Search claims · PlantClaims

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Calcium chloride pretreatment reduced the heat induced decrease in net photosynthesis.

Taxon: tobaccoNicotiana tabacumt0
Treatment: CaCl2 pretreatmente0
Outcome: net photosynthesis rate(Pn)e0
Direction: reduced the decreasee0

Not reportedComparator

Verbatim

e0
“Under heat stress,CaCl2 pretreatment greatly reduced the decrease in net photosynthesis rate(Pn) and maximum photochemical efficiency of PSⅡ(Fv/Fm).”
✓ located verbatim in the source · abstract, characters 623–771

t0
“tobacco”
✓ located verbatim in the source · title, characters 101–108

Title

Alleviative effects of exogenous CaCl2 on the inhibition of photosynthesis induced by heat stress in tobacco.

Wei Tan; Qingliang Li; Luo Yin; et al. Zhongguo nongye Kexue 2009

Other claims from this paper (6)

Intervention effect Calcium chloride pretreatment reduced the heat induced decrease in maximum PSII efficiency.
Intervention effect Calcium chloride alleviated heat damage to PSII electron transport and the oxygen evolving complex.
Intervention effect Calcium chloride enhanced SOD, POD, CAT and APX activities.
Intervention effect Calcium chloride reduced hydrogen peroxide accumulation.
Intervention effect Calcium chloride decreased MDA accumulation.
Intervention effect A 20 mmol·L-1 calcium chloride pretreatment gave the highest antioxidant enzyme activities and photosynthetic ability.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Removing all leaves except the fifth prevented a photosynthesis decrease when PPFD rose.

Treatment: all leaves except the investigated 5th leaf were removede0
Outcome: photosynthesise0
Direction: No decreasee0

Not reportedTaxonComparator

Verbatim

e0
“No decrease in photosynthesis was found if, when PPFD was increased, all leaves except the investigated 5th leaf were removed”
✓ located verbatim in the source · abstract, characters 686–811

Title

Photosynthesis and Light Activation of Ribulose 1,5-bisphosphate Carboxylase in the Presence of Starch

ANTON GRUB; FELIX MACHLER Journal of Experimental Botany 1990. doi:10.1093/jxb/41.10.1293

Other claims from this paper (12)

Intervention effect Photosynthesis decreased after PPFD increased.
Intervention effect Starch content increased after PPFD increased.
Observation Stimulation of photosynthesis at 2.0 kPa oxygen did not decline.
Observation The ratio of triose phosphate to 3-phosphoglycerate rose.
Observation Intercellular carbon dioxide partial pressure did not decrease.
Observation RuBP content did not decrease.
Observation Photosynthesis per unit initial RuBPCO activity decreased.
Association Growth-cabinet PPFD and leaf preconditioning PPFD affected initial RuBPCO activity.
Association Growth-cabinet PPFD and leaf preconditioning PPFD affected standard RuBPCO activity.
Mechanism The results suggest that a varying share of RuBPCO was membrane bound and insoluble in extracts.
Mechanism The comparison suggests membrane-bound RuBPCO did not contribute to photosynthetic carbon fixation.
Mechanism The authors propose membrane binding and release modulate actual RuBPCO activity in vivo.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Sunflower turgor and photosynthesis recovered as stomatal conductance began to decrease

Taxon: sunflowerHelianthus annuuse7
Outcome: recovery of turgor and photosynthesise6
Qualifier: as stomatal conductance began to decreasee6

Verbatim

e7
“for leaves of sunflower (Helianthus animus L.) grown at low PPFD, the increase in VPD led to leaf wilting and decreased photosynthesis”
✓ located verbatim in the source · abstract, characters 1088–1222

e6
“followed by recovery of turgor and photosynthesis as stomatal conductance began to decrease”
✓ located verbatim in the source · abstract, characters 1224–1315

Title

In-Phase Cycling of Photosynthesis and Conductance at Saturating Carbon Dioxide Pressure Induced by Increases in Water Vapour Pressure Deficit

JAMES A. BUNCE Journal of Experimental Botany 1987. doi:10.1093/jxb/38.9.1413

Other claims from this paper (10)

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The photosynthesis decrease under combined substrate acidity and UV-B was lower than under substrate acidity alone.

