Journal
JOURNAL OF PLANT PHYSIOLOGY
Volume 165, Issue 6, Pages 623-630Publisher
ELSEVIER GMBH
DOI: 10.1016/j.jplph.2007.05.010
Keywords
Helianthus annuus; Oleo europaea; potassium starvation; stomatal conductance; water stress
Categories
Ask authors/readers for more resources
The effect of potassium starvation on stomatal. conductance was studied in olive trees and sunflower plants, two major crops with greatly differing botanical characteristics. In both species, K+ starvation inhibited water-stress-induced stomatal. closure. In olive trees, potassium starvation favoured stomatal. conductance and transpiration, as well as inhibiting shoot growth, in the three cultivars studied: 'Lechin cle Granada', 'Arbequina' and 'Chetoui'. However, 'Lechin cle Granada' - generally considered more drought-tolerant than 'Arbequina' and 'Chetoui' - proved less susceptible to potassium starvation. Results for olive trees a(so suggest genetic variability in olive cultivars in relation to potassium requirements for stem growth and the regulation of water transpiration. The results obtained suggest that inhibition of the stomalal closure mechanism produced by moderate potassium starvation is a widespread plant physiological disorder, and may be the cause of tissue dehydration in many water-stressed crops. (C) 2007 Elsevier GmbH. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available