Search claims · PlantClaims

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

UV-B decreased stomatal density in lettuce.

Taxon: LettuceLactuca sativae1
Treatment: UV-B radiatione1
Outcome: stomatal densitye1
Direction: decreasee1

Not reportedComparator

Verbatim

e1
“Lettuce plants subjected to UV-B radiation showed an increase in callose and oxidative stress indicators, as well as a decrease in stomatal density”
✓ located verbatim in the source · abstract, characters 524–671

Title

Leaf UV-B Irradiation and Mycorrhizal Symbionts Affect Lettuce VOC Emissions and Defence Mechanisms, but Not Aphid Feeding Preferences

Valeria Zeni; Arianna Grassi; Marco Santin; et al. Insects 2022. doi:10.3390/insects14010020

Other claims from this paper (10)

Intervention effect UV-B increased callose and oxidative stress indicators in lettuce.
Intervention effect Mycorrhizal colonization cancelled out the UV-B effect on lettuce stomatal density.
Intervention effect The symbiosis was not affected by UV-B treatment.
Intervention effect Mycorrhization had no significant effect on the lettuce volatilome, regardless of UV-B treatment.
Intervention effect UV-B significantly altered lettuce plant volatile emission.
Intervention effect The 1-undecene abundance increased under UV-B with mycorrhization (+M/+UVB: 48.0 ± 7.78%).
Intervention effect The decanal content decreased under UV-B with mycorrhization (+M/+UVB: 8.50 ± 3.90%).
Intervention effect The undecanal content decreased under UV-B with mycorrhization (+M/+UVB: 2.1 ± 0.65%).
Intervention effect The sesquiterpene hydrocarbons decreased under UV-B with mycorrhization (+M/+UVB: 18.0 ± 9.62 %).
Intervention effect Aphid (Myzus persicae) population was unaffected by any of the AMF and UV-B treatments.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Super absorbent hydrogels significantly decreased soil saturated hydraulic conductivity and bulk density.

Taxon: lettuceLactuca sativae0
Treatment: super absorbent hydrogelse4
Outcome: soil saturated hydraulic conductivity and bulk densitye4
Direction: decreasee4

Not reportedComparator

Verbatim

e0
“soil hydro-physical properties and lettuce productivity”
✓ located verbatim in the source · abstract, characters 300–355

e4
“The significant decrease in soil saturated hydraulic conductivity and bulk density confirms that super absorbent hydrogels could be recommended”
✓ located verbatim in the source · abstract, characters 1219–1362

Title

Effect of super absorbent hydrogel on hydro-physical properties of soil under deficit irrigation

Rasha Abdelghafar; Ahmed Abdelfattah; Harby Mostafa Scientific Reports 2024. doi:10.1038/s41598-024-57786-5

Other claims from this paper (6)

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Higher photon flux density decreased chlorophyll:carotenoid ratio in both cultivars.

Taxon: lettuceLactuca sativat0
Treatment: higher PFDe0
Outcome: chlorophyll:carotenoid ratioe0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“decrease in chlorophyll:carotenoid ratio in response to higher PFD were found in both cultivars.”
✓ located verbatim in the source · abstract, characters 1685–1781

t0
“lettuce”
✓ located verbatim in the source · title, characters 71–78

Title

Using leaf spectroscopy and pigment estimation to monitor indoor grown lettuce dynamic response to spectral light intensity

Laura Cammarisano; Jan Graefe; Oliver Körner Frontiers in Plant Science 2022. doi:10.3389/fpls.2022.1044976

Other claims from this paper (3)

Intervention effect WB40 increased measured and estimated pigments in both cultivars.
Association Pigment stimulation over time differed by cultivar.
Method / resource Modelled and measured pigment content ranges were comparable.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Incubated chitin soil reduced Fol density and lettuce disease severity.

Taxon: lettuceLactuca sativae1
Treatment: chitine0
Interactor: Fole0pathogen
Outcome: Fol population density and disease severitye0
Direction: decreasee0
Comparator: unamended and non-incubated soilse0

Verbatim

e0
“Soils that were incubated with chitin or BSFL frass showed a significant decrease in Fol population density and disease severity compared to the unamended and non-incubated soils (P < 0.05).”
✓ located verbatim in the source · abstract, characters 971–1161

e1
“disease severity caused by Fol on lettuce”
✓ located verbatim in the source · abstract, characters 871–912

Title

Perspectives on microbial community changes produced by Hermitia illucens frass and their impact on soil suppression against Fusarium oxysporum f. sp. lactucae

Paloma Hernández‐Muñiz; Celia Borrero; Manuel Avilés; et al. Pest Management Science 2025. doi:10.1002/ps.70036

Other claims from this paper (2)

Intervention effect Incubated BSFL frass soil reduced Fol density and lettuce disease severity.
Observation Incubated chitin and frass soils were enriched for biocontrol-associated microbial OTUs.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Incubated BSFL frass soil reduced Fol density and lettuce disease severity.

