Search claims · PlantClaims

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

At lower light, root cooling did not decrease whole-plant photosynthesis.

Taxon: Artemisia tridentataArtemisia tridentatat0
Treatment: root coolinge0
Outcome: A of the whole plante0
Direction: did not cause a decreasee0
Qualifier: lower PPFDe0

Not reportedComparator

Verbatim

e0
“At lower PPFD, root cooling did not cause a decrease in A of the whole plant”
✓ located verbatim in the source · abstract, characters 1218–1294

t0
“Artemisia tridentata”
✓ located verbatim in the source · title, characters 44–64

Title

Effect of Root Cooling on Photosynthesis of Artemisia tridentata Seedlings under Different Light Levels

H. BassiriRad; M. M. Caldwell; K. A. Mott Botanica Acta 1993. doi:10.1111/j.1438-8677.1993.tb00744.x

Other claims from this paper (9)

Intervention effect Root cooling reduced whole-plant net photosynthesis by 25% at high light.
Intervention effect Root cooling reduced stomatal conductance by more than 50% before photosynthesis declined.
Intervention effect Root cooling reduced intercellular CO2 concentration by about 10% at high light.
Intervention effect Photosynthesis versus intercellular CO2 curves did not differ between cold and warm soil.
Intervention effect Stomatal conductance was lower at the lower soil temperature.
Intervention effect Root cooling lowered leaf relative water content by as much as 23%.
Mechanism The authors inferred that cooling limited photosynthesis through stomatal closure linked to lower water supply.
Intervention effect At lower light, root cooling moderately reduced stomatal conductance, intercellular CO2 and relative water content.
Intervention effect Cold soil rapidly and substantially reduced root respiration at either light level.

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

Infection did not decrease photosynthesis in any fifth leaves versus controls.

Taxon: oatsAvena sativat0
Organ / stage: fifth leavese0
Interactor: Erysiphe graminis D.c. ex Merat f. sp. avenae MarchalBlumeria avenaet0pathogen
Outcome: rate of photosynthesise1
Direction: no decreasee0
Comparator: controlse0

Verbatim

e0
“no decrease in any of the fifth leaves relative to controls”
✓ located verbatim in the source · abstract, characters 434–493

e1
“rate of photosynthesis”
✓ located verbatim in the source · abstract, characters 361–383

t0
“oats exhibiting different levels of partial resistance to Erysiphe graminis D.c. ex Merat f. sp. avenae Marchal”
✓ located verbatim in the source · title, characters 34–145

Title

Respiration and photosynthesis in oats exhibiting different levels of partial resistance to Erysiphe graminis D.c. ex Merat f. sp. avenae Marchal

G. R. HAIGH; T. L. W. CARVER; A. P. GAY; et al. New Phytologist 1991. doi:10.1111/j.1469-8137.1991.tb01016.x

Other claims from this paper (9)

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

Infection generally did not decrease photosynthesis, except in second leaves of one genotype.

Taxon: oatsAvena sativat0
Organ / stage: second leavese0
Interactor: Erysiphe graminis D.c. ex Merat f. sp. avenae MarchalBlumeria avenaet0pathogen
Outcome: rate of photosynthesise0
Direction: no decreasee0

Verbatim

e0
“There was no decrease in the rate of photosynthesis, except in the second leaves of one genotype”
✓ located verbatim in the source · abstract, characters 332–428

t0
“oats exhibiting different levels of partial resistance to Erysiphe graminis D.c. ex Merat f. sp. avenae Marchal”
✓ located verbatim in the source · title, characters 34–145

Title

Respiration and photosynthesis in oats exhibiting different levels of partial resistance to Erysiphe graminis D.c. ex Merat f. sp. avenae Marchal

G. R. HAIGH; T. L. W. CARVER; A. P. GAY; et al. New Phytologist 1991. doi:10.1111/j.1469-8137.1991.tb01016.x

Other claims from this paper (9)

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Increasing salinity did not decrease photosynthesis in ammonium-fed sunflower.

Taxon: sunflowerHelianthus annuust0
Treatment: increase in salinisatione0
Outcome: photosynthesis ratee0
Direction: note0

Not reportedComparator

Verbatim

e0
“with increase in salinisation the photosynthesis rate decreased in NO 3 ‐ ‐supplied plants, but not in those given NH 4 +”
✓ located verbatim in the source · abstract, characters 1185–1306

t0
“sunflower (Helianthus annum L.)”
✓ located verbatim in the source · title, characters 110–141

Title

Interactive effect of salt (NaCl) and nitrogen form on growth, water relations and photosynthetic capacity of sunflower (Helianthus annum L.)

