Search claims · PlantClaims

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Nitration was proposed to inhibit catalase and increase H2O2 during ripening.

Taxon: peppere1
Outcome: increase in H2O2 contente0
Direction: increasee0
Qualifier: Nitration seems to play a key role in this down-regulatione0

Verbatim

e0
“Nitration seems to play a key role in this down-regulation, favoring an increase in H2O2 content during ripening”
✓ located verbatim in the source · abstract, characters 1327–1439

e1
“pepper (Capsicum annuum L.) fruit ripening”
✓ located verbatim in the source · abstract, characters 207–249

Title

Pepper catalase: a broad analysis of its modulation during fruit ripening and by nitric oxide

Salvador González-Gordo; Javier López-Jaramillo; Marta Rodríguez-Ruiz; et al. Biochemical Journal 2024. doi:10.1042/bcj20240247

Other claims from this paper (10)

Observation Three pepper catalase genes were identified.
Observation Catalase gene expression was differentially modulated during ripening and NO treatment.
Observation CaCat1 through CaCat3 protein expression showed dissimilar behavior.
Observation Catalase activity was 50% lower in ripe red fruit than immature green fruit.
Observation Gel electrophoresis identified one catalase isozyme.
Intervention effect Peroxynitrite exposure nitrated recombinant CaCat3.
Intervention effect Peroxynitrite nitrated Tyr348 near catalase active center.
Intervention effect Peroxynitrite nitrated Tyr360 near catalase active center.
Intervention effect Exogenous NO could reverse the ripening pattern.
Observation Pepper catalase structure favored a homodimer.

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Higher H2O2 accumulation in wheat was linked by the authors to disrupted membranes and greater MDA content.

Taxon: wheatTriticum aestivumt0
Compound: H2O2e0
Outcome: disruption of cellular membrane integritye0
Qualifier: increase in MDA contente0

Verbatim

e0
“Accumulation of H2O2, which is a strong oxidant, led to disruption of cellular membrane integrity as obvious from increase in MDA content and an indicator of lipid peroxidation.”
✓ located verbatim in the source · abstract, characters 1563–1740

t0
“wheat cultivars”
✓ located verbatim in the source · title, characters 64–79

Title

Heat-induced oxidative stress and changes in protein profile in wheat cultivars

R. Mahla; S. Madan; R. Munjal; et al. Quality Assurance and Safety of Crops & Foods 2012. doi:10.1111/j.1757-837x.2012.00141.x

Other claims from this paper (13)

Intervention effect Heat stress increased leaf H2O2 production in both tolerant and susceptible wheat genotypes.
Observation Under heat stress, susceptible wheat genotypes had significantly more H2O2 than tolerant genotypes.
Intervention effect Heat stress enhanced CAT, POX, GR and APX activity in leaves of both wheat genotype classes.
Observation The percentage increase in antioxidative enzyme activity under heat stress was higher in tolerant wheat genotypes.
Intervention effect Heat stress increased SOD activity in tolerant wheat genotypes.
Intervention effect Heat stress decreased SOD activity in susceptible wheat genotypes.
Intervention effect After revival, CAT, POX and GR activities declined relative to stressed wheat seedlings but remained above controls.
Observation Susceptible wheat genotypes showed a greater increase in H2O2 and MDA content than tolerant genotypes.
Intervention effect After revival, H2O2 and MDA content fell in all wheat genotypes but stayed above controls.
Observation Heat stressed WH-1021 seedlings displayed five new polypeptide bands.
Observation Heat stressed HW-2045 seedlings displayed five polypeptide bands.
Observation The two susceptible wheat genotypes showed similar high temperature induced polypeptide bands.
Mechanism Authors suggest greater heat tolerance of HW-2045 and WH-1021 may reflect heat shock proteins and oxygen scavenging enzymes.

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

The authors relate H2O2 accumulation to higher SOD or POD and lower CAT activities.