Taxon: lettuceLactuca sativae1
Treatment: BSFL frasse0
Interactor: Fole0pathogen
Outcome: Fol population density and disease severitye0
Direction: decreasee0
Comparator: unamended and non-incubated soilse0

Verbatim

e0
“Soils that were incubated with chitin or BSFL frass showed a significant decrease in Fol population density and disease severity compared to the unamended and non-incubated soils (P < 0.05).”
✓ located verbatim in the source · abstract, characters 971–1161

e1
“disease severity caused by Fol on lettuce”
✓ located verbatim in the source · abstract, characters 871–912

Title

Perspectives on microbial community changes produced by Hermitia illucens frass and their impact on soil suppression against Fusarium oxysporum f. sp. lactucae

Paloma Hernández‐Muñiz; Celia Borrero; Manuel Avilés; et al. Pest Management Science 2025. doi:10.1002/ps.70036

Other claims from this paper (2)

Intervention effect Incubated chitin soil reduced Fol density and lettuce disease severity.
Observation Incubated chitin and frass soils were enriched for biocontrol-associated microbial OTUs.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

At 0.1 to 1.0μL L-1 ethylene, lettuce photosynthesis and transpiration rates did not decrease across tested photon flux densities.

Taxon: lettuceLactuca sativae1
Treatment: 0.1 to 1.0μL L-1 of ethylenee1
Outcome: rates of lettuce plante1
Direction: no decreasese1
Qualifier: under any photosynthetic photon flux density (130, 270, and 380μmol m-2 s-1)e1

Not reportedComparator

Verbatim

t0
“Lettuce”
✓ located verbatim in the source · title, characters 97–104

e1
“no decreases in the rates of lettuce plant were observed at 0.1 to 1.0μL L-1 of ethylene under any photosynthetic photon flux density (130, 270, and 380μmol m-2 s-1)”
✓ located verbatim in the source · abstract, characters 417–582

Title

Studies on Trace Contaminant Accumulated in Closed Systems. Effects of Ethylene on the Growth of Lettuce.

Akira TANI; Takao SAITO; Makoto KIYOTA; et al. Seibutsu kankyō chōsetsu/Seibutsu kankyou chousetsu 1996. doi:10.2525/ecb1963.34.37

Other claims from this paper (7)

Association Lettuce absorbed ethylene, with absorption increasing as ethylene concentration rose.
Observation Lettuce did not absorb ethylene under dark conditions.
Intervention effect Lettuce cultivated at 0.5μL L-1 ethylene for 10 days developed epinasty and chlorosis.
Intervention effect At 0.5μL L-1 ethylene for 10 days, lettuce leaf expansion was inhibited.
Intervention effect At 0.1μL L-1 ethylene, lettuce leaf expansion was significantly inhibited.
Intervention effect Growth rate was slightly lower in ethylene exposed lettuce than in ethylene free air.
Recommendation The authors estimated the allowable ethylene level for lettuce at about 0.1μL L-1.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Increasing plant density decreased seed yield per plant in lettuce.

Taxon: LETTUCELactuca sativat0
Treatment: plant densitye2
Outcome: seed yield/plante3
Direction: decreaseinferrede3

Not reportedComparator

Verbatim

t0
“LETTUCE FLOWERING AND SEED PRODUCTION UNDER THE INFLUENCE OF PLANT DENSITY AND FOLIAR SPRAYING WITH GIBBERLLIC ACID”
✓ located verbatim in the source · title, characters 0–115

e2
“The results indicated that the flowering stem height, percentage of mature inflorescence, no. of flower head inflorescence, percentage of heavy seed and seed yield/m2 reflected significant and successive increments as a result of increasing the plant density”
✓ located verbatim in the source · abstract, characters 198–456

e3
“However, the no. of inflorescences / plant, flower heads quality, percentage of light seed and seed yield/plant, reflected reversal trends”
✓ located verbatim in the source · abstract, characters 458–596

Title

LETTUCE FLOWERING AND SEED PRODUCTION UNDER THE INFLUENCE OF PLANT DENSITY AND FOLIAR SPRAYING WITH GIBBERLLIC ACID

M. Feleafel, Journal of Plant Production 2000. doi:10.21608/jpp.2000.259145

Other claims from this paper (8)

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Both Pseudomonas strains levelled out the decrease in lettuce plant weight under dense planting.

