Search claims · PlantClaims

Mechanismauthor interpretationreview summarynegativebasis n/a

Claim · model-written summary

Leaf rust defoliation can decrease photosynthesis.

Taxon: southern highbush blueberriese1
Outcome: photosynthesise0
Direction: decreasee0
Qualifier: defoliatione0

Verbatim

e0
“Severe leaf rust causes defoliation in the fall or early winter, which can decrease floral bud differentiation, photosynthesis, and the next season’s fruit yield”
✓ located verbatim in the source · abstract, characters 151–312

e1
“southern highbush blueberries”
✓ located verbatim in the source · abstract, characters 37–66

Title

Leaf Rust Disease of Southern Highbush Blueberry in Florida

Philip F. Harmon; Christ Mane Belizaire; Douglas A. Phillips EDIS 2025. doi:10.32473/edis-pp385-2025

Other claims from this paper (4)

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The authors attribute the initial photosynthetic decrease to stomatal closure.

Taxon: potatoSolanum tuberosumt0
Interactor: V. dahliaeVerticillium dahliaee0pathogen
Outcome: initial decrease in photosynthesise0
Qualifier: stomatal closuree0

Verbatim

e0
“the initial decrease in photosynthesis caused by V. dahliae was caused by stomatal closure”
✓ located verbatim in the source · abstract, characters 421–511

t0
“Mechanism of Photosynthesis Decrease by Verticillium dahliae in Potato”
✓ located verbatim in the source · title, characters 0–70

Title

Mechanism of Photosynthesis Decrease by Verticillium dahliae in Potato

Robert L. Bowden; Douglas I. Rouse; Thomas D. Sharkey PLANT PHYSIOLOGY 1990. doi:10.1104/pp.94.3.1048

Other claims from this paper (7)

Intervention effect Infected symptomless potato leaves had reduced carbon assimilation, stomatal conductance and intercellular CO(2).
Intervention effect Infection did not increase dark respiration.
Intervention effect Infection did not change the assimilation versus intercellular CO(2) relation.
Intervention effect Infection did not change light use efficiency at constant intercellular CO(2).
Observation Patchiness in carbon assimilation was found at low frequency.
Association Low stomatal conductance correlated with low leaf water potentials.
Intervention effect Infection did not affect leaf osmotic potential.

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 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)

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.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Acidity explained only part of the photosynthesis decrease.

Taxon: tobaccoNicotiana tabacumt0
Interactor: S. sclerotiorumSclerotinia sclerotiorume0pathogen
Compound: H2C2O4e0
Outcome: observed decreases in photosynthesise0
Qualifier: only partially responsiblee0

Verbatim

e0
“the acidity of the H2C2O4 secreted by S. sclerotiorum was only partially responsible for the observed decreases in photosynthesis.”
✓ located verbatim in the source · abstract, characters 915–1045

t0
“tobacco leaves”
✓ located verbatim in the source · title, characters 118–132

Title

Mechanisms by which the infection of Sclerotinia sclerotiorum (Lib.) de Baryaffects the photosynthetic performance in tobacco leaves

Cheng Yang; Zishan Zhang; Huiyuan Gao; et al. BMC Plant Biology 2014. doi:10.1186/s12870-014-0240-4

Other claims from this paper (16)

Intervention effect Sclerotinia infection reduced O2 evolution and Fv/Fm under high light.
Intervention effect H2C2O4 at pH 4 significantly decreased photosynthetic performance.
Intervention effect H3PO4 at matched pH decreased performance less than H2C2O4.
Intervention effect HCl at matched pH decreased performance less than H2C2O4.
Intervention effect K2C2O4 reduced Fv/Fm by about 70% of the effect of H2C2O4.
Intervention effect K2C2O4 did not further reduce photosynthetic performance when D1 synthesis was fully inhibited.
Mechanism Oxalate represses D1 synthesis and thereby inhibits PSII.
Intervention effect K2C2O4 inhibited RuBP regeneration.
Intervention effect K2C2O4 inhibited carboxylation efficiency.
Intervention effect K2C2O4 did not further decrease performance with carbon assimilation inhibited.
Mechanism C2O4(2-) partially inhibits PSII through carbon assimilation repression.
Intervention effect C2O4(2-) inhibited PSII activity.
Intervention effect C2O4(2-) did not inhibit PSI activity.
Mechanism Oxalate damage to photosynthetic apparatus exceeds the effect of acidity.
Mechanism Oxalate inhibition of PSII, RuBP regeneration and carboxylation leads to excess ROS.
Mechanism ROS may accelerate PSII photoinhibition through D1 synthesis inhibition.