Taxon: radishesRaphanus sativuse1
Treatment: substrate acidity and UV-Be3
Outcome: decrease of the photosynthesise3
Direction: lowere3
Comparator: substrate acidity alonee3

Verbatim

e1
“growth of radishes (Raphanus sativus L.)”
✓ located verbatim in the source · abstract, characters 155–195

e3
“The decrease of the photosynthesis of radish plants treated with both investigated factors (substrate acidity and UV-B) were lower compared to the effect of substrate acidity alone”
✓ located verbatim in the source · abstract, characters 708–888

Title

Effects of substrate acidity and UV-B radiation on photosynthesis of radishes

Irena Januskaitiene Open Life Sciences 2011. doi:10.2478/s11535-011-0027-7

Other claims from this paper (3)

Intervention effect Radishes grown in an acidified pH 3.8 substrate showed the greatest inhibition of net photosynthesis.
Intervention effect UV-B radiation stimulated enzymatic reactions of photosynthesis and water use efficiency of radish plants grown in acidified peat substrates.
Intervention effect The investigated factors had a higher impact on tuber biomass than on foliage biomass in radishes.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Chronic acid fog suppressed a decrease in net photosynthesis through its nitrogen load.

Taxon: momi firAbies firmae1
Treatment: chronic acid fog exposuree0
Outcome: net photosynthesis ratee0
Direction: suppressed the decreasee0
Qualifier: nitrogen loade0

Not reportedComparator

Verbatim

e0
“chronic acid fog exposure suppressed the decrease in net photosynthesis rate, due to its nitrogen load.”
✓ located verbatim in the source · abstract, characters 1128–1231

e1
“momi fir (Abies firma Sieb. et Zucc.) trees”
✓ located verbatim in the source · abstract, characters 91–134

Title

Response of gas exchange rates inAbies firmaseedlings to various additional stresses under chronic acid fog stress

Koji Yoshida; Ryota Shibasaki; Chika Takami; et al. Journal of Forest Research 2004. doi:10.1007/s10310-003-0069-4

Other claims from this paper (5)

Observation Under chronic acid fog, momi fir seedlings opened stomata excessively in summer and closed them in winter.
Intervention effect Stomata of acid fog exposed fir seedlings tended to open under drought.
Intervention effect Ozone exposure visibly injured needles of acid fog exposed fir seedlings.
Mechanism Stomatal aperture regulated net photosynthesis in acid fog exposed fir seedlings.
Mechanism The authors infer that acid fog disturbs stomatal control in fir seedlings.

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Photosynthesis increased about two months after the stomatal-closure decrease, as rains returned.

Taxon: Central Amazon treese0
Treatment: rains returnede1
Outcome: photosynthesise1
Direction: increasee1

Verbatim

e0
“We assessed the effects of the recent (2015) strong El Niño drought on leaf-level photosynthesis of Central Amazon trees”
✓ located verbatim in the source · abstract, characters 281–401

e1
“Photosynthesis decrease due to stomatal closure during the 2015 extreme dry season was followed 2 months later by an increase in photosynthesis as rains returned”
✓ located verbatim in the source · abstract, characters 1437–1598

Title

Causes of reduced leaf‐level photosynthesis during strong El Niño drought in a Central Amazon forest

Victor Alexandre Hardt Ferreira dos Santos; Marciel José Ferreira; João Victor Figueiredo Cardoso Rodrigues; et al. Global Change Biology 2018. doi:10.1111/gcb.14293

Other claims from this paper (5)

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Chemlali showed greater tolerance to NaCl salinity than Koroneiki, without a comparable decrease in photosynthesis.

Taxon: Olea europaeaOlea europaeae0
Material: ‘Chemlali’e3
Outcome: tolerance to NaCl salinitye3
Direction: greatere3

Verbatim

e0
“the effects of salinity on the photosynthesis, water relations, mineral status, and enzymatic activity of two cultivars of Olea europaea L., ‘Chemlali’ and ‘Koroneiki’”
✓ located verbatim in the source · abstract, characters 301–468

e3
“‘Chemlali’ showed greater tolerance to NaCl salinity, based on a progressive decrease in osmotic potential (Ψπ) followed by a progressive and synchronous decrease in gs, without a comparable decrease in photosynthesis”
✓ located verbatim in the source · abstract, characters 774–991

Title

Physiological Responses of Two Olive Cultivars to Salt Stress

Olfa Boussadia; Hatem Zgallai; Nada Mzid; et al. Plants 2023. doi:10.3390/plants12101926

Other claims from this paper (6)

Intervention effect NaCl salinity negatively affected photosynthesis and stomatal conductance in both olive cultivars.
Association Salinity stress improved water use efficiency in olive trees.
Association The K+/Na+ ratio rose in Chemlali under salinity.
Association Glutathione peroxidase (GPX) accumulated in stressed olive plants.
Association Catalase (CAT) and ascorbate peroxidase (APX) content decreased in both stressed olive cultivars.
Association Koroneiki is more susceptible to salt stress than Chemlali.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The age-related decrease of net photosynthesis was delayed in solarised soil relative to control soil.

