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Natriuretic peptides and cGMP modulate K+, Na+, and H+ fluxes in Zea mays roots
- Source :
- Molecular cell biology research communications : MCBRC. 2(1)
- Publication Year :
- 1999
-
Abstract
- Recent evidence suggests that in plants, as in vertebrates, natriuretic peptides (NPs) regulate homeostasis. In this study noninvasive ion-selective vibrating microelectrodes were used to measure net fluxes of K+, Na+, and H+ in Zea mays root conductive tissue. Immunoreactant plant natriuretic peptides (irPNP) cause immediate net H+ influx and delayed net K+ and Na+ uptake. Delayed net K+ influx was also observed in response to 8-Br-cGMP, however, not accompanied by significant changes in net H+ fluxes. Furthermore, 8-Br-cGMP does not stimulate the plasma membrane H+-ATPase implying that cGMP directly affects cation channels. The data are consistent with NP and cGMP-dependent stimulation of nonselective cation channels with P(K) > P(Na) and point to a complex role for NPs in plant homeostasis.
- Subjects :
- Affinity label
Immunoblotting
Stimulation
Models, Biological
Plant Roots
Zea mays
Animals
Molecular Biology
Polyacrylamide gel electrophoresis
Cyclic GMP
H fluxes
Plant Proteins
biology
Sodium
Affinity Labels
Cations, Monovalent
Thionucleotides
Rats
Membrane
Biochemistry
biology.protein
Biophysics
Potassium
Electrophoresis, Polyacrylamide Gel
Peptides
Homeostasis
Atrial Natriuretic Factor
Hydrogen
Subjects
Details
- ISSN :
- 15224724
- Volume :
- 2
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Molecular cell biology research communications : MCBRC
- Accession number :
- edsair.doi.dedup.....bcae3ae22df44ede5ee6c164855c6671