M. ASHRAF Annals of Applied Biology 1999. doi:10.1111/j.1744-7348.1999.tb00881.x

Other claims from this paper (10)

Intervention effect Under nonsaline conditions nitrate-fed sunflower had greater shoot and root fresh weight and leaf area than ammonium-fed plants.
Intervention effect NaCl inhibited growth more in nitrate-fed than ammonium-fed sunflower.
Intervention effect Leaf water and osmotic potentials were lower with ammonium than nitrate under saline and nonsaline conditions.
Intervention effect Leaf chlorophyll a and b concentrations were higher with ammonium than nitrate at the lower two salinity levels.
Intervention effect Nitrate-fed sunflower had higher photosynthesis than ammonium-fed plants without salinity.
Intervention effect Increasing salinity decreased photosynthesis in nitrate-fed sunflower.
Intervention effect Salinity significantly increased transpiration in nitrate-fed sunflower.
Intervention effect Under nonsaline conditions stomatal conductance was higher with nitrate than ammonium.
Observation Nitrate-fed sunflower had better water-use efficiency than ammonium-fed plants without salinity but worse efficiency with salinity.
Intervention effect Nitrogen form and NaCl did not affect relative intercellular CO2 concentration.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Six species showed almost no photosynthesis decrease even at pH 2.5.

Taxon: オオイヌタデe0
Treatment: pH 2.5e0
Outcome: 光合成速度e1
Direction: ほとんど低下しなかったe0

Not reportedComparator

Verbatim

e0
“pH 2.5でもほとんど低下しなかったオオイヌタデ, シロザ, メヒシバ, ソバ, イネおよびトールフェスク”
✓ located verbatim in the source · abstract, characters 256–310

e1
“人工酸性雨のpHと光合成速度の変化との関係”
✓ located verbatim in the source · abstract, characters 142–163

Title

Effect of Simulated Acid Rain on the Physiological Activities and Chlorophyll Content of Leaves in Some Weeds and Crops

Mitsumasa Satoh Journal of Weed Science and Technology 1997. doi:10.3719/weed.41.310

Other claims from this paper (7)

Intervention effect At pH 3.0 photosynthesis fell significantly in radish and common bean.
Intervention effect At pH 2.5 photosynthesis fell significantly in fleabane and white clover.
Intervention effect Leaf respiration increased in most species compared with controls.
Intervention effect Acid rain spraying caused little change in stomatal conductance in four measured species.
Association Leaf chlorophyll a and b tended to decline as acid rain pH fell.
Intervention effect At pH 2.5 chlorophyll content fell over 10% in all species except crabgrass and tall fescue.
Association Relative chlorophyll a content and relative photosynthetic rate had a linear regression relationship.

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

The rate of photosynthesis in spinach did not decrease until leaf water potential fell below -1.0 MPa in short- and long-term water stress.

Taxon: Spinacia oleraceaSpinacia oleraceae0
Outcome: rate of photosynthesise1
Qualifier: until leaf water potential decreased belowe1

Verbatim

e0
“photosynthetic carbon metabolism in spinach ( Spinacia oleracea L.)”
✓ located verbatim in the source · abstract, characters 40–107

e1
“the rate of photosynthesis in saturating CO 2 did not decrease until leaf water potential decreased below”
✓ located verbatim in the source · abstract, characters 411–516

Title

Comparison of the effect of rapidly and gradually developing water‐stress on carbohydrate metabolism in spinach leaves

R. ZRENNER; M. STITT Plant Cell & Environment 1991. doi:10.1111/j.1365-3040.1991.tb00963.x

Other claims from this paper (7)

Intervention effect At smaller water deficits, starch synthesis in spinach leaves was inhibited.
Intervention effect At smaller water deficits, sucrose synthesis in spinach leaves remained constant or increased.
Intervention effect Water-stressed spinach leaves had a two- to three-fold higher sucrose content at the end of the night than non-stressed leaves.
Intervention effect Water-stressed spinach leaves contained less starch than non-stressed leaves.
Observation In spinach leaves held in the dark, starch was not mobilized until sucrose had decreased to a low level.
Observation In water-stressed spinach leaves, starch mobilization began at a two-fold higher sucrose content.
Association Water stress was accompanied by an increase in activation of sucrose-phosphate synthase in spinach leaves.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Three days after the CO2 decrease, net photosynthesis of Ficus benjamina reached the same level as at high CO2.

Taxon: Ficus benjaminaFicus benjaminae2
Treatment: A decrease in the CO2 concentration from 700 to 350 μmol mol−1e3
Outcome: photosynthesise3
Direction: reached the same levele4
Comparator: high CO2e4

Verbatim

e2
“Ficus benjamina L., cultivar Cleo”
✓ located verbatim in the source · abstract, characters 43–76

e3
“A decrease in the CO2 concentration from 700 to 350 μmol mol−1after six days at high CO2 first significantly decreased the photosynthesis”
✓ located verbatim in the source · abstract, characters 810–947

e4
“but three days later it reached the same level as that at high CO2”
✓ located verbatim in the source · abstract, characters 949–1015

Title

Diurnal Photosynthesis and Transpiration ofFicus benjaminaL. as Affected by Length of Photoperiod, CO₂Concentration and Light Level

Leiv M. Mortensen Acta Agriculturae Scandinavica Section B - Soil & Plant Science 1992. doi:10.1080/09064719209410206

Other claims from this paper (8)

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

No decrease in the responsiveness of photosynthesis to CO2 enrichment over time was detected.

