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Natriuretic Peptides and cGMP Modulate K+, Na+, and H+ Fluxes in Zea mays Roots
Citation
Pharmawati, M and Shabala, SN and Newman, IA and Gehring, CA, Natriuretic Peptides and cGMP Modulate K+, Na+, and H+ Fluxes in Zea mays Roots, Molecular Cell Biology Research Communications, 2, (1) pp. 53-57. ISSN 1522-4724 (1999) [Refereed Article]
DOI: doi:10.1006/mcbr.1999.0151
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 PK > PNa and point to a complex role for NPs in plant homeostasis. © 1999 Academic Press.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Physical Sciences |
| Research Group: | Other Physical Sciences |
| Research Field: | Biological Physics |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding Knowledge |
| Objective Field: | Expanding Knowledge in the Environmental Sciences |
| UTAS Author: | Shabala, SN (Professor Sergey Shabala) |
| UTAS Author: | Newman, IA (Dr Ian Newman) |
| ID Code: | 17410 |
| Year Published: | 1999 |
| Deposited By: | Physics |
| Deposited On: | 1999-08-01 |
| Last Modified: | 2011-11-21 |
| Downloads: | 0 |
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