Search claims · PlantClaims

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Photosynthesis did not decrease through 87 moles per cubic meter NaCl under optimal assay conditions.

Taxon: cowpeaVigna unguiculatae0
Treatment: NaCl concentrations up to 87 moles per cubic metere1
Outcome: photosynthesise1
Direction: No decreasee1

Not reportedComparator

Verbatim

e0
“leaves of cowpea (Vigna unquiculata [L.] Walp.)”
✓ located verbatim in the source · abstract, characters 21–68

e1
“No decrease in photosynthesis was obtained for NaCl concentrations up to 87 moles per cubic meter in the plant growing media”
✓ located verbatim in the source · abstract, characters 500–624

Title

Salinity Effects on Photosynthesis in Isolated Mesophyll Cells of Cowpea Leaves

Z. Plaut; C. M. Grieve; E. Federman PLANT PHYSIOLOGY 1989. doi:10.1104/pp.91.2.493

Other claims from this paper (10)

Association CO2 fixation was maximal when isolation and assay osmotic potentials approached leaf osmotic potential.
Intervention effect Hypotonic and hypertonic media reduced photosynthesis regardless of growth salinity.
Intervention effect At 130 moles per cubic meter NaCl, photosynthesis fell only 30% under optimal assay conditions.
Observation Photosynthetic inhibition was reversible when saline stress was relieved.
Intervention effect At 173 moles per cubic meter NaCl, photosynthesis was severely and irreversibly inhibited.
Mechanism The severe photosynthetic inhibition was attributed to leaf chloride and sodium accumulation.
Observation Sorbitol uptake by intact cells was insignificant.
Association Sorbitol uptake was not associated with cell volume changes.
Observation Cells from low salinity grown plants had a light response curve similar to controls.
Intervention effect Cells grown at 173 moles per cubic meter NaCl reached light saturation at lower radiant flux density than lower salinity cells.

Mechanismobservedoriginal resultno effectmeasured

Claim · model-written summary

The decrease in photosynthesis with age was not due to mutual shading.

Taxon: Plantago lanceolataPlantago lanceolatat0
Outcome: decreasee6
Qualifier: not due to mutual shadinge6

Verbatim

e6
“this decrease was not due to mutual shading”
✓ located verbatim in the source · abstract, characters 751–794

t0
“Plantago lanceolata”
✓ located verbatim in the source · title, characters 21–40

Title

Energy metabolism of Plantago lanceolata as dependent on the supply of mineral nutrients

Hans Lambers; Freek Posthumus; Ineke Stulen; et al. Physiologia Plantarum 1981. doi:10.1111/j.1399-3054.1981.tb00883.x

Other claims from this paper (12)

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Photoinhibitory treatment beyond 2 h did not further decrease photosynthesis in soybean.

Taxon: soybeanGlycine maxe2
Treatment: photoinhibitory treatment for periods in excess of 2 he2
Outcome: photosynthesise2
Direction: did not cause a further decreasee2

Not reportedComparator

Verbatim

e2
“Exposure to the photoinhibitory treatment for periods in excess of 2 h did not cause a further decrease of photosynthesis in soybean”
✓ located verbatim in the source · abstract, characters 691–823

Title

Photoinhibition under Atmospheric O₂, the Activation State of RuBP Carboxylase and the Content of Photosynthetic Intermediates in Soybean and Wheat

DAVID A. WARD; BERT G. DRAKE Journal of Experimental Botany 1987. doi:10.1093/jxb/38.12.1937

Other claims from this paper (7)

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

Photosystem I electron transport showed no decrease in activity.

Taxon: spinachSpinacia oleraceae1
Organ / stage: chloroplastse1
Outcome: electron transport through photosystem Ie0
Direction: no decreasee0

Verbatim

e0
“electron transport through photosystem I operating on its own showed no decrease in activity”
✓ located verbatim in the source · abstract, characters 684–776

e1
“isolated spinach chloroplasts”
✓ located verbatim in the source · abstract, characters 203–232

Title

The effect of alpha terthienyl on photosynthesis

John Sinclair; Thor Arnason Canadian Journal of Botany 1982. doi:10.1139/b82-311

Other claims from this paper (2)

Intervention effect Alpha terthienyl plus near UV sensitized the Hill reaction in spinach chloroplasts.
Mechanism The authors infer inhibition near photosystem II and possibly in CO 2 fixation.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Kinetin did not counteract the long-term decrease in carbon fixation.

