Search claims · PlantClaims

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

The irt1 mutants had lower effective quantum yield of photosystem II.

Taxon: Arabidopsis thalianaArabidopsis thalianae0
Material: irt1-1 and irt1-2e0
Outcome: effective quantum yield of photosystem IIe0
Direction: decreasee0

Verbatim

e0
“The mutants irt1-1 and irt1-2 of Arabidopsis thaliana were identified among a collection of T-DNA-tagged lines on the basis of a decrease in the effective quantum yield of photosystem II”
✓ located verbatim in the source · abstract, characters 0–186

Title

The metal ion transporter IRT1 is necessary for iron homeostasis and efficient photosynthesis in Arabidopsis thaliana

Claudio Varotto; Daniela Maiwald; Paolo Pesaresi; et al. The Plant Journal 2002. doi:10.1046/j.1365-313x.2002.01381.x

Other claims from this paper (8)

Mechanism The irt1 mutations interfere with IRT1 expression.
Observation irt1 mutants had significantly altered photosensitivity, fluorescence and photosynthetic apparatus.
Observation irt1 mutants had altered photosynthetic-apparatus abundance and composition.
Observation irt1 mutants showed chlorosis and reduced growth and fertility in greenhouse conditions.
Intervention effect Additional iron salts restored almost all wild-type traits in irt1 plants.
Observation The irt2-1 mutant showed no iron-deficiency symptoms.
Intervention effect 35S::IRT1 complemented irt1-1 whereas 35S::IRT2 did not.
Mechanism The authors conclude only AtIRT1 is required for iron homeostasis under physiological conditions.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Lack of PsbS or violaxanthin de-epoxidase decreased the qE quantum yield.

Taxon: Arabidopsis thalianaArabidopsis thalianae0
Treatment: lack of either PsbS- or violaxanthin de-epoxidasee1
Outcome: quantum yield of qEe1
Direction: decreasee1
Comparator: wild typese0

Verbatim

e0
“measured in Arabidopsis thaliana wild types and mutants with partial defects in qE or CET”
✓ located verbatim in the source · abstract, characters 522–611

e1
“The decrease in quantum yield of qE due to the lack of either PsbS- or violaxanthin de-epoxidase was compensated by an increase in the quantum yield of the constitutive nonphotochemical quenching”
✓ located verbatim in the source · abstract, characters 613–808

Title

Dynamics and interplay of photosynthetic regulatory processes depend on the amplitudes of oscillating light

Yuxi Niu; Shizue Matsubara; Ladislav Nedbal; et al. Plant Cell & Environment 2024. doi:10.1111/pce.14879

Other claims from this paper (6)

Intervention effect The constitutive nonphotochemical quenching quantum yield increased in PsbS or violaxanthin de-epoxidase deficient plants.
Intervention effect The NDH-like-dependent CET mutant had a transient increase in PSI acceptor side limitation under high-amplitude oscillating light.
Intervention effect The PGR5/PGRL1-CET mutant restricted electron flows.
Intervention effect The PGR5/PGRL1-CET mutant failed to induce effective photosynthesis control regardless of oscillation amplitude.
Mechanism PGR5/PGRL1-CET appears important for regulating PSI function across oscillation amplitudes.
Mechanism NDH-like-CET acts as a safety valve under fluctuating light of high amplitude.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Cold treatment strongly decreased PSII electron-transport quantum yield in Arabidopsis accessions.

Taxon: Arabidopsis thalianaArabidopsis thalianat0
Treatment: cold treatmente0
Outcome: Φ PSIIe0
Direction: strong decreasee0
Comparator: standarde0

Verbatim

t0
“Arabidopsis thaliana”
✓ located verbatim in the source · title, characters 50–70

e0
“Observations were made over the course of several weeks in standard and low temperature conditions and a strong decrease in Φ PSII upon the cold treatment was found.”
✓ located verbatim in the source · abstract, characters 619–784

e1
“the steady state quantum yield of photosystem II (PSII) electron transport (Φ PSII )”
✓ located verbatim in the source · abstract, characters 399–483

Title

Natural variation of photosynthetic efficiency in Arabidopsis thaliana accessions under low temperature conditions

Aina E. Prinzenberg; Lucia Campos‐Dominguez; Willem Kruijer; et al. Plant Cell & Environment 2020. doi:10.1111/pce.13811

Other claims from this paper (2)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

The flo2 mutant leaves had fewer chloroplasts.

