Abstract
The presence of membrane-bound, potassium/ hydrogen, adenosine triphosphatases in the vegetative and reproductive tissues of grapevines is proposed. The expected role of this enzyme system in the uptake of monovalent metal cations by the roots and the influx of these ions into leaf and berry tissue are discussed. The influences of rootstock, cropping level, water status and mineral nutrition on the pH and titratable acidity of grape juices are interpreted in terms of the activity of this enzyme in grape tissue.
- Received February 1980.
- Revision received May 1980.
- Accepted May 1980.
- Published online January 1980
- Copyright 1980 by the American Society for Enology and Viticulture
Sign in for ASEV members
ASEV Members, please sign in at ASEV to access the journal online.
Sign in for Institutional and Non-member Subscribers
Log in using your username and password
Pay Per Article - You may access this article (from the computer you are currently using) for 2 day for US$10.00
Regain Access - You can regain access to a recent Pay per Article purchase if your access period has not yet expired.