Search claims · PlantClaims

Observationobservedoriginal resultmeasured

Claim · model-written summary

Ammonium did not decrease photosynthesis per area.

Taxon: Sugar beetsBeta vulgaris subsp. vulgarist0
Outcome: rate of photosynthesis per areae0
Direction: did not decreasee0

Verbatim

e0
“did not decrease the rate of photosynthesis per area”
✓ located verbatim in the source · abstract, characters 1068–1120

t0
“Sugar beets (Beta vulgaris L. cv F58-554H1)”
✓ located verbatim in the source · abstract, characters 0–43

Title

Nitrogen Source Regulation of Growth and Photosynthesis in Beta vulgaris L

T. K. Raab; N. Terry PLANT PHYSIOLOGY 1994. doi:10.1104/pp.105.4.1159

Other claims from this paper (11)

Observation Ammonium initially slowed shoot growth more than root growth.
Observation Ammonium reduced leaf area expansion and relative water content.
Observation Ammonium increased leaf dry matter per area.
Observation Ammonium doubled chloroplast volume.
Observation Ammonium increased chlorophyll content up to 62%.
Observation Ammonium raised soluble protein accumulation 4.3 fold.
Observation Ammonium decreased leaf surface expansion rate.
Observation Net photosynthetic CO2 exchange was slightly higher under ammonium.
Observation Several Calvin cycle enzymes increased in extractable activity.
Observation Nitrogen source had no effect on stomatal conductance.
Observation Photosynthesis per chlorophyll decreased slightly under ammonium.

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 resultmeasured

Claim · model-written summary

Canopy apparent photosynthesis of sunflower began to decrease at the filling stage.

Taxon: sunflowerHelianthus annuust0
Organ / stage: filling stagee4
Outcome: CAPe4
Direction: decreasee4

Verbatim

t0
“sunflower lines”
✓ located verbatim in the source · title, characters 52–67

e4
“At the filling stage, the CAP began to decrease”
✓ located verbatim in the source · abstract, characters 572–619

Title

Photosynthetic characteristics in two high yielding sunflower lines

Feng Zhang 2000

Other claims from this paper (5)

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.

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

The decrease in photosynthesis did not have a corresponding decrease in transpiration rate.

Taxon: Sangiovese Grapevinet0
Outcome: transpiration ratee0
Direction: reductione0

Verbatim

t0
“Sangiovese Grapevine”
✓ located verbatim in the source · title, characters 92–112

e0
“A corresponding reduction in the transpiration rate was not observed”
✓ located verbatim in the source · abstract, characters 679–747

Title

Effects of Soil Management on Physiological, Vegetative and Reproductive Characteristics of Sangiovese Grapevine

Giovan Battista Mattii; Francesco Ferrini; P. Storichi Florence Research (University of Florence) 2005. doi:10.1400/14429

Other claims from this paper (10)

Intervention effect Ground cover decreased vine net photosynthesis relative to soil tilling.
Observation Tall fescue had the lowest net photosynthesis in both years.
Observation Soil tilling had the highest net photosynthesis in both years.
Mechanism The reduction in photosynthesis was interpreted as regulated by a non-stomatal mechanism.
Intervention effect Grass-covered plots reduced pruning material weight, shoot growth and leaf area per vine in both years.
Intervention effect Groundcover reduced vine yields, especially Tall fescue.
Intervention effect Groundcover lowered cluster number.
Intervention effect Groundcover lowered cluster weight.
Intervention effect All grass covers reduced time between veraison and harvest, especially fescue.
Recommendation Groundcover was proposed for dry areas to improve berry quality and harvest date.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Sunflower turgor and photosynthesis recovered as stomatal conductance began to decrease

Taxon: sunflowerHelianthus annuuse7
Outcome: recovery of turgor and photosynthesise6
Qualifier: as stomatal conductance began to decreasee6

Verbatim

e7
“for leaves of sunflower (Helianthus animus L.) grown at low PPFD, the increase in VPD led to leaf wilting and decreased photosynthesis”
✓ located verbatim in the source · abstract, characters 1088–1222

e6
“followed by recovery of turgor and photosynthesis as stomatal conductance began to decrease”
✓ located verbatim in the source · abstract, characters 1224–1315

Title

In-Phase Cycling of Photosynthesis and Conductance at Saturating Carbon Dioxide Pressure Induced by Increases in Water Vapour Pressure Deficit

JAMES A. BUNCE Journal of Experimental Botany 1987. doi:10.1093/jxb/38.9.1413

Other claims from this paper (10)

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Relative translocation loss exceeded relative photosynthesis loss at every deficiency level.

Taxon: Sugarcanet0
Outcome: relative decrease in translocatione0
Direction: greatere0
Comparator: relative decrease in photosynthesise0

Verbatim

e0
“At all levels of deficiency, the relative decrease in translocation was greater than the relative decrease in photosynthesis”
✓ located verbatim in the source · abstract, characters 721–845

t0
“Sugarcane”
✓ located verbatim in the source · title, characters 79–88

Title

Effect of Potassium Deficiency upon Translocation of ¹⁴C in Detached Blades of Sugarcane

Constance E. Hartt PLANT PHYSIOLOGY 1970. doi:10.1104/pp.45.2.183

Other claims from this paper (10)

Intervention effect Potassium deprivation decreased basipetal translocation before visible symptoms.
Intervention effect Slight potassium deficiency decreased light translocation.
Intervention effect Slight potassium deficiency did not decrease dark translocation.
Intervention effect Severe potassium deficiency decreased translocation in darkness and light.
Intervention effect Potassium deficiency decreased translocation even where photosynthesis rates did not differ.
Intervention effect Potassium deficiency decreased translocation even without net carbon fixation.
Intervention effect Translocation was affected at potassium levels that did not affect photosynthesis.
Intervention effect Potassium deficiency decreased translocation more than moisture content.
Association Potassium decrease correlated better with translocation decrease than moisture decrease did.
Observation Radiophosphorus indicated disrupted stem phosphorylation under potassium deficiency.

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

No lower limit for photosynthesis is evident in the absorption spectra; some experiments down to 300 nm showed no decrease in absorption.

Taxon: FuchsiaFuchsiae1
Outcome: lower limit for photosynthesise5
Value: 300 nme6

Verbatim

e1
“The spectrum of a Fuchsia leaf”
✓ located verbatim in the source · abstract, characters 735–765

e5
“No evidence, however, is to be seen of a lower limit for photosynthesis”
✓ located verbatim in the source · abstract, characters 1442–1513

e6
“some experiments down to 300 nm still did not show a decrease of the absorption”
✓ located verbatim in the source · abstract, characters 1528–1607

Title

Leaf absorbance and photosynthesis

Schurer, Kees NASA STI Repository (National Aeronautics and Space Administration) 2018

Other claims from this paper (6)

Observationobservedoriginal resultmeasured

Claim · model-written summary

The drought decrease in wheat photosynthesis was similar across genotypes.

Taxon: wheatTriticum aestivume0 t0 e1 e2 e3 e4 e5
Material: genotypese0 t0 e1 e2 e3 e4 e5
Outcome: decrease in photosynthesise0 t0 e1 e2 e3 e4 e5
Direction: similare0 t0 e1 e2 e3 e4 e5

Verbatim

e0
“was similar between genotypes”
✓ located verbatim in the source · abstract, characters 1397–1426

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

“decrease of the photosynthesis”

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