Journalartikel

Jahr der Veröffentlichung: 2010

Seiten: 725-731

Zeitschrift: Journal of Plant Physiology

Bandnummer: 167

Heftnummer: 9

ISSN: 0176-1617

DOI Link: https://doi.org/10.1016/j.jplph.2009.12.018

Verlag: Elsevier

Abstract: 
Cell wall extensibility plays an important role in plant growth. According to the acid-growth theory, lower apoplastic pH allows extension growth by affecting cell wall extensibility. A lowered apoplastic pH is presumed to activate wall-loosening enzymes that control plant growth. Plasma membrane (PM) W-ATPases play a major role in the apoplastic acidification by H. transport from cytosol to the apoplast. A salt-induced decrease in H+-pumping activity of plasma membrane H+-ATPases in salt-sensitive maize plants has previously been found. This led us to formulate the hypothesis that salt-resistant plant species such as sugar beet (Beta vulgaris L.) may have a mechanism to eliminate the effect of higher salt concentrations on plasma membrane H+-ATPase activity. In the present study, sugar beet plants were grown in 1 mM NaCl (control) or 150 mM NaCl in hydroponics. H+-ATPase hydrolytic and pumping activities were measured in plasma membrane vesicles isolated from sugar beet shoots. We found that plasma membrane H+-ATPase hydrolytic and pumping activities were not affected by application of 150 mM NaCl. Moreover, apoplastic pH was also not affected under salt stress. However, a decrease in plant growth was observed. We assume that growth reduction was not due to a decrease in PM-H+-ATPase activity, but that other factors may be responsible for growth inhibition of sugar beet plants under salt stress. (C) 2010 Elsevier GmbH. All rights reserved.

Harvard-Zitierstil: Wakeel, A., Hanstein, S., Pitann, B. and Schubert, S. (2010) Hydrolytic and pumping activity of H+-ATPase from leaves of sugar beet (Beta vulgaris L.) as affected by salt stress, Journal of Plant Physiology, 167(9), pp. 725-731. https://doi.org/10.1016/j.jplph.2009.12.018

APA-Zitierstil: Wakeel, A., Hanstein, S., Pitann, B., & Schubert, S. (2010). Hydrolytic and pumping activity of H+-ATPase from leaves of sugar beet (Beta vulgaris L.) as affected by salt stress. Journal of Plant Physiology. 167(9), 725-731. https://doi.org/10.1016/j.jplph.2009.12.018