Taxon: CucumberCucumis sativust0
Gene: SOD or PODe0
Outcome: increase of H2O2 contente0
Qualifier: decrease of CAT activitiese0

Verbatim

t0
“Cucumber Leaves”
✓ located verbatim in the source · title, characters 73–88

e0
“The increase of H2O2 content may be related to the increase of SOD or POD activities and the decrease of CAT activities”
✓ located verbatim in the source · abstract, characters 505–624

Title

Effects of BTH on the H_2O_2 Production and Related Enzyme Activities in Cucumber Leaves

Huanwen Meng Xibei nongye xuebao 2008

Other claims from this paper (5)

Intervention effect BTH significantly increased leaf H2O2 content.
Intervention effect Following inoculation, H2O2 accumulated faster in BTH treated leaves than in controls.
Intervention effect BTH enhanced SOD and POD activities in leaves.
Intervention effect BTH inhibited CAT activity in leaves.
Mechanism The authors propose H2O2 mediated defense gene expression as a main mechanism of BTH induced resistance.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The authors attribute increased endopeptidase activity and reduced protein content under aluminum stress to H2O2 production.

Taxon: WheatTriticum aestivumt0
Treatment: Al 3+ stresse0
Compound: H2O2e0
Outcome: increase of endopeptidase activity and the decrease of protein contente0
Qualifier: likelye0

Verbatim

e0
“These results showed that the increase of endopeptidase activity and the decrease of protein content are likely to the production of H2O2 under Al 3+ stress.”
✓ located verbatim in the source · abstract, characters 319–476

t0
“Wheat Seedling”
✓ located verbatim in the source · title, characters 63–77

Title

Endopeptidase Activity and Active Oxygen Production in Leaf of Wheat Seedling under Aluminiu Stress

Fen Zhang Agro-environmental Protection 2000

Other claims from this paper (6)

Intervention effect Aluminum stress increased leaf endopeptidase activity and decreased protein content in wheat seedlings.
Intervention effect Aluminum stress decreased leaf protein content in wheat seedlings.
Intervention effect H2O2 treatment increased wheat leaf endopeptidase activity.
Intervention effect H2O2 treatment decreased wheat leaf protein content.
Intervention effect ASA treatment decreased wheat leaf endopeptidase activity.
Intervention effect ASA treatment markedly increased wheat leaf protein content.

Mechanismhypothesisoriginal resultmeasured

Claim · model-written summary

ODAP accumulation under osmotic stress might be related to the increase in H2O2 content in grass pea.

Taxon: Lathyrus sativusLathyrus sativust0
Treatment: osmotic stresse5
Compound: H 2O 2e5
Outcome: accumulation of ODAPe5

Verbatim

t0
“Grass Pea ( Lathyrus sativus )”
✓ located verbatim in the source · title, characters 64–94

e5
“we suggest that the accumulation of ODAP might be related to the increase in H 2O 2 content under osmotic stress”
✓ located verbatim in the source · abstract, characters 718–830

Title

Effects of Osmotic Stress on Accumulation of H_2O_2 and ODAP in Grass Pea ( Lathyrus sativus )

Xing Geng Acta Photophysiologica Sinica 2001

Other claims from this paper (7)

Intervention effect During PEG treatment, peroxidase and catalase activities decreased in grass pea.
Intervention effect PEG treatment increased hydrogen peroxide content in grass pea.
Intervention effect PEG treatment increased ODAP content in grass pea.
Intervention effect Diethyldithiocarbamate decreased H2O2 content in grass pea under osmotic stress.
Intervention effect Aminotriazole increased H2O2 content in grass pea under osmotic stress.
Intervention effect Diethyldithiocarbamate markedly decreased ODAP accumulation in grass pea.
Intervention effect Aminotriazole significantly increased ODAP accumulation in grass pea.

Mechanismhypothesisoriginal resultnegativebasis n/a

Claim · model-written summary

Oxidative damage in Rhododendron jinggangshanicum under high temperature may be related to the increase in H2O2 and MDA and the reduction in AsA.

