Search claims · PlantClaims

Observationobservedoriginal resultmeasured

Claim · model-written summary

total leaf activity in greening maize leaves: After illumination of dark-grown seedlings, the total leaf activity shows a rapid increase (1.5-fold within 2 h)

Taxon: MaizeZea mayst0
Outcome: total leaf activitye0
Value: 1.5-folde0

Verbatim

e0
“After illumination of dark-grown seedlings, the total leaf activity shows a rapid increase (1.5-fold within 2 h)”
✓ located verbatim in the source · abstract, characters 949–1061

t0
“Maize Leaf”
✓ located verbatim in the source · title, characters 67–77

Title

Isoforms of NADP-dependent Malic Enzyme in Tissues of the Greening Maize Leaf

SANDRA SCAGLIARINI; PAOLO PUPILLO; VINCENZO VALENTI Journal of Experimental Botany 1988. doi:10.1093/jxb/39.8.1109

Other claims from this paper (10)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Total azocollase activity gradually increased during leaf maturation, when leaf protein and chlorophyll increased.

Taxon: SoybeanGlycine maxt0
Organ / stage: leaf maturatione3
Outcome: total azocollase activitye3
Direction: gradually increasede3

Verbatim

t0
“Soybean”
✓ located verbatim in the source · title, characters 33–40

e3
“total azocollase activity gradually increased during leaf maturation when leaf protein and chlorophyll increased”
✓ located verbatim in the source · abstract, characters 488–600

Title

Azocoll-digesting Proteinases in Soybean Leaves

La Verne Ragster; Maarten J. Chrispeels PLANT PHYSIOLOGY 1979. doi:10.1104/pp.64.5.857

Other claims from this paper (17)

Observation Two different endopeptidases that digest the chromogenic substrate Azocoll were found in soybean leaves.
Observation Azocollase A has a molecular weight of 17,500.
Observation Azocollase A has a pI of 6.0.
Observation Azocollase B has a molecular weight of 52,000.
Observation Azocollase B has a pI of 9.0.
Observation Both azocollases digest Azocoll optimally at pH 9.0.
Intervention effect Azocollase A is inhibited by 3 millimolar EDTA.
Intervention effect Azocollase B is inhibited by 100 micromolar parachloromercuribenzoate.
Observation Total azocollase activity then declined again during leaf senescence.
Observation Young leaves that are still expanding contain mostly azocollase B and little azocollase A.
Observation Leaf maturation was associated with a dramatic 40- to 50-fold increase in azocollase A, which occurred in the 2- to 3-week period following leaf expansion.
Observation During leaf maturation azocollase B activity increased more slowly than azocollase A.
Observation Azocollase A, separated from other proteinases by gel filtration, digested denatured leaf protein and casein, releasing free alpha-amino groups.
Observation Autodigestion of leaf extracts at pH 9.0 broke down leaf proteins, releasing free alpha-amino groups and causing endopeptidic cleavage of polypeptides.
Intervention effect Polypeptide cleavage in leaf extracts was not inhibited by parachloromercuribenzoate.
Intervention effect Polypeptide cleavage in leaf extracts was not inhibited by EDTA.
Mechanism The authors concluded that the azocollases do not play a major role in the hydrolysis of leaf proteins in crude extracts.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Pressure decreased leaf total proteolytic activity.

Taxon: peaLathyrus oleraceust0
Outcome: total proteolytic activitye0
Direction: decreasede0

Not reportedTreatmentComparator

Verbatim

e0
“total proteolytic activity decreased”
✓ located verbatim in the source · abstract, characters 1110–1146

t0
“pea”
✓ located verbatim in the source · title, characters 33–36

Title

Effect of high pressure on green pea seeds germination and plantlets development

Elisabete M. C. Alexandre; Andreia M. Carvalho; Jorge A. Saraiva High Pressure Research 2013. doi:10.1080/08957959.2013.843173

Other claims from this paper (9)

Intervention effect High pressure retarded the onset of pea germination.
Intervention effect High pressure inhibited pea seeds from germinating.
Intervention effect Pressure increased root length.
Intervention effect Pressure decreased stem length.
Intervention effect Pressure decreased the number of leaves per germinated seed.
Intervention effect Pressure significantly reduced seed total proteolytic activity at 0 h imbibition.
Intervention effect Pressure increased leaf POD activity.
Intervention effect Pressure increased leaf PPO activity.
Intervention effect Pressure increased leaf PME activity only at 12 h imbibition.

