Search claims · PlantClaims

Intervention effect 1237

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Waterlogging response: photosynthesis intensity decrease.

Taxon: TomatoSolanum lycopersicumt0
Treatment: stresse0
Outcome: photosynthesis intensitye0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“The decrease in photosynthesis intensity was noticed in the case of stressed plants”
✓ located verbatim in the source · abstract, characters 1100–1183

t0
“Tomato”
✓ located verbatim in the source · title, characters 103–109

Title

Physiological Changes and PP2A-C Expression Modulated by Waterlogging Conditions Are Organ-Specific in Tomato Seedlings

Anna Kołton; Monika A. Czaja; Maria T. Creighton; et al. Agronomy 2025. doi:10.3390/agronomy15030507

Other claims from this paper (5)

Intervention effect Waterlogging response: total PP2A-C decrease.
Intervention effect Waterlogging response: PP2A-related activity no significant changes.
Intervention effect Waterlogging response: total PP2A-C increase.
Intervention effect Waterlogging response: PP2A-related activity doubling.
Intervention effect Waterlogging response: nitrate reductase activity and the levels of free amino acids increased.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Water stress caused a proportionally greater decrease in S. junceum leaf photosynthesis than in stem photosynthesis.

Taxon: S. junceume5
Treatment: Water stresse5
Outcome: leaf photosynthesise5
Direction: proportionally greater decreasee5
Comparator: stemse5

Verbatim

e5
“Water stress caused a proportionally greater decrease in leaf photosynthesis compared to that of stems during diurnal cycles of photosynthesis in S. junceum”
✓ located verbatim in the source · abstract, characters 710–866

Title

The Influence of Water Stress on Stem and Leaf Photosynthesis in Glycine max and Sparteum junceum (Leguminosae)

Erik T. Nilsen; Yijia Bao American Journal of Botany 1990. doi:10.2307/2444572

Other claims from this paper (7)

Observation Mean midday leaf photosynthesis of G. max (var. essex) was 12 μmol CO2 m–2 s–1.
Observation Mean midday leaf photosynthesis of S. junceum was 17 μmol CO2 m–2 s–1.
Observation Mean midday stem photosynthesis of S. junceum was 6.5 μmol CO2 m–2 s–1.
Observation G. max stems did not show positive net photosynthesis.
Intervention effect Blocking stem photosynthesis with black straws reduced S. junceum growth by 18% relative to clear straws.
Intervention effect Blocking the stem carbon contribution did not influence whole plant growth of G. max.
Intervention effect Under reduced water availability, the stem contribution to canopy carbon gain of S. junceum increased from 38% to 48%.

Intervention effectobservedreview summarynegativemeasured

Claim · model-written summary

SXD1-deficient plants were unable to decrease the expression of genes essential for photosynthesis.

Taxon: SXD1-deficient plantse4
Treatment: SXD1-deficiente4
Outcome: expression of genes essential for photosynthesise4
Direction: unable to decreasee4

Not reportedComparator

Verbatim

e4
“Rather, SXD1-deficient plants were unable to decrease the expression of genes essential for photosynthesis”
✓ located verbatim in the source · abstract, characters 548–654

Title

Chloroplast to Nucleus Feedback by SXD1

Science s STKE 2001. doi:10.1126/stke.2001.82.tw3

Other claims from this paper (6)

Mechanism 292

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Mechanismobservedoriginal resultnegativemeasured

Claim · model-written summary

Changes in photosynthesis, respiration and triose-P utilization explain the biomass decrease.

Taxon: Lotus japonicusLotus japonicust0
Outcome: decrease in plant biomasse0
Qualifier: Changes in photosynthesis, respiration and triose-P utilizatione0

Verbatim

e0
“Changes in photosynthesis, respiration and triose-P utilization explain the decrease in plant biomass”
✓ located verbatim in the source · abstract, characters 1211–1312

t0
“Lotus japonicus”
✓ located verbatim in the source · title, characters 66–81

Title

The effects of limiting phosphate on photosynthesis and growth of Lotus japonicus

Rochelle Thuynsma; Aleysia Kleinert; Jens Kossmann; et al. South African Journal of Botany 2016. doi:10.1016/j.sajb.2016.03.001

Other claims from this paper (8)

Intervention effect Phosphate deprivation decreased plant biomass.
Intervention effect Phosphate deprivation decreased overall photosynthetic reactions.
Intervention effect Phosphate deprivation decreased the photosynthesis:respiration ratio.
Intervention effect Phosphate deprivation decreased triose-P utilization.
Intervention effect The root:shoot ratio showed no significant increase under phosphate deprivation.
Intervention effect Direct photosynthetic measurements showed no significant decrease under phosphate deprivation.
Intervention effect Direct respiration measurements showed no significant decrease under phosphate deprivation.
Mechanism Consistent allocation to roots and shoots could explain the root:shoot result.