Taxon: Rhododendron jinggangshanicumt0
Compound: H2O2e6
Outcome: oxidative damagee6
Qualifier: may be related toe6

Verbatim

t0
“Rhododendron jinggangshanicum”
✓ located verbatim in the source · title, characters 45–74

e6
“the oxidative damage which R.jinggangshanicum suffered under the high temperature stress may be related to the obvious increase in the content of H2O2 and MDA,as well as largely reduced content of AsA”
✓ located verbatim in the source · abstract, characters 1463–1663

Title

Responses of Antioxidant System in Leaves of Rhododendron jinggangshanicum to High Temperature Stress

Shusheng Wang Xibei zhiwu xuebao 2010

Other claims from this paper (12)

Intervention effect At 30℃ the leaf POD activity of Rhododendron jinggangshanicum increased by 44.44%.
Intervention effect At 38℃ the leaf POD activity of Rhododendron jinggangshanicum increased by 127.16%.
Intervention effect At 30℃ the leaf APX activity of Rhododendron jinggangshanicum increased by 33.12%.
Intervention effect At 38℃ the leaf APX activity of Rhododendron jinggangshanicum increased by 129.35%.
Intervention effect At 30℃ the leaf CAT activity of Rhododendron jinggangshanicum increased by 106.52%.
Intervention effect At 38℃ the leaf CAT activity of Rhododendron jinggangshanicum increased by 188.64%.
Intervention effect At 30℃ the change in SOD of Rhododendron jinggangshanicum was not larger, at 3.77% increase.
Intervention effect At 38℃ the change in SOD of Rhododendron jinggangshanicum was not larger, at 5.11% increase.
Association Soluble protein and proline contents increased with rising temperature in Rhododendron jinggangshanicum.
Association Ascorbic acid content decreased with rising temperature in Rhododendron jinggangshanicum.
Association H2O2 and MDA contents accumulated greatly under high-temperature strengthening in Rhododendron jinggangshanicum.
Mechanism Increasing antioxidant enzyme activities and proline content may decrease oxidative damage under high temperature in Rhododendron jinggangshanicum.

Mechanismhypothesisoriginal resultbasis n/a

Claim · model-written summary

An increase in H2O2 levels may trigger the sequence of reactions involved in breaking endodormancy.

Taxon: Japanese peare0
Compound: H2O2e5
Outcome: breaking of endodormancye5

Verbatim

e0
“Hydrogen peroxide (H2O2) content was determined in flower buds of Japanese pear (Pyrus pyrifolia Nakai cv. Kosui) trees under natural conditions during the development and their release from endodormancy”
✓ located verbatim in the source · abstract, characters 0–203

e5
“These results suggest that H2O2 can substitute for the chilling requirement, and that the increase in H2O2 levels may trigger the sequence of reactions involved in the breaking of endodormancy”
✓ located verbatim in the source · abstract, characters 1354–1546

Title

Changes in Hydrogen Peroxide Content in Flower Buds of Japanese Pear(Pyrus pyrifolia Nakai) in Relation to Breaking of Endodormancy.

Haruyuki Kuroda; Toshihiko Sugiura; Daiyu Ito Journal of the Japanese Society for Horticultural Science 2002. doi:10.2503/jjshs.71.610

Other claims from this paper (13)

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Suppression of ascorbate peroxidase and catalase enzymatic activities is proposed to explain the increase in H2O2 content in maize.

Taxon: maizeZea mayse0
Gene: ascorbate peroxidase and catalase enzymatic activitiese5
Outcome: H 2 O 2 contente5

Verbatim

e0
“leaves of maize seedlings treated with an inhibitor of nitric oxide synthase-like activity”
✓ located verbatim in the source · abstract, characters 554–644

e5
“inhibition of nitric oxide synthase-like activity, which suppresses ascorbate peroxidase and catalase enzymatic activities, results in increased H 2 O 2 content”
✓ located verbatim in the source · abstract, characters 1314–1474

Title

Inhibition of NOS- like activity in maize alters the expression of genes involved in H2O2 scavenging and glycine betaine biosynthesis

Kyle Phillips; Anelisa Majola; Arun Gokul; et al. Scientific Reports 2018. doi:10.1038/s41598-018-31131-z

Other claims from this paper (5)

Intervention effect In maize seedlings treated with a nitric oxide synthase inhibitor, transcript levels of betaine aldehyde dehydrogenase were decreased.
Intervention effect In maize plants treated with the nitric oxide synthase inhibitor, transcript levels of ascorbate peroxidase-encoding genes were down-regulated.
Intervention effect Catalase activity was suppressed in maize leaves treated with the nitric oxide synthase inhibitor.
Intervention effect The expression of catalase genes was suppressed in maize leaves treated with the nitric oxide synthase inhibitor.
Intervention effect Inhibition of nitric oxide synthase-like activity resulted in increased H 2 O 2 content in maize.

Mechanismauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

The authors suggest higher POD and CAT activities probably lowered H2O2 content.

Taxon: ArabidopsisArabidopsise1
Gene: POD and CATe0
Outcome: decrease in H2O2 contente0
Qualifier: probably resulted frome0

Verbatim

e0
“The decrease in H2O2 content probably resulted from the increase in activities of POD and CAT.”
✓ located verbatim in the source · abstract, characters 1280–1374

e1
“Arabidopsis leaves”
✓ located verbatim in the source · abstract, characters 182–200

Title

The Benefits of Exogenous NO: Enhancing Arabidopsis to Resist Botrytis cinerea

Hongyu Yang; Xiaodan Zhao; Jia Wu; et al. American Journal of Plant Sciences 2011. doi:10.4236/ajps.2011.23060

Other claims from this paper (7)

Intervention effect SNP pretreatment suppressed Botrytis cinerea infection development in Arabidopsis leaves.
Intervention effect SNP dose levels had no direct toxic impact on pathogen development.
Intervention effect Exogenous NO restrained ROS generation, especially H2O2, during pathogen interaction.
Association Inhibition of the oxidant burst coincided with delayed infection development in NO-supplied leaves.
Intervention effect CAT and POD activities increased in SNP-only and SNP-pretreated pathogen-inoculated leaves.
Observation SOD activity was unchanged in the studied leaves.
Mechanism The authors suggest NO may trigger enzyme activity that restrains H2O2 and leads to Botrytis resistance.

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

The authors interpret the lower H2O2 content together with higher oxalate content as confirming decreased OxOx activity in CuNPs and Cu2+ supplemented seedlings.

Taxon: SorghumSorghumt0
Treatment: CuNPs and Cu2+e0
Outcome: decreased activity of OxOxe0
Qualifier: decrease in H2O2 contente0

Verbatim

e0
“The decrease in H2O2 content in both CuNPs and Cu2+ supplemented shoot tissues with concomitant increase in oxalate content confirmed the decreased activity of OxOx in CuNPs and Cu2+ supplemented seedling plants”
✓ located verbatim in the source · abstract, characters 1341–1552

t0
“Sorghum”
✓ located verbatim in the source · title, characters 115–122

Title

Infuence of chemically synthesized copper nanoparticles and cupric ions on oxalate oxidation system in germinating Sorghum grain

Indian Journal of Experimental Biology 2020. doi:10.56042/ijeb.v58i01.65105

Other claims from this paper (9)

Intervention effect Growth of sorghum seedlings supplemented with CuNPs was significantly decreased at all growth stages compared with control.
Intervention effect Growth of sorghum seedlings supplemented with Cu2+ was significantly decreased at all growth stages compared with control.
Intervention effect The inhibitory effect of CuNPs on sorghum seedling growth was higher than that of Cu2+.
Intervention effect CuNPs decreased oxalate oxidase (OxOx) activity in sorghum seedlings at day 10.
Intervention effect Cu2+ had no effect on oxalate oxidase (OxOx) activity in sorghum seedlings at day 10.
Intervention effect CuNPs decreased the specific activity of OxOx and the H2O2 content in sorghum seedling shoots at day 10.
Intervention effect Cu2+ decreased the specific activity of OxOx and the H2O2 content in sorghum seedling shoots at day 10.
Intervention effect CuNPs increased total oxalate content in sorghum seedling shoots at day 10.
Intervention effect Cu2+ increased total oxalate content in sorghum seedling shoots at day 10.

“increase of H2O2 content”

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