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Total Rubisco activity increased linearly throughout the leaf N range.

Taxon: AppleMalus domesticat0
Organ / stage: leafe0
Gene: Rubiscoe0
Outcome: total Rubisco activitye0
Direction: increasede0

Verbatim

t0
“Apple”
✓ located verbatim in the source · title, characters 64–69

e0
“total Rubisco activity increased linearly with increasing leaf N throughout the leaf N range”
✓ located verbatim in the source · abstract, characters 788–880

Title

The Relationship between Rubisco Activity and Photosynthesis in Apple Leaves with Different Nitrogen Content

Lailiang Cheng; Leslie H. Fuchigami HortScience 1997. doi:10.21273/hortsci.32.3.530e

Other claims from this paper (8)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Total azocollase activity then declined again during leaf senescence.

Taxon: SoybeanGlycine maxt0
Organ / stage: leaf senescencee3
Outcome: total azocollase activitye3
Direction: declined againe3

Verbatim

t0
“Soybean”
✓ located verbatim in the source · title, characters 33–40

e3
“total azocollase activity gradually increased during leaf maturation when leaf protein and chlorophyll increased, and then declined again during leaf senescence”
✓ located verbatim in the source · abstract, characters 488–648

Title

Azocoll-digesting Proteinases in Soybean Leaves

La Verne Ragster; Maarten J. Chrispeels PLANT PHYSIOLOGY 1979. doi:10.1104/pp.64.5.857

Other claims from this paper (17)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Total nitrate reductase activity per leaf peaked at full leaf size.

Taxon: Phaseolus vulgarisPhaseolus vulgarist0
Organ / stage: full sizee0
Outcome: total activity (per leaf)e0
Direction: maximale0

Verbatim

t0
“Phaseolus vulgaris L.”
✓ located verbatim in the source · title, characters 69–90

e0
“total activity (per leaf) was maximal when the leaf reached full size”
✓ located verbatim in the source · abstract, characters 300–369

Title

Seasonal Patterns of Nitrate Reductase and Nitrogenase Activities in Phaseolus vulgaris L.

Alvilio A. Franco; Joao C. Pereira; Carlos A. Neyra PLANT PHYSIOLOGY 1979. doi:10.1104/pp.63.3.421

Other claims from this paper (12)

Observation Leaf nitrate reductase activity per fresh weight peaked early in leaf development.
Observation Most nitrate reductase activity in mature plants was in upper leaves.
Observation Nitrogenase activity began about two weeks after sowing.
Observation Nitrogenase activity peaked at flowering five weeks after sowing.
Observation Nitrogenase activity declined rapidly after flowering.
Association Nitrogenase activity tracked nodule development.
Observation After flowering, stem nitrate content increased.
Observation Leaves maintained high nitrate reductase activity after flowering.
Observation Total plant nitrate reductase activity peaked after flowering.
Intervention effect Ammonium nitrate added at flowering raised nitrate reductase activity through most pod filling.
Intervention effect Ammonium nitrate at flowering increased seed yield by 59% over control.
Mechanism The authors propose that the plant benefits from nitrogen fixation and nitrate assimilation, with nitrate reductase important after flowering.

Associationobservedoriginal resultmeasured

Claim · model-written summary

The ratio of total Rubisco activity to leaf nitrogen increased with leaf nitrogen.

Taxon: appleMalus domesticat0
Gene: Rubiscoe0
Compound: leaf Ne0
Outcome: ratio of total Rubisco activity to leaf Ne0
Direction: increasede0

Verbatim

e0
“the ratio of total Rubisco activity to leaf N increased with increasing leaf N”
✓ located verbatim in the source · abstract, characters 1505–1583

t0
“apple leaves”
✓ located verbatim in the source · title, characters 71–83

Title

Rubisco activation state decreases with increasing nitrogen content in apple leaves

Lailiang Cheng; Leslie H. Fuchigami Journal of Experimental Botany 2000. doi:10.1093/jexbot/51.351.1687

Other claims from this paper (8)

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Total Rubisco activity rose linearly as leaf nitrogen increased.