Taxon: plantsViridiplantaee3
Treatment: solarised soile3
Outcome: net photosynthesise3
Direction: delayede3
Qualifier: at near‐saturation light intensitye3
Comparator: the controle3

Verbatim

e3
“decrease of net photosynthesis at near‐saturation light intensity and of photochemical yield with ageing were delayed in plants growing in solarised soil as compared to the control”
✓ located verbatim in the source · abstract, characters 710–890

Title

Physiological and developmental aspects of increased plant growth in solarised soils

J. M. GRUENZWEIG; H. D. RABINOWITCH; J. KATAN Annals of Applied Biology 1993. doi:10.1111/j.1744-7348.1993.tb04059.x

Other claims from this paper (12)

Intervention effect Corn showed increased growth response in solarised soil relative to untreated soil.
Intervention effect Cucumber showed increased growth response in solarised soil relative to untreated soil.
Intervention effect Sorghum showed increased growth response in solarised soil relative to untreated soil.
Intervention effect Tobacco showed increased growth response in solarised soil relative to untreated soil.
Intervention effect Tomato showed increased growth response in solarised soil relative to untreated soil.
Observation In tomato seedlings, increased growth response occurred in shoots 15 days after transplanting and in roots two weeks later.
Intervention effect The third true tomato leaf had significantly higher chlorophyll and protein contents after soil solarisation than in controls.
Intervention effect Degradation of chlorophyll and protein was delayed with leaf aging in plants grown in solarised soil relative to controls.
Intervention effect The age-related decline of photochemical yield was delayed in solarised soil relative to control soil.
Intervention effect The ratio of variable to maximal chlorophyll fluorescence was independent of soil treatment and comparable to normal plant levels.
Association The authors concluded that initial increased growth response in solarised soil is independent of improved root growth.
Mechanism The authors interpreted delayed leaf senescence as contributing to increased growth response.

Mechanismhypothesisoriginal resultpositivebasis n/a

Claim · model-written summary

Zinc may decrease stomatal limitation of photosynthesis and improve photosynthetic capacity by increasing CA activity.

Taxon: Brassica oleracea L.Vat ItalicapBrassica oleraceae3
Treatment: zince3
Outcome: stomatal limitation of photosynthesise3
Qualifier: increasing CA activitye3

Verbatim

e3
“It was proposed that zinc could decrease stomatal limitation of photosynthesis in Brassica oleracea L.Vat Italicap leaves and improve the photosyn- thetic capacity by increasing CA activity”
✓ located verbatim in the source · abstract, characters 790–979

Title

Effects of Zinc on photosynthetic characteristics in leaves of Brassica oleracea L.Vat Italicap

Xie Min-hua; Zhang JiShu Journal of Lanzhou University 2008

Other claims from this paper (6)

Intervention effect Zinc at 0.5 mg/L increased chlorophyll a content by 8.72% relative to control plants.
Intervention effect Zinc at 0.5 mg/L increased chlorophyll b content by 10.17% relative to control plants.
Intervention effect Zinc at 0.5 mg/L increased carbonic anhydrase activity by 152.94% relative to control plants.
Intervention effect Zinc at 0.5 mg/L raised Pn, Gs and Ci in leaves relative to control plants.
Intervention effect Zinc at 0.5 mg/L increased apparent quantum yield by 12.14% relative to control leaves.
Intervention effect Zinc at 0.5 mg/L increased carboxylation efficiency by 7.05% relative to control leaves.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

AMF delayed drought induced photosynthesis decline or shifted it to lower soil water content.

Taxon: Artemisia tridentataArtemisia tridentatat0
Treatment: AMFe1
Interactor: AMFe1symbiont
Outcome: photosynthesise0
Direction: delayed the decreasee0

Not reportedComparator

Verbatim

e0
“delayed the decrease in photosynthesis caused by drought, or this decrease occurred at a lower soil water content”
✓ located verbatim in the source · abstract, characters 467–580

t0
“Artemisia tridentata”
✓ located verbatim in the source · title, characters 81–101

e1
“AMF inoculation”
✓ located verbatim in the source · abstract, characters 623–638

Title

Arbuscular Mycorrhizae Alter Photosynthetic Responses to Drought in Seedlings of Artemisia tridentata

Mathew Geisler; Sven Buerki; Marcelo D. Serpe Plants 2023. doi:10.3390/plants12162990

Other claims from this paper (8)

Intervention effect AMF colonization increased intrinsic water use efficiency under water stress in the greenhouse.
Intervention effect Field inoculation increased AMF colonization.
Observation Field seedlings showed water stress with water potentials from −2 to −4 MPa.
Observation Field seedlings had reduced stomatal conductance.
Observation Seedling survival remained high in the field.
Intervention effect Inoculation did not yield a difference in field water potentials.
Intervention effect Inoculation did not yield a difference in field survival.
Intervention effect A higher percentage of inoculated plants developed inflorescences.

“decrease of the photosynthesis”

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