Mechanismauthor interpretationreview summarynegativebasis n/a

Claim · model-written summary

Leaf rust defoliation can decrease photosynthesis.

Taxon: southern highbush blueberriese1
Outcome: photosynthesise0
Direction: decreasee0
Qualifier: defoliatione0

Verbatim

e0
“Severe leaf rust causes defoliation in the fall or early winter, which can decrease floral bud differentiation, photosynthesis, and the next season’s fruit yield”
✓ located verbatim in the source · abstract, characters 151–312

e1
“southern highbush blueberries”
✓ located verbatim in the source · abstract, characters 37–66

Title

Leaf Rust Disease of Southern Highbush Blueberry in Florida

Philip F. Harmon; Christ Mane Belizaire; Douglas A. Phillips EDIS 2025. doi:10.32473/edis-pp385-2025

Other claims from this paper (4)

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The authors attribute the initial photosynthetic decrease to stomatal closure.

Taxon: potatoSolanum tuberosumt0
Interactor: V. dahliaeVerticillium dahliaee0pathogen
Outcome: initial decrease in photosynthesise0
Qualifier: stomatal closuree0

Verbatim

e0
“the initial decrease in photosynthesis caused by V. dahliae was caused by stomatal closure”
✓ located verbatim in the source · abstract, characters 421–511

t0
“Mechanism of Photosynthesis Decrease by Verticillium dahliae in Potato”
✓ located verbatim in the source · title, characters 0–70

Title

Mechanism of Photosynthesis Decrease by Verticillium dahliae in Potato

Robert L. Bowden; Douglas I. Rouse; Thomas D. Sharkey PLANT PHYSIOLOGY 1990. doi:10.1104/pp.94.3.1048

Other claims from this paper (7)

Intervention effect Infected symptomless potato leaves had reduced carbon assimilation, stomatal conductance and intercellular CO(2).
Intervention effect Infection did not increase dark respiration.
Intervention effect Infection did not change the assimilation versus intercellular CO(2) relation.
Intervention effect Infection did not change light use efficiency at constant intercellular CO(2).
Observation Patchiness in carbon assimilation was found at low frequency.
Association Low stomatal conductance correlated with low leaf water potentials.
Intervention effect Infection did not affect leaf osmotic potential.

Association 228

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Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

The decrease in acetylene reduction correlated with decreases in photosynthesis and transpiration.

Taxon: SoybeanGlycine maxt0
Outcome: photosynthesis and transpiratione0
Direction: decreasese0
Comparator: the decreasee0

Verbatim

e0
“the decrease was correlated with decreases in photosynthesis and transpiration”
✓ located verbatim in the source · abstract, characters 1187–1265

t0
“Soybean”
✓ located verbatim in the source · title, characters 68–75

Title

Acetylene Reduction (Nitrogen Fixation) and Metabolic Activities of Soybean Having Various Leaf and Nodule Water Potentials

Chi-Ying Huang; John S. Boyer; Larry N. Vanderhoef PLANT PHYSIOLOGY 1975. doi:10.1104/pp.56.2.222

Other claims from this paper (12)

Method / resource The apparatus measured nodule acetylene reduction and shoot gas exchange simultaneously.
Observation Acetylene reduction was linear for at least five hours except initially.
Method / resource Endogenous ethylene did not affect measurements.
Method / resource Repeated acetylene reduction measurements had no apparent aftereffects.
Intervention effect Acetylene reduction was undetectable in flooded soil and at severe desiccation.
Intervention effect Acetylene reduction was undetectable at a soil water potential of -19.5 bars.
Observation Acetylene reduction had a sharp optimum between flooded and severely dry soil.
Intervention effect Removing soil eliminated flooding inhibition.
Mechanism Gas exchange restriction was proposed to explain flooding inhibition above -2 bars.
Association Acetylene reduction decreased with further soil drying.
Observation Dark respiration was inhibited less than the other measured processes.
Mechanism Photosynthesis, transpiration, or direct nodule effects were proposed to account for nitrogen fixation inhibition below -2 bars.

Associationauthor interpretationoriginal resultnegativesimulated

Claim · model-written summary

The authors suggest that factors increasing transpiration without directly affecting photosynthesis decrease photosynthesis through water stress.

