Search claims · PlantClaims

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

The total ascorbate amount did not increase after uptake of exogenous ascorbate.

Taxon: potatoSolanum tuberosume1
Treatment: ascorbatee0
Outcome: total amount of ascorbatee0
Direction: did not increasee0

Not reportedComparator

Verbatim

e0
“The total amount of ascorbate did not increase, however, implying modified ascorbate turnover.”
✓ located verbatim in the source · abstract, characters 696–790

e1
“Potato Leaves”
✓ located verbatim in the source · title, characters 24–37

Title

Ascorbate Metabolism in Potato Leaves Supplied with Exogenous Ascorbate

Tsuyoshi Imai; Alison H. Kingston-Smith; Christine H. Foyer Free Radical Research 1999. doi:10.1080/10715769900301471

Other claims from this paper (9)

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Feeding with glucose increased the amount of reduced ascorbate from about 30% to 60% of the foliar ascorbate pool.

Taxon: Nicotiana tabacumNicotiana tabacume0
Treatment: feeding with glucosee4
Outcome: amount of reduced ascorbatee4
Direction: increasede4
Value: from about 30 % to 60 %e4

Not reportedComparator

Verbatim

e0
“mature leaves of tobacco plants ( Nicotiana tabacum ) were detached, fed with glucose (50 mM) via the petiole, and used”
✓ located verbatim in the source · abstract, characters 336–455

e4
“the amount of reduced ascorbate increased from about 30 % to 60 % upon feeding with glucose”
✓ located verbatim in the source · abstract, characters 1224–1315

Title

Carbohydrate Accumulation Affects the Redox State of Ascorbate in Detached Tobacco Leaves

Andrea Polle; Monika Eiblmeier Botanica Acta 1995. doi:10.1111/j.1438-8677.1995.tb00517.x

Other claims from this paper (7)

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Ascorbate amount increased under water stress, by about fivefold.

Taxon: Gossypium hirsutumGossypium hirsutume0
Treatment: water stresse5
Outcome: amount of ascorbatee5
Direction: increasede5
Value: ≈ 5×e5

Not reportedComparator

Verbatim

e0
“The goal of this study was to identify water‐stress‐related limitations in the antioxidant protection in cotton ( Gossypium hirsutum L.) in the field”
✓ located verbatim in the source · abstract, characters 0–149

e5
“The amount of ascorbate and the activity of ascorbate peroxidase were increased under water stress (≈ 5× and 1.5×, respectively)”
✓ located verbatim in the source · abstract, characters 880–1008

Title

Seasonal Patterns of Glutathione and Ascorbate Metabolism in Field‐Grown Cotton under Water Stress

James R. Mahan; Don F. Wanjura Crop Science 2005. doi:10.2135/cropsci2005.0193

Other claims from this paper (7)

Intervention effect Glutathione amount did not respond to the water treatment in field cotton.
Observation Glutathione amount varied more than twofold during the sampling interval.
Intervention effect The reduced/oxidized glutathione ratio varied seasonally but did not respond to water deficits.
Intervention effect Glutathione reductase activity varied about fivefold seasonally but did not respond to water deficits.
Intervention effect Ascorbate peroxidase activity increased under water stress, by about 1.5-fold.
Intervention effect Malondialdehyde amount varied seasonally by about twofold and did not respond to water stress.
Mechanism Antioxidant metabolism under production-condition water deficits was sufficient to protect cotton against oxidative damage.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

The amount of ascorbate in potato leaves was unchanged by aphid infestation.

Taxon: potatoSolanum tuberosumt0
Treatment: infestatione0
Interactor: Myzus persicae SulzerMyzus persicaet1pest
Outcome: amount of ascorbatee0
Direction: unchangede0

Not reportedComparator

Verbatim

e0
“The leaf glutathione pool was increased 48 h after infestation, but the amount of ascorbate was unchanged”
✓ located verbatim in the source · abstract, characters 557–662

t0
“Infestation of potato (Solanum tuberosum L.)”
✓ located verbatim in the source · title, characters 0–44

t1
“Myzus persicae Sulzer”
✓ located verbatim in the source · title, characters 72–93

Title

Infestation of potato (Solanum tuberosum L.) by the peach‐potato aphid (Myzus persicae Sulzer) alters cellular redox status and is influenced by ascorbate

PAVEL I. KERCHEV; BRIAN FENTON; CHRISTINE H. FOYER; et al. Plant Cell & Environment 2011. doi:10.1111/j.1365-3040.2011.02395.x

Other claims from this paper (9)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Dry wheat embryos are devoid of ascorbate (ASC) but contain a low amount of dehydroascorbate (DHA).

