Claim · model-written summary
The ammonium-N responsive root PEP carboxylase was similar to leaf-blade PEP carboxylase of C3 plants in many aspects.
- Taxon
- Crop Speciest0
- Outcome
- ammonium-N responsive root PEP carboxylasee7
- Qualifier
- in many aspectse7
- Comparator
- leaf blades of C3 plantse7
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingDirectionValue
Verbatim
t0“Different Crop Species”
e7“the ammonium-N responsive root PEP carboxylase was similar to the same enzyme from leaf blades of C3 plants in many aspects”
Title
D. J. Liu; C. S. Wang; Ma Wei 中華農業研究 1987. doi:10.29951/jarc.198709.0006
Other claims from this paper (11)
- Intervention effect Crops grew better with nitrate N than with ammonium N.
- Intervention effect Shoots of rice and wheat gained more fresh weight with ammonium N.
- Intervention effect Ammonium N increased PEP carboxylase activity of various crops by 8-61% in the leaf blade.
- Intervention effect Ammonium N increased PEP carboxylase activity in the root by as much as 4.5 folds.
- Intervention effect Ammonium-N at a very low concentration significantly enhanced root PEP carboxylase activity.
- Observation Optimal pH for rice root PEP carboxylase was between 8.0 and 8.5 in Tris-HCl or Hepes-KOH buffer.
- Observation PEP carboxylase from the roots of Tainung 67 rice showed no decrease in enzyme activity up to 7 hours after extraction.
- Observation The velocity versus PEP concentration response curve was hyperbolic at pH 8.0.
- Observation The velocity versus PEP concentration response curve was sigmoid at pH 7.0.
- Observation Reciprocal plots of the data were linear, indicating Michaelis-Menten kinetics.
- Observation The Km for PEP of root PEP carboxylase was 0.16 mM at pH 8.0.