Search claims · PlantClaims

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.

Intervention effectobservedreview summarynegativemeasured

Claim · model-written summary

SXD1-deficient plants were unable to decrease the expression of genes essential for photosynthesis.

Taxon: SXD1-deficient plantse4
Treatment: SXD1-deficiente4
Outcome: expression of genes essential for photosynthesise4
Direction: unable to decreasee4

Not reportedComparator

Verbatim

e4
“Rather, SXD1-deficient plants were unable to decrease the expression of genes essential for photosynthesis”
✓ located verbatim in the source · abstract, characters 548–654

Title

Chloroplast to Nucleus Feedback by SXD1

Science s STKE 2001. doi:10.1126/stke.2001.82.tw3

Other claims from this paper (6)

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 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.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The decrease in whole-plant photosynthesis with increasing EC was caused by decreased leaf area, not by reduced leaf photosynthesis.

Taxon: tomatoSolanum lycopersicume0
Material: Celebrity' and `Countere0
Treatment: an increase in ECe1
Outcome: whole plant photosynthesise1
Qualifier: decreased leaf areae1

Verbatim

e0
“whole `Celebrity' and `Counter' tomato [ Lycopersicon esculentum (L.) Mill.] plants”
✓ located verbatim in the source · abstract, characters 320–403

e1
“The decrease in whole plant photosynthesis with an increase in EC was caused by decreased leaf area but not by a decrease in leaf photosynthesis”
✓ located verbatim in the source · abstract, characters 1262–1406

Title

Growth and Photosynthetic Response of Tomato to Nutrient Solution Concentration at Two Light Levels

D. Schwarz; H.-P. Kläring; M.W. van Iersel; et al. Journal of the American Society for Horticultural Science 2002. doi:10.21273/jashs.127.6.984

Other claims from this paper (7)

Intervention effect Increasing PPF enhanced tomato growth and photosynthesis.
Intervention effect Increasing EC diminished tomato growth and photosynthesis.
Intervention effect Each EC increase reduced tomato dry weight by 1.9% to 7.3%.
Intervention effect Each EC increase reduced whole-plant photosynthesis by 1.7% to 4.5%.
Intervention effect Increasing EC did not decrease dry matter content or leaf photosynthesis.
Observation Mean plant dry matter content of tomato ranged between 70 and 95 g·kg-1.
Observation Net leaf photosynthesis on the last measurement day ranged between 7.5 and 11.3 μmol·m -2 ·s -1.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

The afternoon decrease in net photosynthesis was associated with depressed ΦPS2 under high PPFD.

Taxon: grapevineVitist0
Outcome: PNe0
Direction: decreasee0
Comparator: ΦPS2e0

Verbatim

e0
“decrease in PN after midday under saturating PPFD was also associated with the observed depression of ΦPS2 at high PPFD”
✓ located verbatim in the source · abstract, characters 709–828

t0
“grapevine”
✓ located verbatim in the source · title, characters 71–80

Title

Stomatal and non-stomatal limitations to photosynthesis in field-grown grapevine cultivars

D. J. Yu; S. J. Kim; H. J. Lee Biologia Plantarum 2009. doi:10.1007/s10535-009-0019-x

Other claims from this paper (7)

Observation Net photosynthetic rate increased in the morning.
Observation Net photosynthesis saturated at PPFD 1200 to 1500 between 10:00 and 12:00.
Observation Net photosynthesis decreased after midday.
Observation Maximum net photosynthesis in Campbell Early was 13.7 µmol m-2 s-1.
Observation Maximum net photosynthesis in Kyoho was 12.5 µmol m-2 s-1.
Association Stomatal conductance and transpiration changed in parallel with net photosynthesis.
Mechanism The authors suggest afternoon vapour pressure deficit may contribute to declining gs and PN.

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Cadmium-associated growth inhibition accompanied a significant decrease in net photosynthesis.

Taxon: B. schmidtiiBetula schmidtiie0
Treatment: Cd treatmente1
Outcome: net photosynthesis measured as $CO_2$ assimilatione0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“the growth inhibition of B. schmidtii seedlings was accompanied by a significant decrease in net photosynthesis measured as $CO_2$ assimilation”
✓ located verbatim in the source · abstract, characters 1108–1251

e1
“Cd treatment levels of three families”
✓ located verbatim in the source · abstract, characters 798–835

Title

Differences in Growth and Photosynthesis among Three Half-sib Families of Betula schmidtii in Response to Cd Treatment

;;;; The Korean Journal of Ecology 2004. doi:10.5141/jefb.2004.27.3.147

Other claims from this paper (4)

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The decrease of photosynthesis was caused by a non-stomatal factor under two-year continuous cropping.

Taxon: Opium poppyPapaver somniferume0
Treatment: continuous cropping for two yearse3
Outcome: decrease of photosynthesise3
Direction: decreasee3
Qualifier: non-stomatal factore3

Verbatim

e0
“The photosynthesis physiological and ecological parameter of leaf were measured at the fruit rapid-swelling stage of Opium poppy”
✓ located verbatim in the source · abstract, characters 0–128

e3
“The decrease of photosynthesis was caused by stomatal factor with the normally cropping,alternation cropping and continuous cropping for four years, and by non-stomatal factor with the continuous cropping for two years”
✓ located after whitespace/quote normalisation · abstract, characters 587–804

Title

Effect of continuous cropping on photosynthesis diurnal changes of Opium poppy

Lili Wang 2007

Other claims from this paper (6)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

In soybean leaves, photosynthesis decreased after NaCl concentration reached 40 mmol·L-1, with a decrease of CO2 assimilation rate as a major factor.

Taxon: soybeanGlycine maxe1
Treatment: NaCl concentration reached 40 mmol·L-1e1
Outcome: photosynthesise1
Direction: decreasee1
Qualifier: the decrease of the CO2 assimilation rate was a major factore1

Verbatim

e1
“when NaCl concentration reached 40 mmol·L-1,the decrease of the CO2 assimilation rate was a major factor for the decrease of the photosynthesis in the soybean leaves after salt stress”
✓ located verbatim in the source · abstract, characters 203–386

Title

Effects of Short-term NaCl Stress on Photosynthesis in Leaves of Glycine soja and Glycine max

Huiyuan Gao Dadou kexue 2009

Other claims from this paper (3)

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The decrease of photosynthesis was caused by a stomatal factor under normal, alternation and four-year continuous cropping.

Taxon: Opium poppyPapaver somniferume0
Treatment: normally cropping,alternation cropping and continuous cropping for four yearse3
Outcome: decrease of photosynthesise3
Direction: decreasee3
Qualifier: stomatal factore3

Verbatim

e0
“The photosynthesis physiological and ecological parameter of leaf were measured at the fruit rapid-swelling stage of Opium poppy”
✓ located verbatim in the source · abstract, characters 0–128

e3
“The decrease of photosynthesis was caused by stomatal factor with the normally cropping,alternation cropping and continuous cropping for four years, and by non-stomatal factor with the continuous cropping for two years”
✓ located after whitespace/quote normalisation · abstract, characters 587–804

Title

Effect of continuous cropping on photosynthesis diurnal changes of Opium poppy

Lili Wang 2007

Other claims from this paper (6)

“decrease of the photosynthesis”

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