Taxon: lettuceLactuca sativat0
Treatment: ABA degrading bacteriae3
Interactor: P. plecoglossicida 2.4-DPseudomonas plecoglossicidae1symbiont
Second interactor: P. veronii IB K11-1Pseudomonas veroniie1symbiont
Outcome: plant weighte1
Direction: level out the decreasee1
Setting: laboratory experimentse0

Not reportedComparator

Verbatim

t0
“GROWTH IN LETTUCE PLANTS”
✓ located verbatim in the source · title, characters 131–155

e1
“similar abilities of bacteria, P. plecoglossicida 2.4-D and P. veronii IB K11-1 to level out the decrease in plant weight in dense planting were found”
✓ located verbatim in the source · abstract, characters 412–562

e3
“inoculating lettuce plants with ABA degrading bacteria belonging to Pseudomonas”
✓ located verbatim in the source · abstract, characters 220–299

e0
“In laboratory experiments simulating planting density”
✓ located verbatim in the source · abstract, characters 301–354

Title

ABA-METABOLIZING BACTERIA INFLUENCE THE CONTENT OF ABA, IAA AND CYTOKININS AND REDUCE THE NEGATIVE EFFECT OF THICKENED PLANTING ON GROWTH IN LETTUCE PLANTS

E.V. Martynenko; А.S. Ryabova; G.R. Kudoyarova; et al. ÈKOBIOTEH 2024. doi:10.31163/2618-964x-2024-7-3-193-203

Other claims from this paper (5)

Intervention effect Both Pseudomonas strains reduced the ABA hormone content in the shoots of competing lettuce plants.
Intervention effect Both Pseudomonas strains increased the IAA content in the roots of lettuce plants.
Association IAA content dropped sharply in lettuce plants under dense planting.
Intervention effect Both Pseudomonas strains reduced the zeatin content in the roots of lettuce plants.
Mechanism The growth benefit of ABA-degrading bacteria is discussed as higher hydraulic conductivity and better gas exchange after lower shoot ABA.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

At the highest initial population density, M. hapla caused lettuce yield losses of up to 64% in microplots.

Taxon: LettuceLactuca sativae1
Treatment: highest Pie4
Interactor: M. haplaMeloidogyne haplae4pathogen
Outcome: yield lossese4
Direction: decreaseinferrede4
Value: up to 64%e4

Not reportedComparator

Verbatim

e1
“Lettuce was seeded in pots in the greenhouse and in field microplots in 1991 and 1992.”
✓ located verbatim in the source · abstract, characters 0–86

e4
“At the highest Pi, M. hapla caused yield losses up to 64% in the microplots and plant death in the greenhouse tests.”
✓ located verbatim in the source · abstract, characters 375–491

Title

Damage Threshold of Meloidogyne hapla to Lettuce in Organic Soil.

N M Viaene; G S Abawi PubMed 1996

Other claims from this paper (9)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Increasing plant density decreased the number of inflorescences per plant, flower head quality and light seed percentage in lettuce.

Taxon: LETTUCELactuca sativat0
Treatment: plant densitye2
Outcome: no. of inflorescences / plant, flower heads quality, percentage of light seede3
Direction: decreaseinferrede3

Not reportedComparator

Verbatim

t0
“LETTUCE FLOWERING AND SEED PRODUCTION UNDER THE INFLUENCE OF PLANT DENSITY AND FOLIAR SPRAYING WITH GIBBERLLIC ACID”
✓ located verbatim in the source · title, characters 0–115

e2
“The results indicated that the flowering stem height, percentage of mature inflorescence, no. of flower head inflorescence, percentage of heavy seed and seed yield/m2 reflected significant and successive increments as a result of increasing the plant density”
✓ located verbatim in the source · abstract, characters 198–456

e3
“However, the no. of inflorescences / plant, flower heads quality, percentage of light seed and seed yield/plant, reflected reversal trends”
✓ located verbatim in the source · abstract, characters 458–596

Title

LETTUCE FLOWERING AND SEED PRODUCTION UNDER THE INFLUENCE OF PLANT DENSITY AND FOLIAR SPRAYING WITH GIBBERLLIC ACID

M. Feleafel, Journal of Plant Production 2000. doi:10.21608/jpp.2000.259145

Other claims from this paper (8)

Intervention effect Increasing plant density increased flowering stem height, mature inflorescence percentage and flower heads per inflorescence in lettuce.
Intervention effect Increasing plant density increased heavy seed percentage and seed yield per square meter in lettuce.
Intervention effect Increasing plant density decreased seed yield per plant in lettuce.
Intervention effect Plant density had no effect on seed weight per flower head, seed index and germination percentage in lettuce.
Intervention effect Spraying lettuce with GA3 up to 10 p.p.m. increased mature inflorescence percentage, inflorescence number and flower heads per inflorescence.
Intervention effect Spraying lettuce with GA3 up to 10 p.p.m. increased flower head quality, heavy seed percentage and total seed yield per plant and per square meter.
Intervention effect GA3 concentration did not affect seed index or germination percentage in lettuce.
Recommendation Sowing at the highest density with 10 p.p.m. GA3 spraying is the best combination for high lettuce seed yield and quality.

“decrease in density”

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