Taxon: vascular plante0
Treatment: Factors increasing transpiration without directly affecting photosynthesise1
Outcome: photosynthesise1
Direction: decreasee1
Qualifier: because of the effect on water stresse1

Verbatim

e0
“Total seasonal vascular plant CO_2 uptake ranged from 400—627 g CO_2 m_G ( —2)”
✓ located verbatim in the source · abstract, characters 1191–1269

e1
“Factors increasing transpiration without directly affecting photosynthesis tend to decrease photosynthesis because of the effect on water stress”
✓ located verbatim in the source · abstract, characters 1851–1995

Title

A Model of Stand Photosynthesis for the Wet Meadow Tundra at Barrow, Alaska

Philip C. Miller; Wayne A. Stoner; Larry L. Tieszen Ecology 1976. doi:10.2307/1936428

Other claims from this paper (15)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Photosynthesis tended to decrease under N deficiency but contributed little to reduced carbon gain.

Taxon: grapevineVitist0
Treatment: N deficiencye0
Outcome: photosynthesis ratee0
Direction: decreasee0

Verbatim

e0
“photosynthesis rate tended to decrease under N deficiency over the season, it only poorly contributed to the reduction in C gain”
✓ located verbatim in the source · abstract, characters 2580–2708

t0
“grapevine”
✓ located verbatim in the source · title, characters 21–30

Title

Gradual responses of grapevine yield components and carbon status to nitrogen supply

Sylvain Vrignon-Brenas; Metay Aurélie; Leporatti Romain; et al. OENO One 2019. doi:10.20870/oeno-one.2019.53.2.2431

Other claims from this paper (13)

Intervention effect Under low nitrogen, SPAD declined from 31 to 16 in the first year.
Intervention effect In year two, SPAD was 40 at 160N and 19 at 0N after budburst.
Observation SPAD differences among nitrogen treatments persisted through 2018 harvest.
Intervention effect Berry number per inflorescence ranged from 180 at 80N to 34 at 0N.
Intervention effect Individual berry dry matter increased from 0.13 at 160N to 0.41 g at 0N.
Association Lower N reduced carbon gain mainly through leaf area reduction before flowering.
Association Whole-plant carbon growth fell with declining nitrogen status by -1.13% at harvest.
Association Shoot dry matter was inhibited before veraison by -1.81%.
Association Berry dry matter was lower by -0.80% at harvest.
Association Trunk dry matter was lower by -0.42% at harvest.
Association Root dry matter was lower by -0.84% at harvest.
Association Lower root starch reserves were associated with root dry matter reduction at harvest.
Intervention effect Starch reserves tended to be higher under organic than mineral nitrogen supply.

Observation 172

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Observationobservedreview summarynegativebasis n/a

Claim · model-written summary

Chlorophyll content and photosynthesis rate decrease as senescence progresses.

Taxon: higher plantt0
Organ / stage: leaft0
Outcome: contents of chlorophyll and the photosynthesis ratee0
Direction: decreasee0

Verbatim

e0
“With further senescence,both the contents of chlorophyll and the photosynthesis rate decrease.”
✓ located verbatim in the source · abstract, characters 131–225

t0
“Leaf senescence in higher plant”
✓ located verbatim in the source · title, characters 0–31

Title

Leaf senescence in higher plant

Gao Jun 2001

Other claims from this paper (4)

Observation Protein loss occurs early in leaf senescence.
Observation The degraded soluble protein is mainly fraction I protein.
Observation Protective enzyme activity decreases during senescence.
Mechanism Leaf senescence is attributed to disturbed metabolism of active oxygen and free radicals.

Observationobservedreview summarynegativebasis n/a

Claim · model-written summary

Stress is usually perceived in plants as a decrease in photosynthesis and growth.

Taxon: Plantt0
Treatment: stresse0
Outcome: photosynthesis and growthe0
Direction: decreasee0

Verbatim

t0
“Plant Responses to Drought, Acclimation, and Stress Tolerance”
✓ located verbatim in the source · title, characters 0–61

e0
“the effect of stress is usually perceived as a decrease in photosynthesis and growth”
✓ located verbatim in the source · abstract, characters 26–110

Title

Plant Responses to Drought, Acclimation, and Stress Tolerance

I. Yordanov; V. Velikova; T. Tsonev Photosynthetica 2000. doi:10.1023/a:1007201411474

Other claims from this paper (2)

Observationobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Photosynthesis of the grassland showed a significant decrease during each growing season.

