregulated in rice seedlings under blue LED.
- Taxon
- Rice SeedlingsOryza sativat0
- Treatment
- blue LEDe0
- Gene
- HO2 and CHLDe0
- Outcome
- transcript levelse0
- Direction
- upregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“transcript levels of HO2 and CHLD were upregulated under blue LED”
t0“Rice Seedlings”
Claim · model-written summary
Most porphyrin biosynthetic genes in the Fe-porphyrin branch remained almost constant or were upregulated in rice seedlings under the LED treatments.
- Taxon
- Rice SeedlingsOryza sativat0
- Outcome
- porphyrin biosynthetic genes in the Fe-porphyrin branche0
- Direction
- remained almost constant or upregulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most porphyrin biosynthetic genes in the Fe-porphyrin branch remained almost constant or upregulated”
t0“Rice Seedlings”
Claim · model-written summary
Most genes in the Mg-porphyrin branch were downregulated in rice seedlings under the LED treatments.
- Taxon
- Rice SeedlingsOryza sativat0
- Outcome
- genes in the Mg-porphyrin branche0
- Direction
- downregulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most genes in the Mg-porphyrin branch were downregulated”
t0“Rice Seedlings”
Claim · model-written summary
Expression of the nuclear-encoded photosynthetic genes Lhcb and RbcS noticeably decreased in rice seedlings after exposure to blue and red LEDs compared with white LED.
- Taxon
- Rice SeedlingsOryza sativat0
- Treatment
- blue and red LEDse0
- Gene
- Lhcb and RbcSe0
- Outcome
- Expression levelse0
- Direction
- decreasede0
- Comparator
- white LEDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Expression levels of nuclear-encoded photosynthetic genes Lhcb and RbcS noticeably decreased after exposure to blue and red LEDs, compared to white LED”
t0“Rice Seedlings”
Claim · model-written summary
The authors suggest that specific LED wavelengths influence plant growth characteristics partly by altering metabolic regulation of the porphyrin biosynthetic pathway.
- Taxon
- plantsViridiplantaee0
- Treatment
- specific wavelengths of LEDe0
- Outcome
- characteristics of growthe0
- Qualifier
- altering the metabolic regulation of the porphyrin biosynthetic pathwaye0
Verbatim
e0“specific wavelengths of LED greatly influence characteristics of growth in plants partly through altering the metabolic regulation of the porphyrin biosynthetic pathway”
The same questions in other papers
light · growth · Oryza sativa (rice)Positive and negative results
54 papers in the same direction as this paper · 38 in the opposite direction · 2 reporting no difference from an alternative
- negative
- no effect
- negative
91 papers more in this group
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