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 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 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.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

WR139 reduced lettuce height by 40.0% relative to natural light.

Taxon: LettuceLactuca sativae0
Treatment: WR139e0
Outcome: plant heighte0
Direction: decreasee0
Value: 40.0%e0
Comparator: NLe0

Verbatim

e0
“Lettuce grown under WR139 resulted in a 40.0% decrease in plant height, 66.8% increase in leaf thickness, and 34.1% increase in shoot fresh weight compared with those of lettuce grown under NL.”
✓ located verbatim in the source · abstract, characters 1047–1240

Title

Partially Substituting Photosynthetic Photon Flux Density with Far-red Photons Differentially Alters Biomass Accumulation and Photochemical Efficiency of Greenhouse Lettuce

Zhengnan Yan; Xin Li; Zhixin Li; et al. HortScience 2024. doi:10.21273/hortsci18126-24

Other claims from this paper (12)

Intervention effect Supplementary light lowered lettuce height relative to natural light.
Intervention effect Supplementary light made lettuce leaves thicker than natural light.
Intervention effect Supplementary light increased lettuce biomass accumulation relative to natural light.
Intervention effect Supplementary light increased lettuce vitamin C, starch, and total soluble sugar content relative to natural light.
Intervention effect WR139 increased lettuce leaf thickness by 66.8% relative to natural light.
Intervention effect WR139 increased lettuce shoot fresh weight by 34.1% relative to natural light.
Observation The three lowest far-red treatments did not differ significantly in listed morphology and biomass measures.
Observation The three lowest far-red treatments did not differ significantly in listed physiological measures.
Association Greater far-red substitution was associated with declining lettuce biomass accumulation.
Association Greater far-red substitution was associated with declining lettuce maximum net photosynthetic rate.
Association Lettuce maximum photochemical quantum yield showed the opposite, increasing trend.
Recommendation The authors advise considering photon flux density when applying far-red photons because excess substitution had negative effects.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

UV-B increased callose and oxidative stress indicators in lettuce.

Taxon: LettuceLactuca sativae1
Treatment: UV-B radiatione1
Outcome: callose and oxidative stress indicatorse1
Direction: increasee1

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 decreased stomatal density 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.

“decrease in density”

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