Abstract
Plants are exposed to varying irradiance and temperature within a day and from day to day. We previously investigated metabolism in a temperature-controlled greenhouse at the spring equinox on both a cloudy and a sunny day [daily light integral (DLI) of 7 mol m-2 d-1 and 12 mol m-2 d-1]. Diel metabolite profiles were largely captured in sinusoidal simulations at similar DLIs in controlled-environment chambers, except that amino acids were lower in natural light regimes. We now extend the DLI12 study by investigating metabolism in a natural light regime with variable temperature including cool nights. Starch was not completely turned over, anthocyanins and proline accumulated, and protein content rose. Instead of decreasing, amino acid content rose. Connectivity in central metabolism, which decreased in variable light, was not further weakened by variable temperature. We propose that diel metabolism operates better when light and temperature are co-varying. We also compared transcript abundance of 10 circadian clock genes in this temperature-variable regime with the temperature-controlled natural and sinusoidal light regimes. Despite temperature compensation, peak timing and abundance for dawn- and day-phased genes and GIGANTEA were slightly modified in the variable temperature treatment. This may delay dawn clock activity until the temperature rises enough to support rapid metabolism and photosynthesis.
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Claims 8
Claim · model-written summary
Starch was not completely turned over in Arabidopsis under natural light with variable temperature.
- Taxon
- Arabidopsis
Arabidopsist0 - Outcome
- Starche1
- Qualifier
- not completely turned overe1
- Setting
- natural light environmentt0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Arabidopsis primary metabolism and circadian clock to low night temperature in a natural light environment”
e1“Starch was not completely turned over, anthocyanins and proline accumulated, and protein content rose”
Claim · model-written summary
Anthocyanins and proline accumulated in Arabidopsis under variable temperature in natural light.
- Taxon
- ArabidopsisArabidopsist0
- Outcome
- anthocyanins and prolinee1
- Direction
- accumulatede1
- Setting
- natural light environmentt0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Arabidopsis primary metabolism and circadian clock to low night temperature in a natural light environment”
e1“Starch was not completely turned over, anthocyanins and proline accumulated, and protein content rose”
Claim · model-written summary
Protein content rose in Arabidopsis under variable temperature in natural light.
- Taxon
- ArabidopsisArabidopsist0
- Outcome
- protein contente1
- Direction
- rosee1
- Setting
- natural light environmentt0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Arabidopsis primary metabolism and circadian clock to low night temperature in a natural light environment”
e1“Starch was not completely turned over, anthocyanins and proline accumulated, and protein content rose”
Claim · model-written summary
Amino acid content rose in Arabidopsis under variable temperature in natural light, instead of decreasing.
- Taxon
- ArabidopsisArabidopsist0
- Outcome
- amino acid contente2
- Direction
- rosee2
- Qualifier
- Instead of decreasinge2
- Setting
- natural light environmentt0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Arabidopsis primary metabolism and circadian clock to low night temperature in a natural light environment”
e2“Instead of decreasing, amino acid content rose”
Claim · model-written summary
Variable temperature did not further weaken the connectivity in central metabolism that decreased in variable light.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- variable temperaturee3
- Outcome
- Connectivity in central metabolisme3
- Direction
- not further weakenede3
- Comparator
- variable lighte3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Arabidopsis primary metabolism and circadian clock to low night temperature in a natural light environment”
e3“Connectivity in central metabolism, which decreased in variable light, was not further weakened by variable temperature”
Claim · model-written summary
In the variable temperature treatment, peak timing and abundance of dawn- and day-phased genes and GIGANTEA were slightly modified relative to temperature-controlled light regimes.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- variable temperature treatmente4
- Gene
- dawn- and day-phased genes and GIGANTEAe4
- Outcome
- peak timing and abundancee4
- Direction
- modifiede4
- Qualifier
- slightlye4
- Comparator
- temperature-controlled natural and sinusoidal light regimese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Arabidopsis primary metabolism and circadian clock to low night temperature in a natural light environment”
e4“Despite temperature compensation, peak timing and abundance for dawn- and day-phased genes and GIGANTEA were slightly modified in the variable temperature treatment”
e5“We also compared transcript abundance of 10 circadian clock genes in this temperature-variable regime with the temperature-controlled natural and sinusoidal light regimes”
Claim · model-written summary
Variable temperature may delay dawn clock activity until the temperature rises enough to support rapid metabolism and photosynthesis.
- Taxon
- ArabidopsisArabidopsist0
- Outcome
- dawn clock activitye7
- Qualifier
- until the temperature rises enough to support rapid metabolism and photosynthesise7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Arabidopsis primary metabolism and circadian clock to low night temperature in a natural light environment”
e7“This may delay dawn clock activity until the temperature rises enough to support rapid metabolism and photosynthesis”
Claim · model-written summary
Diel metabolism may operate better when light and temperature co-vary.
- Taxon
- ArabidopsisArabidopsist0
- Outcome
- diel metabolism operates bettere6
- Qualifier
- when light and temperature are co-varyinge6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of Arabidopsis primary metabolism and circadian clock to low night temperature in a natural light environment”
e6“We propose that diel metabolism operates better when light and temperature are co-varying”