Quercus variabilis 1,170 claims

species · family Fagaceae · green plant · NCBI Taxonomy ↗

Also written in claims: Q.variabilis · oriental oak · oak · Q . variabilis · Q variabilis · Q. variabilis BL

57 spellings

Questions studied on this organism15 questions24 papers

Quercus variabilisVelela · Public domain · Wikimedia Commons ↗

1,170 claims

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Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

In Q. variabilis, warming initially reduced CH4 uptake at +5 C.

Taxon: Q. variabilisQuercus variabilise0
Treatment: warminge1
Outcome: CH4 uptakee1
Direction: reducede1
Qualifier: +5 °Ce1

Not reportedComparator

Verbatim

e0
“In Q. variabilis”
✓ located verbatim in the source · abstract, characters 912–928

e1
“warming initially reduced CH4 uptake at +5 °C”
✓ located verbatim in the source · abstract, characters 930–975

Title

Soil Carbon Flux Responses to Warming and Drought Are Mediated by Soil Moisture and Vary Among Quercus Species

Amna Saher; Heejae Jo; Jeong-Min Lee; et al. Forests 2026. doi:10.3390/f17030293

Other claims from this paper (7)

Intervention effect In both Quercus species warming initially increased soil CO2 emissions by 23%-26%.
Intervention effect Warming subsequently reduced CO2 emissions by 26%-37% during period 2 (rainy season).
Intervention effect Drought reduced soil CO2 emissions by 12%-36%.
Association CO2 emissions were positively correlated with soil moisture (r = 0.45-0.56).
Intervention effect In Q. variabilis, during period 3 CH4 uptake increased by 44.5% and 24.8% under +3 and +5 C warming.
Intervention effect In Q. variabilis, the drought treatment reduced CH4 uptake by 11.7%.
Intervention effect Q. acutissima showed no warming or drought treatment effects.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

In Q. variabilis, during period 3 CH4 uptake increased by 44.5% and 24.8% under +3 and +5 C warming.

Taxon: Q. variabilisQuercus variabilise0
Treatment: +3 and +5 °C treatmentse1
Outcome: uptakee1
Direction: increasede1
Value: 44.5% and 24.8%e1
Qualifier: during period 3e1

Not reportedComparator

Verbatim

e0
“In Q. variabilis”
✓ located verbatim in the source · abstract, characters 912–928

e1
“during period 3, uptake increased by 44.5% and 24.8% under +3 and +5 °C treatments, respectively”
✓ located verbatim in the source · abstract, characters 986–1082

Title

Soil Carbon Flux Responses to Warming and Drought Are Mediated by Soil Moisture and Vary Among Quercus Species

Amna Saher; Heejae Jo; Jeong-Min Lee; et al. Forests 2026. doi:10.3390/f17030293

Other claims from this paper (7)

Intervention effect In both Quercus species warming initially increased soil CO2 emissions by 23%-26%.
Intervention effect Warming subsequently reduced CO2 emissions by 26%-37% during period 2 (rainy season).
Intervention effect Drought reduced soil CO2 emissions by 12%-36%.
Association CO2 emissions were positively correlated with soil moisture (r = 0.45-0.56).
Intervention effect In Q. variabilis, warming initially reduced CH4 uptake at +5 C.
Intervention effect In Q. variabilis, the drought treatment reduced CH4 uptake by 11.7%.
Intervention effect Q. acutissima showed no warming or drought treatment effects.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

In Q. variabilis, the drought treatment reduced CH4 uptake by 11.7%.

Taxon: Q. variabilisQuercus variabilise0
Treatment: drought treatmente1
Outcome: CH4 uptakee1
Direction: reducede1
Value: 11.7%e1

Not reportedComparator

Verbatim

e0
“In Q. variabilis”
✓ located verbatim in the source · abstract, characters 912–928

e1
“while the drought treatment reduced CH4 uptake by 11.7%”
✓ located verbatim in the source · abstract, characters 1084–1139

Title

Soil Carbon Flux Responses to Warming and Drought Are Mediated by Soil Moisture and Vary Among Quercus Species

Amna Saher; Heejae Jo; Jeong-Min Lee; et al. Forests 2026. doi:10.3390/f17030293

Other claims from this paper (7)

Intervention effect In both Quercus species warming initially increased soil CO2 emissions by 23%-26%.
Intervention effect Warming subsequently reduced CO2 emissions by 26%-37% during period 2 (rainy season).
Intervention effect Drought reduced soil CO2 emissions by 12%-36%.
Association CO2 emissions were positively correlated with soil moisture (r = 0.45-0.56).
Intervention effect In Q. variabilis, warming initially reduced CH4 uptake at +5 C.
Intervention effect In Q. variabilis, during period 3 CH4 uptake increased by 44.5% and 24.8% under +3 and +5 C warming.
Intervention effect Q. acutissima showed no warming or drought treatment effects.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Net photosynthetic rate was 11.4% lower under drought than under ambient precipitation in the early phase.