Taxon: Liriodendron tulipiferaLiriodendron tulipiferae1
Outcome: responsiveness of photosynthesis to CO2 enrichment over timee6

Verbatim

e1
“Responses of photosynthesis and stomatal conductance were monitored throughout a 3‐year field exposure of Liriodendron tulipifera (yellow‐poplar) and Quercus alba (white oak) to elevated concentrations of atmospheric CO 2”
✓ located verbatim in the source · abstract, characters 9–230

e6
“No decrease in the responsiveness of photosynthesis to CO2 enrichment over time was detected”
✓ located after whitespace/quote normalisation · abstract, characters 597–690

Title

Foliar gas exchange responses of two deciduous hardwoods during 3 years of growth in elevated CO₂: no loss of photosynthetic enhancement

C. A. GUNDERSON; R. J. NORBY; S. D. WULLSCHLEGER Plant Cell & Environment 1993. doi:10.1111/j.1365-3040.1993.tb00501.x

Other claims from this paper (8)

Intervention effect Exposure to +150 and +300 umol/mol CO2 increased net photosynthesis by 12-144% over the study.
Intervention effect Net photosynthesis was consistently higher at +300 than at +150 umol/mol CO2.
Intervention effect The effect of CO2 enrichment on stomatal conductance was limited.
Intervention effect Instantaneous leaf-level water use efficiency increased significantly under CO2 enrichment.
Observation Photosynthetic capacity and carboxylation efficiency were not altered by growth at elevated CO2.
Observation No alteration was detected in the timing of leaf senescence or abscission under elevated CO2.
Mechanism Leaf-level photosynthesis is suggested not to down-regulate as a result of acclimation to CO2 enrichment in the field.
Observation Responses were consistent throughout the canopy and across successive growth flushes and seasons.

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

Protected spruce twigs showed no decrease in photosynthesis or transpiration over four weeks.

Taxon: spruce treesPiceae0
Organ / stage: Twigse0
Treatment: prevented from contact with the exhaust emissionse0
Outcome: photosynthetic or transpiration ratese0
Direction: did not show any decreasee0
Qualifier: within four weekse0

Verbatim

e0
“Twigs from exposed spruce trees, which had been prevented from contact with the exhaust emissions, did not show any decrease of photosynthetic or transpiration rates within four weeks.”
✓ located verbatim in the source · abstract, characters 230–414

Title

Independent photosynthetic response of exposed and unexposed twigs of the same spruce tree to car exhaust

A. Ziegler‐Jöns; H. Kammerbauer; S. Drenkard; et al. European Journal of Forest Pathology 1990. doi:10.1111/j.1439-0329.1990.tb01150.x

Other claims from this paper (2)

Observation Chlorophyll fluorescence in protected twigs was unaffected.
Observation Chlorophyll fluorescence was severely impaired in exhaust-exposed twigs.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Striga infection did not decrease host photosynthesis at 67 or 79 days.

Taxon: Sorghum bicolor (L.) MoenchSorghum bicolort0
Treatment: S. hermonthica infectione0
Interactor: S. hermonthicaStriga hermonthicae0parasite
Outcome: host photo-synthesise0
Direction: did not decreasee0
Qualifier: 67 or 79 DASe0

Not reportedComparator

Verbatim

e0
“S. hermonthica infection did not decrease host photo-synthesis, transpiration and water use efficiency 67 or 79 DAS.”
✓ located verbatim in the source · abstract, characters 368–484

t0
“Sorghum bicolor (L.) Moench host”
✓ located verbatim in the source · abstract, characters 117–149

Title

The effect ofStriga hermonthica(Del.) Benth. infection on gas-exchange characteristics and yield of a sorghum host, measured in the field in Mali

Lawrence J. Clark; Keith G. Shawe; Gŕrard Hoffmann; et al. Journal of Experimental Botany 1994. doi:10.1093/jxb/45.2.281

Other claims from this paper (4)

Intervention effect Striga infection significantly reduced sorghum grain yield at harvest.
Intervention effect Striga infection significantly reduced sorghum straw yield at harvest.
Intervention effect Striga infection did not decrease host transpiration at 67 or 79 days.
Intervention effect Striga infection did not decrease host water use efficiency at 67 or 79 days.

“decrease of the photosynthesis”

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