Taxon: Arabidopsis thalianaArabidopsis thalianat0
Material: mutante3
Organ / stage: leavese3
Outcome: chloroplast numberse3
Direction: decreasee3

Verbatim

t0
“Arabidopsis thaliana FLO2”
✓ located verbatim in the source · title, characters 0–25

e3
“The mutant leaves showed decrease of chloroplast numbers, and increased total biomass with faster growth”
✓ located verbatim in the source · abstract, characters 563–667

Title

Arabidopsis thaliana FLO2 is involved in efficiency of photoassimilate translocation, which associates with leaf growth and aging, yield of seeds, and seed quality

紀平, 望帆（東京理科大学）; 谷口, 一至（東京理科大学）; 金子, 千紘（東京理科大学）; et al. Institutional Repositories DataBase (IRDB) 2017

Other claims from this paper (11)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Camphor fumigation decreased relative growth rate in Arabidopsis thaliana.

Taxon: Arabidopsis thalianaArabidopsis thalianat0
Treatment: camphor fumigationse2
Outcome: relative growth ratee3
Direction: decreaseinferrede3

Not reportedComparator

Verbatim

t0
“Cyclic monoterpene mediated modulations ofArabidopsis thalianaphenotype”
✓ located verbatim in the source · title, characters 0–71

e2
“Non-invasive methods showed a fast response of the plant to camphor fumigations both in a rapid decrease of the quantum yield and in the relative growth rate”
✓ located verbatim in the source · abstract, characters 1163–1320

e3
“and in the relative growth rate”
✓ located verbatim in the source · abstract, characters 1289–1320

Title

Cyclic monoterpene mediated modulations ofArabidopsis thalianaphenotype

Bettina Kriegs; Marcus Jansen; Ka Hahn; et al. Plant Signaling & Behavior 2010. doi:10.4161/psb.5.7.12032

Other claims from this paper (11)

Intervention effect Camphor and menthol prevented stomatal closure in Arabidopsis thaliana.
Intervention effect Camphor induced MPK3 and ABF4 gene expression within six hours in Arabidopsis thaliana.
Intervention effect ABF2 was not induced, in contrast to ABF4, in Arabidopsis thaliana under monoterpene exposure.
Intervention effect PEPCase expression was down regulated in Arabidopsis thaliana under monoterpene exposure.
Observation Leaves of Arabidopsis thaliana developed stress symptoms after monoterpene exposure.
Intervention effect LOX2 expression changed transiently in Arabidopsis thaliana under monoterpene exposure.
Intervention effect CER5 expression changed transiently in Arabidopsis thaliana under monoterpene exposure.
Intervention effect CER6 expression changed transiently in Arabidopsis thaliana under monoterpene exposure.
Intervention effect RD29B expression changed transiently in Arabidopsis thaliana under monoterpene exposure.
Intervention effect Camphor fumigation rapidly decreased quantum yield in Arabidopsis thaliana.
Intervention effect Repeated monoterpene exposures reduced growth of Arabidopsis thaliana and changed its phenotype under stress.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Reduced PsbO coincided with decreased functional PSII content.

Taxon: Arabidopsis thalianaArabidopsis thalianae1
Gene: PSIIe0
Outcome: functional PSII contente0
Direction: decreasee0

Verbatim

e0
“These changes coincided with a decrease in functional PSII content.”
✓ located verbatim in the source · abstract, characters 631–698

t0
“Antisense reductions in the PsbO protein of photosystem II leads to decreased quantum yield but similar maximal photosynthetic rates”
✓ located verbatim in the source · title, characters 0–132

e1
“This research investigated the in vivo photosynthetic consequences of impairments to PSII in Arabidopsis thaliana (ecotype Columbia) expressing an antisense construct to the PsbO proteins of PSII.”
✓ located verbatim in the source · abstract, characters 270–466