Taxon: wheatTriticum aestivumt0
Material: Triticum durum L. cv. Norbae0
Organ / stage: Embryos from dry caryopsese0
Outcome: ascorbate (ASC)e0

Not reportedDirection

Verbatim

t0
“during the early stage of wheat germination”
✓ located verbatim in the source · title, characters 54–97

e0
“Embryos from dry caryopses of wheat ( Triticum durum L. cv. Norba) are completely devoid of ascorbate (ASC) but contain a low amount of dehydroascorbate (DHA)”
✓ located verbatim in the source · abstract, characters 0–158

Title

Ascorbate synthesis and ascorbate peroxidase activity during the early stage of wheat germination

L. De Gara; M. C. de Pinto; O. Arrigoni Physiologia Plantarum 1997. doi:10.1111/j.1399-3054.1997.tb00015.x

Other claims from this paper (11)

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Flushes treated with rokohumin had the largest ascorbate amount, 177.8 mg/g.

Taxon: tea plantse2
Treatment: rokohumine1
Outcome: amount of ascorbatee1
Direction: largeste1
Value: 177.8 mg/ge1

Not reportedComparator

Verbatim

e1
“the largest amount of ascorbate is synthesized in flushes treated with rokohumin (177.8 mg/g) and bombardier (207.9 mg/g)”
✓ located verbatim in the source · abstract, characters 731–852

e2
“limiting the productivity of tea plants”
✓ located verbatim in the source · abstract, characters 102–141

Title

The influence of growth regulators on the tea quality in the foothill zone of the North-West Caucasus

Oksana Belous; Angelina Lagoshina BIO Web of Conferences 2022. doi:10.1051/bioconf/20224708005

Other claims from this paper (5)

Intervention effect Growth regulators increased the accumulation of ascorbic acid in 3-leaf tea flushes by 1.5 to 1.8 times compared with the control option.
Intervention effect Flushes treated with bombardier had the largest ascorbate amount, 207.9 mg/g.
Intervention effect Growth regulators gave a slight increase in extractives, to 32.1-34.9 %, against 31.3 % in the control.
Intervention effect Growth regulators gave a slight increase in tannins, to 21.7 % – 22.9 %, against 20.4 % in the control.
Intervention effect Growth regulators gave significant differences from the control for all analysed characteristics of tea flushes.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Flushes treated with bombardier had the largest ascorbate amount, 207.9 mg/g.

Taxon: tea plantse2
Treatment: bombardiere1
Outcome: amount of ascorbatee1
Direction: largeste1
Value: 207.9 mg/ge1

Not reportedComparator

Verbatim

e1
“the largest amount of ascorbate is synthesized in flushes treated with rokohumin (177.8 mg/g) and bombardier (207.9 mg/g)”
✓ located verbatim in the source · abstract, characters 731–852

e2
“limiting the productivity of tea plants”
✓ located verbatim in the source · abstract, characters 102–141

Title

The influence of growth regulators on the tea quality in the foothill zone of the North-West Caucasus

Oksana Belous; Angelina Lagoshina BIO Web of Conferences 2022. doi:10.1051/bioconf/20224708005

Other claims from this paper (5)

Intervention effect Growth regulators increased the accumulation of ascorbic acid in 3-leaf tea flushes by 1.5 to 1.8 times compared with the control option.
Intervention effect Flushes treated with rokohumin had the largest ascorbate amount, 177.8 mg/g.
Intervention effect Growth regulators gave a slight increase in extractives, to 32.1-34.9 %, against 31.3 % in the control.
Intervention effect Growth regulators gave a slight increase in tannins, to 21.7 % – 22.9 %, against 20.4 % in the control.
Intervention effect Growth regulators gave significant differences from the control for all analysed characteristics of tea flushes.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Copper increased ascorbate oxidase protein abundance.

Taxon: Pumpkint0
Treatment: adding coppere0
Gene: ascorbate oxidase proteine0
Outcome: amount of ascorbate oxidase proteine0
Direction: increasede0

Not reportedComparator

Verbatim

e0
“Furthermore, immunological blotting showed that the amount of ascorbate oxidase protein was also increased by adding copper.”
✓ located verbatim in the source · abstract, characters 1482–1606

t0
“Pumpkin”
✓ located verbatim in the source · title, characters 46–53

Title

Regulation of Ascorbate Oxidase Expression in Pumpkin by Auxin and Copper

Muneharu Esaka; Kouichi Fujisawa; Miwa Goto; et al. PLANT PHYSIOLOGY 1992. doi:10.1104/pp.100.1.231

Other claims from this paper (16)

