Claim · model-written summary
Vacuolar potential of C. communis guard cells responded to ionic strength changes in the bathing medium in a Nernstian manner.
- Taxon
- C. communis
Commelina communise6 - Treatment
- changes in the ionic strength in the bathing mediume6
- Outcome
- vacuolar potentiale6
- Qualifier
- in a Nernstian mannere6
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The vacuolar potential of guard cells of C. communis was almost linearly related to stomatal aperture and responded to changes in the ionic strength in the bathing medium in a Nernstian manner”
Title
Electrical Potentials in Stomatal Complexes
Robert A. Saftner; Klaus Raschke PLANT PHYSIOLOGY 1981. doi:10.1104/pp.67.6.1124
Other claims from this paper (12)
- Observation The guard cell wall developed a Donnan potential between -60 and -70 mV in 30 mM KCl at pH 7.
- Observation The density of fixed charges in the guard cell wall ranged from 0.3 to 0.5 molar.
- Association The pH dependence of the wall fixed-charge density was almost identical to the titration curve of polygalacturonic acid.
- Association Vacuolar potential of C. communis guard cells was almost linearly related to stomatal aperture.
- Observation Guard cell potential showed no specificity for alkali ions (except Li+), ammonium or choline.
- Association Lithium caused hyperpolarization of guard cells.
- Association Calcium at 1 to 100 millimolar in the medium led to stomatal closure.
- Association Calcium at 1 to 100 millimolar in the medium caused hyperpolarization of guard cells.
- Observation Calcium at 1 to 100 millimolar triggered transient oscillations in the intracellular potential of guard cells.
- Observation Gradients in the electrical potential existed across stomatal complexes with open pores.
- Observation When stomata closed, the potential gradients across stomatal complexes almost disappeared or slightly reverted.
- Observation With stomata closed, all epidermal cells were at potentials near -30 mV in 30 mM KCl.