Title

Antisense reductions in the PsbO protein of photosystem II leads to decreased quantum yield but similar maximal photosynthetic rates

Simon A Dwyer; Wah Soon Chow; Wataru Yamori; et al. Journal of Experimental Botany 2012. doi:10.1093/jxb/ers156

Other claims from this paper (9)

Observation Transgenic lines had 25 to 60% of wild type total PsbO content.
Observation PsbO1 was more strongly reduced than PsbO2.
Association Low PsbO plants grew more slowly.
Association Low PsbO plants had lower chlorophyll per leaf area.
Observation Cytochrome b6f, ATP synthase and Rubisco content per area did not change.
Association PSI declined in proportion to chlorophyll content reduction.
Association Low PsbO plants had lower photosynthetic quantum yield.
Association Low PsbO plants matched wild type oxygen evolution at saturating irradiance.
Mechanism The authors suggest a smaller pool of poorly antenna connected PSII centers lowered photochemical efficiency.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Chloroplast numbers decreased in flo2 mutant leaves.

Taxon: Arabidopsis thalianaArabidopsis thalianat0
Treatment: flo2 mutante1
Outcome: chloroplast numberse2
Direction: decreasee2

Not reportedComparator

Verbatim

t0
“Arabidopsis thaliana”
✓ located verbatim in the source · title, characters 0–20

e1
“Although the flo2 mutant of A. thaliana showed normal germination, inflorescence and morphogenesis of flowers, peculiar phenotypes on leaves and siliques were observed”
✓ located verbatim in the source · abstract, characters 300–467

e2
“The mutant leaves showed a decrease in chloroplast numbers, and increased total biomass with faster growth”
✓ located verbatim in the source · abstract, characters 570–676

Title

Arabidopsis thaliana FLO2 is Involved in Efficiency of Photoassimilate Translocation, Which is Associated with Leaf Growth and Aging, Yield of Seeds and Seed Quality

Miho Kihira; Kazushi Taniguchi; Chihiro Kaneko; et al. Plant and Cell Physiology 2016. doi:10.1093/pcp/pcw217

Other claims from this paper (13)

Observation The flo2 mutant showed normal germination, inflorescence and morphogenesis of flowers.
Observation The flo2 mutant showed peculiar phenotypes on leaves and siliques.
Intervention effect Total biomass increased in the flo2 mutant with faster growth.
Intervention effect High light intensity conditions induced aging events.
Intervention effect The flo2 mutant showed depressed transport of photoassimilates into the sink organs.
Intervention effect Siliques of the flo2 mutant were significantly smaller.
Intervention effect The flo2 mutant reduced seed yield.
Observation Seeds of the flo2 mutant were structurally weak.
Intervention effect Seed quality was significantly lowered in the flo2 mutant.
Intervention effect Accumulation of storage compounds by seeds was reduced in the flo2 mutant.
Intervention effect PETIS analysis detected decreased photoassimilate transport in the flo2 mutant.
Mechanism The flo2 mutant phenotypes were presumed to be caused by reduced translocation or transport of photoassimilates.
Mechanism AtFLO2 is strongly involved in regulating translocation and transport of assimilates.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Growth rate of etiolated Arabidopsis hypocotyls decreased 3-fold between 3- and 4-day-old hypocotyls.

Taxon: Arabidopsis thalianaArabidopsis thalianae0
Outcome: growth ratee1
Direction: decreasee1
Value: 3-folde1
Qualifier: 4- vs 3-day-old hypocotylse1

Verbatim

e0
“we critically tested several metrics (creep rate, creep rate×stress-1, in vitro cell wall extensibility (ϕ) and in vitro cell wall yield threshold (y)) for their ability to predict growth rates of etiolated Arabidopsis thaliana (L. Heynh.) hypocotyls”
✓ located verbatim in the source · abstract, characters 275–525

e1
“The best indicator of growth rate was ϕ because the 3-fold developmental decrease in the growth rate of 4- vs 3-day-old hypocotyls was accompanied by a 3-fold decrease in ϕ determined at pH 5”
✓ located verbatim in the source · abstract, characters 693–884

Title

In vitro cell wall extensibility controls age-related changes in the growth rate of etiolated Arabidopsis hypocotyls

Dmitry Suslov; Alexander Ivakov; Agnieszka K. Boron; et al. Functional Plant Biology 2015. doi:10.1071/fp15190

Other claims from this paper (5)

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

The constitutive nonphotochemical quenching quantum yield increased in PsbS or violaxanthin de-epoxidase deficient plants.