Taxon: Quercus variabilisQuercus variabilise0
Treatment: droughte2
Outcome: net photosynthetic rate (Pn)e1
Direction: lowere1
Value: 11.4%e1
Qualifier: early phasee1
Comparator: ambient: PCe2
Setting: open-field conditionse4

Verbatim

e0
“physiological and growth responses of Quercus variabilis”
✓ located verbatim in the source · abstract, characters 112–168

e1
“In the early phase of the experiment, net photosynthetic rate (Pn) was 11.4% lower in DR than in PC”
✓ located verbatim in the source · abstract, characters 553–652

e2
“precipitation (ambient: PC; drought: DR)”
✓ located verbatim in the source · abstract, characters 416–456

e4
“under open-field conditions”
✓ located verbatim in the source · abstract, characters 246–273

Title

Effects of Combined Extreme Warming and Drought on the Physiology and Growth of Quercus variabilis Blume Seedlings

Se Hee Lee; Ji Won Jang; Seung Hyun Han; et al. Plants 2026. doi:10.3390/plants15091354

Other claims from this paper (9)

Intervention effect Net photosynthetic rate did not differ significantly between drought and ambient precipitation in the late phase.
Association Stomatal conductance was significantly affected by the interaction between temperature and precipitation.
Intervention effect Stomatal conductance was maintained or enhanced under drought, despite the decline in photosynthesis.
Mechanism The decline in photosynthesis is suggested to be driven by non-stomatal limitations such as photosystem II impairment or reduced Rubisco activity.
Intervention effect Late-phase intrinsic water-use efficiency was 24.3% lower under +5 °C than under ambient temperature.
Intervention effect Root collar diameter was more sensitive to drought than height growth.
Intervention effect Shoot biomass was 23.7% higher under +5 °C than under +3 °C.
Intervention effect Root biomass was 20.5% higher under +5 °C than under ambient temperature.
Association The root-to-shoot ratio did not differ significantly among temperature and precipitation treatments.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Net photosynthetic rate did not differ significantly between drought and ambient precipitation in the late phase.

Taxon: Quercus variabilisQuercus variabilise0
Treatment: droughte2
Outcome: net photosynthetic rate (Pn)e1
Direction: no_changeinferrede3
Qualifier: late phasee3
Comparator: ambient: PCe2

Verbatim

e0
“physiological and growth responses of Quercus variabilis”
✓ located verbatim in the source · abstract, characters 112–168

e1
“In the early phase of the experiment, net photosynthetic rate (Pn) was 11.4% lower in DR than in PC”
✓ located verbatim in the source · abstract, characters 553–652

e2
“precipitation (ambient: PC; drought: DR)”
✓ located verbatim in the source · abstract, characters 416–456

e3
“whereas differences were no longer significant in the late phase”
✓ located verbatim in the source · abstract, characters 654–718

Title

Effects of Combined Extreme Warming and Drought on the Physiology and Growth of Quercus variabilis Blume Seedlings

Se Hee Lee; Ji Won Jang; Seung Hyun Han; et al. Plants 2026. doi:10.3390/plants15091354

Other claims from this paper (9)

Intervention effect Net photosynthetic rate was 11.4% lower under drought than under ambient precipitation in the early phase.
Association Stomatal conductance was significantly affected by the interaction between temperature and precipitation.
Intervention effect Stomatal conductance was maintained or enhanced under drought, despite the decline in photosynthesis.
Mechanism The decline in photosynthesis is suggested to be driven by non-stomatal limitations such as photosystem II impairment or reduced Rubisco activity.
Intervention effect Late-phase intrinsic water-use efficiency was 24.3% lower under +5 °C than under ambient temperature.
Intervention effect Root collar diameter was more sensitive to drought than height growth.
Intervention effect Shoot biomass was 23.7% higher under +5 °C than under +3 °C.
Intervention effect Root biomass was 20.5% higher under +5 °C than under ambient temperature.
Association The root-to-shoot ratio did not differ significantly among temperature and precipitation treatments.

Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Stomatal conductance was significantly affected by the interaction between temperature and precipitation.