Taxon: appleMalus domesticat0
Gene: Rubiscoe0
Compound: leaf Ne0
Outcome: total Rubisco activitye0
Direction: increased linearlye0

Verbatim

e0
“total Rubisco activity increased linearly with increasing leaf N throughout the leaf N range”
✓ located verbatim in the source · abstract, characters 885–977

t0
“apple leaves”
✓ located verbatim in the source · title, characters 71–83

Title

Rubisco activation state decreases with increasing nitrogen content in apple leaves

Lailiang Cheng; Leslie H. Fuchigami Journal of Experimental Botany 2000. doi:10.1093/jexbot/51.351.1687

Other claims from this paper (8)

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Stomatal function appeared independent of total leaf Rubisco activity.

Taxon: Tobacco PlantsNicotiana tabacumt0
Outcome: stomatal function is independent of total leaf Rubisco activitye0
Qualifier: total leaf Rubisco activitye0

Verbatim

e0
“These results suggest that stomatal function is independent of total leaf Rubisco activity.”
✓ located verbatim in the source · abstract, characters 1725–1816

t0
“Tobacco Plants”
✓ located verbatim in the source · title, characters 123–137

Title

Reduction of Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase Content by Antisense RNA Reduces Photosynthesis in Transgenic Tobacco Plants

Graham S. Hudson; John R. Evans; Susanne von Caemmerer; et al. PLANT PHYSIOLOGY 1992. doi:10.1104/pp.98.1.294

Other claims from this paper (11)

Intervention effect Extractable Rubisco activity in antisense leaves was 18% of controls.
Intervention effect Leaf soluble protein was reduced in proportion to Rubisco.
Intervention effect Phosphoribulokinase activity, electron transport and chlorophyll content changed little.
Observation Carbonic anhydrase activity declined significantly.
Intervention effect Antisense plant CO2 assimilation fell by 63%.
Observation Rubisco limited assimilation across a broad range of intercellular CO2 pressure in antisense plants.
Observation In control leaves Rubisco limited assimilation below 400 microbars.
Intervention effect Stomatal conductance did not decline in antisense plants.
Observation Stomata still responded to intercellular CO2 changes.
Mechanism Unchanged conductance and lower assimilation resulted in higher intercellular CO2.
Observation Antisense leaves showed greater carbon isotope discrimination.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Total proteolytic activity increased during leaf expansion and maturation.

Taxon: SoybeanGlycine maxt0
Organ / stage: leaf expansion and maturatione0
Outcome: total proteolytic activitye0
Direction: increasede0

Verbatim

e0
“total proteolytic activity, measured by either method, increased during leaf expansion and maturation”
✓ located verbatim in the source · abstract, characters 1131–1232

t0
“Soybean Leaves”
✓ located verbatim in the source · title, characters 35–49

Title

Autodigestion in Crude Extracts of Soybean Leaves and Isolated Chloroplasts as a Measure of Proteolytic Activity

Laverne E. Ragster; Maarten J. Chrispeels PLANT PHYSIOLOGY 1981. doi:10.1104/pp.67.1.104

Other claims from this paper (8)

Method / resource Temperature, pH, developmental stage and inhibitors had method-dependent effects on apparent proteolysis.
Method / resource The ninhydrin method preferentially detected exopeptidase activity.
Mechanism Large-subunit disappearance on gels was primarily due to endopeptidases.
Observation The two proteolysis types differed in sensitivity to proteinase inhibitors.
Observation Total proteolytic activity decreased during senescence.
Intervention effect Incubating intact chloroplasts at 37 C broke down the large RuBPcase subunit.
Method / resource No measurable proteinase activity was detected by alpha-amino-nitrogen release in incubated chloroplasts.
Method / resource No acid proteinase activity was detected in chloroplasts using hemoglobin.

“total leaf activity”

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