Taxon: Arabidopsis thalianaArabidopsis thalianae0
Treatment: lack of either PsbS- or violaxanthin de-epoxidasee1
Outcome: quantum yield of the constitutive nonphotochemical quenchinge1
Direction: increasee1
Comparator: wild typese0

Verbatim

e0
“measured in Arabidopsis thaliana wild types and mutants with partial defects in qE or CET”
✓ located verbatim in the source · abstract, characters 522–611

e1
“The decrease in quantum yield of qE due to the lack of either PsbS- or violaxanthin de-epoxidase was compensated by an increase in the quantum yield of the constitutive nonphotochemical quenching”
✓ located verbatim in the source · abstract, characters 613–808

Title

Dynamics and interplay of photosynthetic regulatory processes depend on the amplitudes of oscillating light

Yuxi Niu; Shizue Matsubara; Ladislav Nedbal; et al. Plant Cell & Environment 2024. doi:10.1111/pce.14879

Other claims from this paper (6)

Intervention effect Lack of PsbS or violaxanthin de-epoxidase decreased the qE quantum yield.
Intervention effect The NDH-like-dependent CET mutant had a transient increase in PSI acceptor side limitation under high-amplitude oscillating light.
Intervention effect The PGR5/PGRL1-CET mutant restricted electron flows.
Intervention effect The PGR5/PGRL1-CET mutant failed to induce effective photosynthesis control regardless of oscillation amplitude.
Mechanism PGR5/PGRL1-CET appears important for regulating PSI function across oscillation amplitudes.
Mechanism NDH-like-CET acts as a safety valve under fluctuating light of high amplitude.

Mechanismobservedoriginal resultnegativemeasured

Claim · model-written summary

FAMA knockdown inhibited expression of myrosinase genes in Arabidopsis thaliana.

Taxon: Arabidopsis thalianaArabidopsis thalianae0
Treatment: knockdown of FAMA genee0
Gene: FAMAe0
Outcome: expression of myrosinase genese0
Qualifier: inhibitinge0

Verbatim

e0
“the knockdown of FAMA gene in Arabidopsis thaliana could significantly decrease sulforaphane yield by inhibiting the expression of myrosinase genes”
✓ located verbatim in the source · abstract, characters 1329–1476

Title

BoMyrosinase plays an essential role in sulforaphane accumulation in response to selenite treatment in broccoli

Qiuyun Wu; Qi Wu; Yuxiao Tian; et al. Horticultural Plant Journal 2023. doi:10.1016/j.hpj.2023.04.005

Other claims from this paper (13)

Association Selenite-associated change in broccoli sprout sulforaphane content was positively related to BoMY expression.
Intervention effect BoMY overexpression increased myrosinase activity in Arabidopsis thaliana tgg1 mutant rosette leaves.
Intervention effect BoMY overexpression increased sulforaphane content in Arabidopsis thaliana tgg1 mutant rosette leaves.
Intervention effect BoMY overexpression rescued the Arabidopsis thaliana tgg1 mutant phenotypes.
Intervention effect BoMY-overexpressed broccoli lines had increased myrosinase activity.
Intervention effect BoMY-overexpressed broccoli lines had increased sulforaphane content.
Observation A 2 033 bp BoMY promoter fragment was isolated.
Mechanism BoFAMA directly bound the BoMY promoter.
Mechanism BoFAMA activated BoMY expression.
Observation BoFAMA responded to selenite and was highly expressed in broccoli leaves.
Observation BoFAMA protein localized solely to the nucleus.
Intervention effect FAMA knockdown significantly decreased sulforaphane yield in Arabidopsis thaliana.
Intervention effect Exogenous selenite partly restored low sulforaphane content in FAMA-silenced Arabidopsis plants.

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