Taxon: Quercus variabilisQuercus variabilise0
Treatment: interaction between temperature and precipitatione5
Outcome: Stomatal conductance (gs)e5

Not reportedDirection

Verbatim

e0
“physiological and growth responses of Quercus variabilis”
✓ located verbatim in the source · abstract, characters 112–168

e5
“Stomatal conductance (gs) was significantly affected by the interaction between temperature and precipitation”
✓ located verbatim in the source · abstract, characters 720–829

Title

Effects of Combined Extreme Warming and Drought on the Physiology and Growth of Quercus variabilis Blume Seedlings

Se Hee Lee; Ji Won Jang; Seung Hyun Han; et al. Plants 2026. doi:10.3390/plants15091354

Other claims from this paper (9)

Intervention effect Net photosynthetic rate was 11.4% lower under drought than under ambient precipitation in the early phase.
Intervention effect Net photosynthetic rate did not differ significantly between drought and ambient precipitation in the late phase.
Intervention effect Stomatal conductance was maintained or enhanced under drought, despite the decline in photosynthesis.
Mechanism The decline in photosynthesis is suggested to be driven by non-stomatal limitations such as photosystem II impairment or reduced Rubisco activity.
Intervention effect Late-phase intrinsic water-use efficiency was 24.3% lower under +5 °C than under ambient temperature.
Intervention effect Root collar diameter was more sensitive to drought than height growth.
Intervention effect Shoot biomass was 23.7% higher under +5 °C than under +3 °C.
Intervention effect Root biomass was 20.5% higher under +5 °C than under ambient temperature.
Association The root-to-shoot ratio did not differ significantly among temperature and precipitation treatments.

Intervention effectauthor interpretationoriginal resultmixedmeasured

Claim · model-written summary

Stomatal conductance was maintained or enhanced under drought, despite the decline in photosynthesis.

Taxon: Quercus variabilisQuercus variabilise0
Treatment: droughte2
Outcome: stomatal conductancee6
Direction: maintained or enhancede6

Not reportedComparator

Verbatim

e0
“physiological and growth responses of Quercus variabilis”
✓ located verbatim in the source · abstract, characters 112–168

e2
“precipitation (ambient: PC; drought: DR)”
✓ located verbatim in the source · abstract, characters 416–456

e6
“despite maintained or enhanced stomatal conductance”
✓ located verbatim in the source · abstract, characters 990–1041

Title

Effects of Combined Extreme Warming and Drought on the Physiology and Growth of Quercus variabilis Blume Seedlings

Se Hee Lee; Ji Won Jang; Seung Hyun Han; et al. Plants 2026. doi:10.3390/plants15091354

Other claims from this paper (9)

Intervention effect Net photosynthetic rate was 11.4% lower under drought than under ambient precipitation in the early phase.
Intervention effect Net photosynthetic rate did not differ significantly between drought and ambient precipitation in the late phase.
Association Stomatal conductance was significantly affected by the interaction between temperature and precipitation.
Mechanism The decline in photosynthesis is suggested to be driven by non-stomatal limitations such as photosystem II impairment or reduced Rubisco activity.
Intervention effect Late-phase intrinsic water-use efficiency was 24.3% lower under +5 °C than under ambient temperature.
Intervention effect Root collar diameter was more sensitive to drought than height growth.
Intervention effect Shoot biomass was 23.7% higher under +5 °C than under +3 °C.
Intervention effect Root biomass was 20.5% higher under +5 °C than under ambient temperature.
Association The root-to-shoot ratio did not differ significantly among temperature and precipitation treatments.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The decline in photosynthesis is suggested to be driven by non-stomatal limitations such as photosystem II impairment or reduced Rubisco activity.

Taxon: Quercus variabilisQuercus variabilise0
Outcome: decline in photosynthesise7
Qualifier: non-stomatal limitations such as photosystem II impairment or reduced Rubisco activitye7

Verbatim

e0
“physiological and growth responses of Quercus variabilis”
✓ located verbatim in the source · abstract, characters 112–168

e7
“the decline in photosynthesis was driven by non-stomatal limitations such as photosystem II impairment or reduced Rubisco activity”
✓ located verbatim in the source · abstract, characters 858–988

Title

Effects of Combined Extreme Warming and Drought on the Physiology and Growth of Quercus variabilis Blume Seedlings

Se Hee Lee; Ji Won Jang; Seung Hyun Han; et al. Plants 2026. doi:10.3390/plants15091354

Other claims from this paper (9)

