Search claims · PlantClaims

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)

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.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Monuron caused the greatest decrease in apple net photosynthesis.

Taxon: apple treesMalus domesticae1
Material: ‘Golden Delicious’/M 7e1
Treatment: Monurone0
Outcome: Pne0
Direction: greatest decreasee0
Setting: greenhousee1

Not reportedComparator

Verbatim

e0
“Monuron caused the greatest decrease in Pn, followed by atrazine and simazine.”
✓ located verbatim in the source · abstract, characters 215–293

e1
“greenhouse grown ‘Golden Delicious’/M 7 apple trees ( Malus domestica Borkh.)”
✓ located verbatim in the source · abstract, characters 95–172

Title

Effect of Some Soil-applied Herbicides on Net Photosynthesis and Growth of Apple Trees1

Dharam P. Sharma; David C. Ferree; Fred O. Hartman HortScience 1977. doi:10.21273/hortsci.12.2.153

Other claims from this paper (6)

Intervention effect Atrazine decreased apple net photosynthesis, less than monuron.
Intervention effect Simazine decreased apple net photosynthesis, less than atrazine.
Intervention effect Diuron had no effect on apple net photosynthesis.
Intervention effect Monuron decreased the apple plastochron index.
Intervention effect Atrazine decreased the apple plastochron index.
Observation Herbicide effects on apple net photosynthesis appeared by day 10 and persisted through day 40.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

RMV infection decreased net canopy photosynthesis by about 50% at maximum.

Taxon: ryegrassesLoliumt0
Interactor: ryegrass mosaic virusRyegrass mosaic virust0pathogen
Outcome: net canopy photosynthesise0
Direction: decreasee0
Value: about 50%e0

Not reportedTreatmentComparator

Verbatim

e0
“decrease in net canopy photosynthesis (maximum decrease about 50%)”
✓ located verbatim in the source · abstract, characters 431–497

t0
“ryegrass mosaic virus on carbon assimilation and growth of ryegrasses”
✓ located verbatim in the source · title, characters 14–83

Title

The effect of ryegrass mosaic virus on carbon assimilation and growth of ryegrasses

M. B. JONES; A. J. HEARD; JANE WOLEDGE; et al. Annals of Applied Biology 1977. doi:10.1111/j.1744-7348.1977.tb01904.x

Other claims from this paper (4)

Intervention effect RMV infection usually reduced dry matter yield in ryegrass swards.
Intervention effect Dark respiration increased by about 50% at maximum in RMV infected swards.
Intervention effect RMV infection decreased tillering by about 30% at maximum.
Intervention effect RMV infection lowered leaf area index.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Slower cucumber growth correlated with decreased photosynthesis and respiration.

Taxon: cucumber plantsCucumis sativuse1
Outcome: growthe0
Direction: slowdowne0
Qualifier: decrease of photosynthesis as well as of respiratione0

Verbatim

e0
“the slowdown of growth was correlated with the decrease of photosynthesis as well as of respiration”
✓ located verbatim in the source · abstract, characters 760–859

e1
“cucumber plants”
✓ located verbatim in the source · abstract, characters 312–327

Title

Direct digital control of plant growth. II

Tadashi TAKAKURA; Genji OHARA Journal of Agricultural Meteorology 1976. doi:10.2480/agrmet.32.107

Other claims from this paper (4)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

A slight decrease in apparent photosynthesis was observed even at 0.1 ppm ozone.

Taxon: corn, rice and peanut plantsArachis hypogaea Oryza sativaZea mays subsp. mayse1
Treatment: 0.1 ppme2
Outcome: Apparent photosynthesise0
Direction: slight decreasee2

Not reportedComparator

Verbatim

e0
“Apparent photosynthesis of 3 kinds of plant used in this experiment decreased to a considerable extent when exposed to a higher concentration than 0.5 ppm”
✓ located verbatim in the source · abstract, characters 372–526

e1
“the visible injuries to corn, rice and peanut plants”
✓ located verbatim in the source · abstract, characters 318–370

e2
“although a slight decrease was observed even at 0.1 ppm”
✓ located verbatim in the source · abstract, characters 528–583

Title

Studies on the Mechanism of Injurious Effects of Toxic Gases on Crop plants : XIII. Effects of ozone in the air on the apparent photosynthesis of corn, rice and peanut plants

Tetsuro TANIYAMA; Kazumi YAMASHITA; Tonao KOIKE Japanese Journal of Crop Science 1976. doi:10.1626/jcs.45.9

Other claims from this paper (10)

Intervention effect Apparent photosynthesis of corn, rice and peanut decreased markedly at ozone above 0.5 ppm.
Intervention effect Ozone-lowered photosynthesis rate and its extent followed the order peanut > rice > corn.
Observation Visible injury followed the same order: peanut > rice > corn.
Intervention effect Photosynthesis of corn did not fully recover within 2 hours after ozone treatment stopped.
Intervention effect Photosynthesis of rice showed a clear trend to recover after ozone treatment stopped.
Intervention effect Photosynthesis of peanut did not recover and kept decreasing for 1 hour after ozone treatment stopped.
Observation Peanut photosynthesis decreased in proportion to the increase in visible injury.
Observation Visible injuries appeared in rice when photosynthesis had decreased by 70%.
Observation Visible injuries appeared in corn when photosynthesis had decreased by 65%.
Observation Degrees of invisible injury, judged from photosynthetic rate under ozone, ranked rice > corn > peanut.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Kaolin coating reduced sorghum net photosynthesis by 23%.

