Please use this identifier to cite or link to this item:
|Statistics||SHARE CORE MendeleyBASE||
|Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL|
Aquaporin functionality in relation to H+-ATPase activity in root cells of Capsicumm annuum, L. grown under salinity.
|Authors:||Martínez-Ballesta, M. Carmen ; Martínez, Vicente ; Carvajal, Micaela|
|Publisher:||John Wiley & Sons|
|Citation:||Physiologia Plantarum 117(3): 413-420 (2003)|
|Abstract:||As water and nutrient uptake should be related in the response of plants to salinity, the aim of this paper is to establish whether or not aquaporin functionality is related to H+-ATPase activity in root cells of pepper (Capsicum annuum L.) plants. Thus, H+-ATPase activity was measured in plasma membrane vesicles isolated from roots and aquaporin functionality was measured using a cell pressure probe in intact roots. Salinity was applied as 60 mM NaCl or 60 mM KCl, to determine which ion (Na+, K+ or Cl−) is producing the effects. We also investigated whether the effects of both salts were ameliorated by Ca2+. Similar results were obtained for cell hydraulic conductivity, Lpc, and H+-ATPase activity, large reductions in the presence at NaCl or KCl and an ameliorative effect of Ca2+. However, fusicoccin (an activator of H+-ATPase) did not alter osmotic water permeability of protoplasts isolated from roots. Addition of Hg2+ inhibited both ATPase and aquaporins, but ATPase also contains Hg-binding sites. Therefore, the results indicate that H+-ATPase and aquaporin activities may not be related in pepper plants.|
|Description:||8 pages, 5 figures, 2 tables.|
|Publisher version (URL):||http://dx.doi.org/10.1034/j.1399-3054.2003.00044.x|
|Appears in Collections:||(CEBAS) Artículos|
Files in This Item:
There are no files associated with this item.