Intervention effect Net photosynthetic rate was 11.4% lower under drought than under ambient precipitation in the early phase.
Intervention effect Net photosynthetic rate did not differ significantly between drought and ambient precipitation in the late phase.
Association Stomatal conductance was significantly affected by the interaction between temperature and precipitation.
Intervention effect Stomatal conductance was maintained or enhanced under drought, despite the decline in photosynthesis.
Intervention effect Late-phase intrinsic water-use efficiency was 24.3% lower under +5 °C than under ambient temperature.
Intervention effect Root collar diameter was more sensitive to drought than height growth.
Intervention effect Shoot biomass was 23.7% higher under +5 °C than under +3 °C.
Intervention effect Root biomass was 20.5% higher under +5 °C than under ambient temperature.
Association The root-to-shoot ratio did not differ significantly among temperature and precipitation treatments.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Late-phase intrinsic water-use efficiency was 24.3% lower under +5 °C than under ambient temperature.

Taxon: Quercus variabilisQuercus variabilise0
Treatment: +5 °Ce3
Outcome: intrinsic water-use efficiency (iWUE)e4
Direction: lowere4
Value: 24.3%e4
Qualifier: late phasee4
Comparator: TCe4

Verbatim

e0
“physiological and growth responses of Quercus variabilis”
✓ located verbatim in the source · abstract, characters 112–168

e3
“temperature (ambient: TC; +3 °C: T3; +5 °C: T5)”
✓ located verbatim in the source · abstract, characters 364–411

e4
“Consequently, intrinsic water-use efficiency (iWUE) during the late phase was 24.3% lower in T5 than in TC”
✓ located verbatim in the source · abstract, characters 1043–1149

Title

Effects of Combined Extreme Warming and Drought on the Physiology and Growth of Quercus variabilis Blume Seedlings

Se Hee Lee; Ji Won Jang; Seung Hyun Han; et al. Plants 2026. doi:10.3390/plants15091354

Other claims from this paper (9)

Intervention effect Net photosynthetic rate was 11.4% lower under drought than under ambient precipitation in the early phase.
Intervention effect Net photosynthetic rate did not differ significantly between drought and ambient precipitation in the late phase.
Association Stomatal conductance was significantly affected by the interaction between temperature and precipitation.
Intervention effect Stomatal conductance was maintained or enhanced under drought, despite the decline in photosynthesis.
Mechanism The decline in photosynthesis is suggested to be driven by non-stomatal limitations such as photosystem II impairment or reduced Rubisco activity.
Intervention effect Root collar diameter was more sensitive to drought than height growth.
Intervention effect Shoot biomass was 23.7% higher under +5 °C than under +3 °C.
Intervention effect Root biomass was 20.5% higher under +5 °C than under ambient temperature.
Association The root-to-shoot ratio did not differ significantly among temperature and precipitation treatments.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Root collar diameter was more sensitive to drought than height growth.

Taxon: Quercus variabilisQuercus variabilise0
Treatment: droughte1
Outcome: Root collar diameter (RCD)e1
Direction: more sensitivee1
Comparator: height growthe1

Verbatim

e0
“physiological and growth responses of Quercus variabilis”
✓ located verbatim in the source · abstract, characters 112–168

e1
“Root collar diameter (RCD) was more sensitive to drought than height growth”
✓ located verbatim in the source · abstract, characters 1151–1226

Title

Effects of Combined Extreme Warming and Drought on the Physiology and Growth of Quercus variabilis Blume Seedlings

Se Hee Lee; Ji Won Jang; Seung Hyun Han; et al. Plants 2026. doi:10.3390/plants15091354

Other claims from this paper (9)

Intervention effect Net photosynthetic rate was 11.4% lower under drought than under ambient precipitation in the early phase.
Intervention effect Net photosynthetic rate did not differ significantly between drought and ambient precipitation in the late phase.
Association Stomatal conductance was significantly affected by the interaction between temperature and precipitation.
Intervention effect Stomatal conductance was maintained or enhanced under drought, despite the decline in photosynthesis.
Mechanism The decline in photosynthesis is suggested to be driven by non-stomatal limitations such as photosystem II impairment or reduced Rubisco activity.
Intervention effect Late-phase intrinsic water-use efficiency was 24.3% lower under +5 °C than under ambient temperature.
Intervention effect Shoot biomass was 23.7% higher under +5 °C than under +3 °C.
Intervention effect Root biomass was 20.5% higher under +5 °C than under ambient temperature.
Association The root-to-shoot ratio did not differ significantly among temperature and precipitation treatments.