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)

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Stomatal closure was interpreted as the main cause of reduced photosynthesis.

Outcome: decrease in photosynthesise0
Qualifier: stomatal closuree0

Not reportedTaxon

Verbatim

e0
“The yeast-induced decrease in photosynthesis is mainly caused by stomatal closure”
✓ located verbatim in the source · abstract, characters 1729–1810

Title

Influences of Saccharomyces cerevisiae on gas exchange and water-use efficiency in Vicia faba L.

Jing Gao; Nan Wang; Gang Zhang; et al. Emirates Journal of Food and Agriculture 2020. doi:10.9755/ejfa.2019.v31.i12.2041

Other claims from this paper (13)

Intervention effect Yeast spraying decreased stomatal aperture.
Intervention effect Yeast reduced net photosynthetic rate on days four through seven.
Intervention effect Yeast reduced carboxylation efficiency on day one.
Intervention effect Yeast decreased maximum PSII photochemical efficiency on days one to three.
Intervention effect Yeast increased non-photochemical quenching on days one to three.
Observation The photochemical parameters later recovered to normal.
Intervention effect Yeast decreased qP on the first two days.
Intervention effect Yeast initially decreased electron transport rate.
Intervention effect Yeast later increased electron transport rate.
Intervention effect Both yeast concentrations increased WUE on days four to seven.
Intervention effect The lower yeast concentration yielded higher WUE than the higher concentration.
Association Pn correlated positively with Tr and gs on day seven.
Observation Transpiration was more yeast-sensitive than photosynthesis.

Mechanismauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The effect of necrotic symptoms on net photosynthesis in wheat is due to a decrease in gross photosynthesis combined with an increase in dark respiration.

Taxon: wheatTriticum aestivume0
Treatment: necrotic symptomse7
Outcome: net photosynthesise7
Qualifier: a decrease in the gross photosynthesise7

Verbatim

e7
“Our results suggest that the effect of the necrotic symptoms on the net photosynthesis expressed by betanet >1 is due to a combination of a decrease in the gross photosynthesis (betagross still >1) and to an increase in the dark respiration rate (betagross<betanet).”
✓ located verbatim in the source · abstract, characters 1432–1698

e0
“In this study, the effect of Septoria tritici blotch (STB) on net photosynthetic and dark respiration rates of wheat flag leaves was quantified.”
✓ located verbatim in the source · abstract, characters 227–371

Title

Quantification of the effects of Septoria tritici blotch on wheat leaf gas exchange with respect to lesion age, leaf number, and leaf nitrogen status

Corinne Robert; Marie-Odile Bancal; Christian Lannou; et al. Journal of Experimental Botany 2005. doi:10.1093/jxb/eri153

Other claims from this paper (5)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Tissue integrity changes correlated with declining photosynthesis.

Taxon: Astragalus adsurgensAstragalus adsurgenst0
Organ / stage: Tissuee0
Outcome: decrease in Pe0
Direction: decreasee0

Verbatim

e0
“Tissue integrity changes in the plants correlated with the decrease in P”
✓ located verbatim in the source · abstract, characters 1315–1387

t0
“Astragalus adsurgens”
✓ located verbatim in the source · title, characters 69–89

Title

Alterations in Physiological Parameters and Secondary Metabolites of Astragalus adsurgens Infected by the Pathogen Alternaria gansuensis

Xinyao Han; Xiaopeng Li; James F. White; et al. Agronomy 2024. doi:10.3390/agronomy14091892

Other claims from this paper (12)

Intervention effect Inoculation decreased photosynthesis in week one, especially in the susceptible variety.
Observation Stomatal conductance did not change in the first week.
Observation Photosynthesis and stomatal conductance progressively decreased from week two.
Observation Significant stem lesions appeared from the second week.
Observation Water use efficiency rose slightly in week two.
Observation Water use efficiency fell significantly from week three.
Observation Physiological changes were less dramatic in resistant than susceptible standing milkvetch.
Observation Hyphae were observed around inoculation lesions.
Intervention effect Alternaria culture filtrate changed extracellular pH, especially in susceptible samples.
Intervention effect Alternaria culture filtrate changed extracellular conductivity, especially in susceptible samples.
Observation Twenty-one types of secondary metabolites were identified in the plants.
Intervention effect Pathogen infection markedly altered secondary metabolite composition and proportion.

“decrease of the photosynthesis”

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