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“yield decrease”

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2000 ’10 ’20

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Organism: Arabidopsis thaliana ✕

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

PSII quantum yield fell 14% after 8 h of chilling light.

Taxon: Arabidopsis thalianaArabidopsis thalianat0
Treatment: 8 h exposuree0
Outcome: quantum yielde0
Direction: decreasee0
Value: 14%e0

Not reportedComparator

Verbatim

e0
“PSII showed progressive damage with a 14% decrease in quantum yield after 8 h exposure”
✓ located verbatim in the source · abstract, characters 154–240

t0
“Arabidopsis thaliana”
✓ located verbatim in the source · title, characters 84–104

Title

Photoinhibition of Photosystem I at Chilling Temperature and Subsequent Recovery in Arabidopsis thaliana

Suping Zhang; Henrik Vibe Scheller Plant and Cell Physiology 2004. doi:10.1093/pcp/pch180

Other claims from this paper (10)

Intervention effect PSI NADP+ photoreduction activity fell about 32% and damage leveled off after 8 h.
Intervention effect Photoinhibitory treatment reduced antenna efficiency.
Observation Damaged PSI was not degraded during 8 h of light chilling.
Observation After 12 h recovery at 20 degrees C no damaged PSI remained in thylakoids.
Mechanism Damaged PSI degradation is part of recovery rather than immediate photodamage.
Observation The PSI core complex was completely degraded rather than repaired.
Observation Light harvesting complex I proteins turned over slowly.
Observation PSII completely recovered within 8 h at 20 degrees C.
Observation PSI activity recovered very slowly.
Observation PSI amount per leaf area remained low after 1 week at 20 degrees C.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Short high light exposure decreased PS II fluorescence and yield measures.

Taxon: Arabidopsis thalianaArabidopsis thalianat0
Outcome: Chl fluorescence in OJIPs, PS II quantum yield, and Fv/Fm ratioe0
Direction: decreasee0

Not reportedTreatmentComparator

Verbatim

t0
“Arabidopsis thaliana”
✓ located verbatim in the source · title, characters 88–108

e0
“In short-term experiment, photoinhibition of PS II was apparent as a decrease in Chl fluorescence in OJIPs, PS II quantum yield, and Fv/Fm ratio”
✓ located verbatim in the source · abstract, characters 565–709

Title

Does amount of light harvesting complexes play a role in thesensitivity of DCMU-treated Arabidopsis thaliana to high lightstress?

Jana Štepigová; Kristýna Večeřová; Miloš Barták 2009

Other claims from this paper (4)

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 resultmeasured

Claim · model-written summary

Cytosolic invertase reduced branching in Arabidopsis thaliana.

Taxon: Arabidopsis thalianaArabidopsis thalianae0
Treatment: cytosolic enzyme, the invertasee3
Outcome: branchinge3
Direction: decreaseinferrede3

Not reportedComparator

Verbatim

e0
“in the model plant Arabidopsis thaliana by expressing a cell wall invertase under a meristem-specific promoter”
✓ located verbatim in the source · abstract, characters 316–426

e3
“On the contrary, as cytosolic enzyme, the invertase causes delayed flowering, reduced seed yield, and branching”
✓ located verbatim in the source · abstract, characters 668–779

Title

Cell wall invertase expression at the apical meristem alters floral, architectural, and reproductive traits in Arabidopsis thaliana

Arnd G. Heyer; Maik Raap; Birgit Schroeer; et al. The Plant Journal 2004. doi:10.1111/j.1365-313x.2004.02124.x

Other claims from this paper (7)

Intervention effect Increased cell wall invertase activity accelerated flowering in Arabidopsis thaliana.
Intervention effect Increased cell wall invertase activity increased seed yield by nearly 30%.
Intervention effect Increased cell wall invertase activity increased the number of siliques.
Intervention effect Increased cell wall invertase activity enhanced branching of the inflorescence.
Intervention effect Cytosolic invertase delayed flowering in Arabidopsis thaliana.
Intervention effect Cytosolic invertase reduced seed yield in Arabidopsis thaliana.
Mechanism Invertases play a role in regulating developmental processes in Arabidopsis thaliana, in addition to determining sink strength.

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