Taxon: species-rich semi-natural grasslande2
Outcome: photosynthesise3
Direction: decreasee3
Setting: Central Swedene2

Verbatim

e3
“Although photosynthesis showed a significant decrease during each growing season”
✓ located verbatim in the source · abstract, characters 698–778

e2
“in a species-rich semi-natural grassland with a long history of grazing in Central Sweden”
✓ located verbatim in the source · abstract, characters 156–245

Title

Photosynthesis and biomass under elevated CO2 in a semi-natural grassland - a six-years' field study

Roger Pettersson; Erik Sindhöj Science Access 2001. doi:10.1071/sa0403635

Other claims from this paper (9)

Intervention effect Elevated CO2 stimulated light-saturated leaf-level photosynthesis of Taraxacum vulgare.
Intervention effect Elevated CO2 stimulated light-saturated leaf-level photosynthesis of Plantago media.
Intervention effect The CO2 effect on photosynthesis showed no trend over the years.
Intervention effect The CO2 effect on leaf-level photosynthesis was larger in dry and extremely dry summers than in rainy summers.
Intervention effect Elevated CO2 stimulated above-ground production in 1995-1997.
Intervention effect Elevated CO2 did not change above-ground production in 1998-2000.
Intervention effect Elevated CO2 stimulated root production during each growing season.
Mechanism The lack of above-ground production response may be explained by unusual weather circumstances.
Mechanism Increasing nutrient limitation might also be involved in the lack of above-ground production response.

Method / resource 1

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Method / resourceobservedoriginal resultnegativesimulated

Claim · model-written summary

Common models strongly overestimated wheat leaf photosynthesis under variable temperature and drought.

Taxon: wheatTriticum aestivume0 t0 e1 e2 e3 e4 e5
Treatment: variable temperature and droughte0 t0 e1 e2 e3 e4 e5
Outcome: leaf photosynthesise0 t0 e1 e2 e3 e4 e5
Direction: overestimatee0 t0 e1 e2 e3 e4 e5
Comparator: acclimation responses of biochemical parameterse0 t0 e1 e2 e3 e4 e5

Verbatim

e0
“The commonly used modelling approaches, which typically consider the response of diffusional parameters, but ignore acclimation responses of biochemical parameters to drought and T growth , strongly overestimate leaf photosynthesis under variable temperature and drought”
✓ located verbatim in the source · abstract, characters 1938–2208

t0
“wheat”
✓ located verbatim in the source · title, characters 121–126

e1
“well‐watered conditions”
✓ located verbatim in the source · abstract, characters 1275–1298

e2
“T opt for V cmax was up to 40°C under well‐watered conditions”
✓ located verbatim in the source · abstract, characters 1237–1298

e3
“The decrease in photosynthesis under drought varied among T growth”
✓ located verbatim in the source · abstract, characters 1326–1392

e4
“The temperature response of photosynthetic quantum yield under drought was partly attributed to photorespiration”
✓ located verbatim in the source · abstract, characters 1428–1540

e5
“both diffusional and biochemical parameters of photosynthesis and their thermal sensitivity acclimate little to T growth”
✓ located verbatim in the source · abstract, characters 1731–1851

Title

Neglecting acclimation of photosynthesis under drought can cause significant errors in predicting leaf photosynthesis in wheat

Liang Fang; Pierre Martre; Kaining Jin; et al. Global Change Biology 2022. doi:10.1111/gcb.16488

Other claims from this paper (16)

Observation Wheat photosynthesis acclimated more to drought than to growth temperature.
Intervention effect Drought lowered the optimum temperature of wheat photosynthesis.
Intervention effect Drought lowered wheat light‐saturated net photosynthesis at the photosynthetic optimum.
Intervention effect Drought lowered wheat stomatal conductance at the photosynthetic optimum.
Intervention effect Drought lowered wheat mesophyll conductance at the photosynthetic optimum.
Intervention effect Drought lowered wheat maximum rate of electron transport ( J max ) at the photosynthetic optimum.
Intervention effect Drought lowered wheat maximum rate of carboxylation by Rubisco ( V cmax ) at the photosynthetic optimum.
Observation Optimum temperature for wheat V cmax reached 40°C when well watered.
Observation Optimum temperature for wheat V cmax was 24–34°C under drought.
Association The decrease in wheat photosynthesis under drought varied with growth temperature.
Observation The drought decrease in wheat photosynthesis was similar across genotypes.
Mechanism Photorespiration partly explained the temperature response of wheat photosynthetic quantum yield under drought.
Mechanism Alternative electron transport explained more of the wheat quantum yield response under drought.
Mechanism Changed wheat leaf nitrogen did not fully explain the biochemical parameter changes.
Observation Wheat diffusional and biochemical photosynthesis parameters acclimated little to growth temperature.
Observation Wheat photosynthetic parameters acclimated considerably to drought and combined drought and growth temperature.

“decrease of the photosynthesis”

Claim types

Direction of the findings

Over time

Claim type

Research area

Polarity

Statistics

Intervention effect 1237

Mechanism 292

Association 228

Observation 172

Method / resource 1