Taxon: CucumberCucumis sativust0
Treatment: kinetine0
Outcome: decrease in CO(2) fixatione0
Direction: not counteractede0

Not reportedComparator

Verbatim

e0
“the decrease in CO(2) fixation was not counteracted by kinetin”
✓ located verbatim in the source · abstract, characters 1233–1295

t0
“Cucumber”
✓ located verbatim in the source · title, characters 78–86

Title

Effect of Translocation-Hindering Procedures on Source Leaf Photosynthesis in Cucumber

Maria Luisa Mayoral; Zvi Plaut; Leonora Reinhold PLANT PHYSIOLOGY 1985. doi:10.1104/pp.77.3.712

Other claims from this paper (11)

Intervention effect Girdling temporarily reduced carbon fixation in cucumber leaves.
Intervention effect Girdling temporarily increased stomatal resistance.
Observation Girdled leaves temporarily developed a 5 to 10% water deficit.
Observation Girdled leaves had temporary increases in abscisic acid content.
Intervention effect Kinetin counteracted the effects of girdling.
Association Increasing the sink-source ratio increased carbon fixation after several days.
Association Decreasing the sink-source ratio decreased carbon fixation after several days.
Association Increasing sink-source ratio decreased starch content.
Association Decreasing sink-source ratio increased starch content.
Observation Sink manipulation changed the relative incorporation of carbon into photosynthetic products.
Observation Stomatal closure was not involved in the long-term fixation response.

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

Triose-phosphate and 3-phosphoglycerate did not decrease.

Taxon: WheatTriticum aestivume1
Outcome: triose-phosphate and 3-phosphoglyceratee0
Direction: No decreasee0

Verbatim

e0
“No decrease was found for triose-phosphate and 3-phosphoglycerate”
✓ located verbatim in the source · abstract, characters 1235–1300

e1
“Wheat (Triticum aestivum L. cv Albis)”
✓ located verbatim in the source · abstract, characters 0–37

Title

The Regulation of Photosynthesis in Leaves of Field-Grown Spring Wheat (Triticum aestivum L., cv Albis) at Different Levels of Ozone in Ambient Air

Berchtold Lehnherr; Felix Mächler; Ariane Grandjean; et al. PLANT PHYSIOLOGY 1988. doi:10.1104/pp.88.4.1115

Other claims from this paper (13)

Associationobservedoriginal resultno effectmeasured

Claim · model-written summary

SO2 did not greatly decrease activities of fructose 1,6-bisphosphatase and glyceraldehyde-3-phosphate dehydrogenase in either pea cultivar.

Taxon: Pisum sativumLathyrus oleraceuse0
Material: either cultivare4
Treatment: SO2e4
Gene: fructose l,6-bisphosphatase and glyceraldehyde-3-phosphate dehydrogenasee4
Outcome: activitiese4
Direction: did not decrease greatlye4

Verbatim

e0
“The response of several physiological parameters to exposure to SO2 (0·8 ppm and 0·6 ppm) was studied in two cultivars of Pisum sativum in which photosynthesis showed a different sensitivity to SO2”
✓ located verbatim in the source · abstract, characters 160–357

e4
“The activities of fructose l,6-bisphosphatase and glyceraldehyde-3-phosphate dehydrogenase did not decrease greatly in either cultivar, although activities of enzymes from the sensitive cultivar were more affected by SO2 than were those of the insensitive cultivar”
✓ located verbatim in the source · abstract, characters 760–1024

Title

The Basis for Different Sensitivities of Photosynthesis to SO₂in Two Cultivars of Pea

RUTH ALSCHER; JOHN L. BOWER; WARREN ZIPFEL Journal of Experimental Botany 1987. doi:10.1093/jxb/38.1.99

Other claims from this paper (7)

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

The quantum yield of photosynthesis at rate-limiting quantum flux was not affected.