Taxon: sorghumSorghume1
Treatment: kaolin coatinge0
Outcome: net photosynthesise0
Direction: decreasee0
Value: 23%e0

Not reportedComparator

Verbatim

e0
“the kaolin coating caused a 23% decrease of net photosynthesis”
✓ located verbatim in the source · abstract, characters 377–439

e1
“sorghum leaves”
✓ located verbatim in the source · abstract, characters 349–363

Title

Effect of Increasing Foliage Reflectance on the CO2 Uptake and Transpiration Resistance of a Grain Sorghum Crop¹

S. Moreshet; G. Stanhill; M. Fuchs Agronomy Journal 1977. doi:10.2134/agronj1977.00021962006900020013x

Other claims from this paper (6)

Intervention effect Kaolin coating reduced solar radiation absorption by 26% immediately after spraying.
Observation The photosynthesis reduction persisted for weeks and was larger six weeks after the last kaolin application.
Intervention effect Kaolin-coated leaves showed enhanced senescence.
Intervention effect Kaolin-coated leaves had only minor reductions in leaf surface diffusion resistance.
Mechanism Authors attribute the reduced photosynthesis to lower light absorption and enhanced senescence.
Intervention effect Kaolin-treated sorghum had increased grain yield.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Initially RuDP carboxylase activity declined faster than net photosynthesis.

Taxon: wheatTriticum aestivume1
Outcome: RuDP carboxylase activitye0
Direction: decreasee0
Comparator: net photosynthesise0

Verbatim

e0
“Initially the decrease in RuDP carboxylase activity was greater than the decline in net photosynthesis.”
✓ located verbatim in the source · abstract, characters 187–290

e1
“flag leaves of wheat on the plant”
✓ located verbatim in the source · abstract, characters 152–185

Title

Ribulose-1,5-Diphosphate Carboxylase Protein during Flag Leaf Senescence

NIGEL P. HALL; ALFRED J. KEYS; MICHAEL J. MERRETT Journal of Experimental Botany 1978. doi:10.1093/jxb/29.1.31

Other claims from this paper (5)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Under drought, the decrease in net photosynthesis was greater in the drought-susceptible pea cultivar.

Taxon: Pisum sativumLathyrus oleraceuse0
Material: drought.susceptible cultlvare3
Outcome: net photosynthesise3
Direction: greatere3

Verbatim

e0
“Physiological effects of drought were studied in two pea ( Pisum sativum L.) cultivars”
✓ located verbatim in the source · abstract, characters 0–86

e3
“Decreases in dry weight, carbohydrate concentration, enzyme activity, and net photosynthesis were greater in the drought.susceptible cultlvar”
✓ located verbatim in the source · abstract, characters 418–559

Title

Effects of Drought Stress and Succinic Acid‐2,2‐Dimethylhydrazide Treatment on Water Relations and Photosynthesis in Pea Seedlings¹

K. C. Lee; R. W. Campbell; G. M. Paulsen Crop Science 1974. doi:10.2135/cropsci1974.0011183x001400020033x

Other claims from this paper (11)

Intervention effect Drought stress decreased dry weight and relative turgidity in two pea cultivars.
Intervention effect Drought stress decreased reducing sugar, sucrose and starch concentrations in pea.
Intervention effect Drought stress decreased ribulose-1,5-bisphosphate carboxylase activity in pea.
Intervention effect Drought stress decreased net photosynthesis in pea.
Association Under drought, the decreases in dry weight, carbohydrate concentration and enzyme activity were greater in the drought-susceptible pea cultivar.
Intervention effect SADH treatment increased relative turgidity and ribulose-1,5-bisphosphate carboxylase activity under drought stress in pea.
Intervention effect SADH treatment decreased respiration and rate of water uptake in both pea cultivars under nonstress conditions.
Intervention effect SADH treatment increased sucrose concentration in the Alaska pea cultivar.
Intervention effect SADH treatment decreased net photosynthesis in the Hardy pea cultivar.
Intervention effect SADH had no effect on reducing sugar and starch concentrations in pea.
Mechanism SADH probably enabled pea plants to tolerate stress longer by decreasing energy requirements and metabolic degradation rates.

“decrease of the photosynthesis”

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