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.

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.

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

The decrease in photosynthesis is attributed to non-stomatal factors.

Taxon: DendrobiumDendrobiumt0
Outcome: decrease of photosynthesise1
Qualifier: non-stomatal factorse1

Verbatim

t0
“Three Dendrobium Species”
✓ located verbatim in the source · title, characters 37–61

e1
“The data indicated that the decrease of photosynthesis is derived from non-stomatal factors”
✓ located verbatim in the source · abstract, characters 1114–1205

Title

Characteristics of Photosynthesis in Three Dendrobium Species Cultivated in Green House During Winter

Peng ZhenHua Xibei Linxueyuan xuebao 2009

Other claims from this paper (11)

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%.

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.

Associationobservedoriginal resultno effectmeasured

Claim · model-written summary

Net photosynthesis showed no obvious decrease as temperature rose.

Taxon: RiceOryza sativat0
Treatment: temperature risinge0
Outcome: net photosynthesise0
Direction: no obvious decreasee0

Verbatim

t0
“Rice”
✓ located verbatim in the source · title, characters 88–92

e0
“no obvious decrease pattern in net photosynthesis appeared along with the temperature rising”
✓ located verbatim in the source · abstract, characters 407–499

Title

Influence of High Temperature Stress on Net Photosynthesis, Dry Matter Partitioning and Rice Grain Yield at Flowering and Grain Filling Stages

Guo-hua LÜ; Yong-feng WU; Wen-bo BAI; et al. Journal of Integrative Agriculture 2013. doi:10.1016/s2095-3119(13)60278-6

Other claims from this paper (6)

Intervention effect High temperature changed dry matter allocation among leaf, sheath, culm and panicle.
Intervention effect Panicle dry weight decreased under high temperature stress.
Intervention effect Straw share of aboveground dry weight rose 6–34% from CK.
Intervention effect Grain yield fell significantly by 15 to 73% across heat treatments.
Intervention effect Heat at flowering affected grain yield more seriously than heat at grain filling.
Intervention effect High temperature stress negatively affected harvest index.

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.

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Calculations indicate slightly more than one-half of the decrease in photosynthesis in air is due to photorespiration and the remainder to oxygen inhibition of photosynthesis.

Taxon: SoybeanGlycine maxt0
Outcome: decrease in photosynthesis in aire0
Qualifier: photorespiratione0

Verbatim

e0
“slightly more than onehalf of the decrease in photosynthesis in air is due to photorespiration, and that the remainder is due to an oxygen inhibition of photosynthesis”
✓ located verbatim in the source · abstract, characters 867–1034

t0
“Soybean”
✓ located verbatim in the source · title, characters 20–27

Title

Varietal Effects in Soybean Photosynthesis and Photorespiration¹

P. E. Curtis; W. L. Ogren; R. H. Hageman Crop Science 1969. doi:10.2135/cropsci1969.0011183x000900030021x

Other claims from this paper (9)

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 interpretationoriginal resultmeasured

Claim · model-written summary

The decrease of diffusive conductance was more effective than the decrease of photosynthetic activity in lowering photosynthesis under high vapor pressure deficit.

Taxon: riceOryza sativat0
Treatment: high vapor pressure deficite6
Outcome: decrease of photosynthesise6
Qualifier: decreasing of diffusive conductance was more effectivee6

Verbatim

t0
“photosynthesis of rice leaves”
✓ located verbatim in the source · title, characters 36–65

e6
“the decreasing of diffusive conductance was more effective on the decrease of photosynthesis under high vapor pressure deficit than the decreasing of photosynthetic activity”
✓ located verbatim in the source · abstract, characters 2282–2455

Title

Effect of vapor pressure deficit on photosynthesis of rice leaves with reference to light and CO2 utilization efficiency.

Kuniyuki SAITOH; Kuni ISHIHARA Japanese Journal of Crop Science 1987. doi:10.1626/jcs.56.163

Other claims from this paper (12)

Intervention effect Transpiration rate increased rapidly as vapor pressure deficit changed from low to high.
Intervention effect Photosynthetic rate decreased as vapor pressure deficit changed from low to high.
Intervention effect Diffusive conductance decreased as vapor pressure deficit changed from low to high.
Intervention effect Intercellular CO2 concentration decreased as vapor pressure deficit changed from low to high.
Intervention effect Light utilization efficiency decreased under high vapor pressure deficit.
Intervention effect CO2 utilization efficiency decreased under high vapor pressure deficit.
Association Intercellular CO2 concentration decreased with photosynthetic rate and diffusive conductance under high vapor pressure deficit.
Intervention effect Under high vapor pressure deficit the slope between ambient CO2 and intercellular CO2 was smaller than under low vapor pressure deficit.
Association Photosynthetic rate is hyperbolically related to diffusive conductance.
Association Intercellular CO2 concentration is hyperbolically related to diffusive conductance.
Association Transpiration rate is linearly related to diffusive conductance.
Intervention effect Water use efficiency could be increased if diffusive conductance were decreased without decreasing mesophyll photosynthetic activity.

“decrease of the photosynthesis”

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