Taxon: Pinus silvestrise0
Outcome: quantum yield of photosynthesise7
Qualifier: at rate limiting quantum fluxe7

Verbatim

e0
“Fumigations of 4–7 week old seelings of Pinus silvestris , with ca 400 μg SO 2 m ‐3 for 4–5 days resulted in a decrease both in net photosynthetic rate and in the levels of ribulose bisphosphate carboxylase activity of the primary needles”
✓ located verbatim in the source · abstract, characters 0–238

e7
“the quantum yield of photosynthesis at rate limiting quantum flux was not affected”
✓ located verbatim in the source · abstract, characters 826–908

Title

Effects of SO₂on photosynthesis and ribulose bisphosphate carboxylase in pine tree seedlings

Jan‐Erik Hällgren; Kerstin Gezelius Physiologia Plantarum 1982. doi:10.1111/j.1399-3054.1982.tb06319.x

Other claims from this paper (8)

Observationauthor interpretationoriginal resultno effectmeasured

Claim · model-written summary

Authors conclude leaf photosynthetic potential was not greatly reduced.

Taxon: SpinachSpinacia oleraceat0
Outcome: photosynthetic potential of the leafe0
Direction: does not result in any major decreasee0

Verbatim

e0
“salt stress does not result in any major decrease in the photosynthetic potential of the leaf”
✓ located verbatim in the source · abstract, characters 1510–1603

t0
“Spinach”
✓ located verbatim in the source · title, characters 84–91

Title

Photosynthesis and Ion Content of Leaves and Isolated Chloroplasts of Salt-Stressed Spinach

Simon P. Robinson; W. John S. Downton; Jenny A. Millhouse PLANT PHYSIOLOGY 1983. doi:10.1104/pp.73.2.238

Other claims from this paper (15)

Intervention effect Salt stress decreased shoot and root fresh and dry weight by more than 50%.
Observation Salt-stressed leaves were thicker.
Observation Salt-treated plants osmotically adjusted to maintain turgor.
Observation Leaf potassium decreased.
Observation Leaf sodium and chloride greatly increased.
Observation Photosynthesis differed by about 10% from controls on area or chlorophyll bases.
Observation Variable chlorophyll fluorescence yield was not affected.
Observation Stomatal conductance decreased 70%.
Observation Electron transport rates in chloroplasts and thylakoids were 10 to 20% below controls.
Observation Chloroplast CO2 dependent oxygen evolution decreased 20%.
Observation Chloroplast potassium decreased 50%.
Observation Chloroplast sodium increased 70%.
Observation Chloroplast chloride increased by less than 20%.
Mechanism Authors suggest stomatal conductance and leaf area may reduce actual photosynthesis.
Mechanism Authors suggest ion compartmentation may prevent inhibitory ion accumulation in chloroplasts.

Associationobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Reduced relative growth rate did not significantly affect adenylate energy charge.

Taxon: Lemna gibbaLemna gibbat0
Outcome: adenylate energy charge (EC)e0
Direction: did not significantly affecte0
Qualifier: decrease in relative growth ratee0

Not reportedMaterialGeneCompoundOrgan / stageInteractorTreatmentComparatorSetting

Verbatim

e0
“decrease in relative growth rate did not significantly affect the adenylate energy charge (EC)”
✓ located verbatim in the source · abstract, characters 928–1022

t0
“Lemna gibba”
✓ located verbatim in the source · title, characters 56–67

Title

Carbohydrate partitioning, photosynthesis and growth in Lemna gibba G3. II. Effects of phosphorus limitation

Björn Thorsteinsson; Jan‐Eric Tillberg Physiologia Plantarum 1987. doi:10.1111/j.1399-3054.1987.tb04341.x

Other claims from this paper (6)

“decrease of the photosynthesis”

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