Observation Leaf ascorbate oxidase activity was about twice fruit activity.
Observation Stem ascorbate oxidase activity was about 1.5 times fruit activity.
Observation Seeds had little ascorbate oxidase activity.
Observation Ascorbate oxidase mRNA was abundant in pumpkin leaves and stems.
Observation Fruit ascorbate oxidase mRNA was lower than in leaves and stems.
Observation Ascorbate oxidase mRNA was undetected in pumpkin seeds.
Observation Specific ascorbate oxidase activity rose during early seedling growth.
Observation Ascorbate oxidase mRNA also increased during early seedling growth.
Observation Immature rapidly growing pumpkin fruits had much higher ascorbate oxidase activity than mature fruits.
Intervention effect 2,4-D increased ascorbate oxidase activity in cultured pumpkin fruit tissue.
Intervention effect 2,4-D increased ascorbate oxidase mRNA in cultured pumpkin fruit tissue.
Intervention effect Ascorbate oxidase mRNA was most abundant at 10 mg/L 2,4-D.
Mechanism The authors infer that ascorbate oxidase participates in cell growth.
Intervention effect Copper increased ascorbate oxidase activity in pumpkin callus.
Intervention effect Copper did not increase ascorbate oxidase mRNA.
Mechanism Copper may regulate ascorbate oxidase at translation or a later step.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Transgenic kernels contained 6-fold the normal amount of ascorbate.

Taxon: cornZea mays subsp. mayse0
Material: elite inbred South African transgenic corn plantse0
Organ / stage: kernelse1
Treatment: simultaneous modification of 3 separate metabolic pathwayse0
Outcome: amount of ascorbatee1
Direction: increasede0
Value: 6-folde1
Comparator: the normal amount of ascorbatee1

Verbatim

e0
“We created elite inbred South African transgenic corn plants in which the levels of 3 vitamins were increased specifically in the endosperm through the simultaneous modification of 3 separate metabolic pathways”
✓ located verbatim in the source · abstract, characters 334–544

e1
“The transgenic kernels contained 169-fold the normal amount of beta-carotene, 6-fold the normal amount of ascorbate, and double the normal amount of folate”
✓ located verbatim in the source · abstract, characters 546–701

Title

Transgenic multivitamin corn through biofortification of endosperm with three vitamins representing three distinct metabolic pathways

Shaista Naqvi; Changfu Zhu; Gemma Farre; et al. Proceedings of the National Academy of Sciences 2009. doi:10.1073/pnas.0901412106

Other claims from this paper (4)

Intervention effect Transgenic kernels contained 169-fold the normal amount of beta-carotene.
Intervention effect Transgenic kernels contained double the normal amount of folate.
Observation Levels of engineered vitamins remained stable at least through the T3 homozygous generation.
Observation The achievement vastly exceeds any vitamin enhancement realized thus far by conventional breeding alone.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Decreased AO activity increased ascorbate relative to dehydroascorbate.

Taxon: TobaccoNicotiana tabacumt0
Treatment: decreased AO activitye0
Outcome: amount of AAe0
Direction: increasede0
Comparator: dehydroascorbatee0

Verbatim

e0
“decreased AO activity increased the amount of AA compared with dehydroascorbate.”
✓ located verbatim in the source · abstract, characters 1144–1224

t0
“Tobacco”
✓ located verbatim in the source · title, characters 37–44

Title

The Function of Ascorbate Oxidase in Tobacco

Cristina Pignocchi; John M. Fletcher; Joy E. Wilkinson; et al. PLANT PHYSIOLOGY 2003. doi:10.1104/pp.103.022798

Other claims from this paper (14)

Observation Light upregulated AO mRNA in tobacco.
Observation APX1 transcripts were highest in light.
Observation L-galactono-gamma-lactone dehydrogenase transcripts stayed constant over day and night.
Observation Stromal and thylakoid APX transcripts stayed constant over day and night.
Intervention effect Salicylic acid inhibited tobacco growth.
Intervention effect Salicylic acid increased PR1a expression.
Intervention effect Salicylic acid decreased AO transcript abundance.
Intervention effect Auxin enhanced tobacco growth.
Intervention effect Auxin increased AO and PR1a expression.
Intervention effect Large AO activity changes had little effect on whole leaf ascorbate content.
Intervention effect Altered AO activity had dramatic effects on apoplastic ascorbate levels.
Intervention effect Enhanced AO activity oxidized the apoplastic ascorbate pool.
Association AO activity was related to tobacco height and biomass.
Intervention effect Native AO transcripts lost light/dark regulation in AO sense and antisense tobacco plants.

“amount of ascorbate”

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