Abstract
Effects of indoleacetic, abscisic, gibberellic acids and kinetin on the hydrolytic activity of the proton pumps H+-ATPase (EC 3.6.1.3) and H+-pyrophosphatase (EC 3.6.1.1) under non-optimal ionic conditions were studied in tonoplasts isolated from stored roots of red beet (Beta vulgaris L. cv. Bordo). We showed that ionic composition markedly affected the hormonal regulation. H+-pyrophosphatase was more sensitive to the ionic and hormonal regulation than H+-ATPase. Magnesium ions are essential for the maximal manifestation of hormonal stimulation.
Publication types
-
Research Support, Non-U.S. Gov't
MeSH terms
-
Abscisic Acid / pharmacology
-
Adenine / analogs & derivatives*
-
Adenine / pharmacology
-
Beta vulgaris / cytology
-
Beta vulgaris / enzymology*
-
Gibberellins / pharmacology
-
Indoleacetic Acids / pharmacology
-
Inorganic Pyrophosphatase
-
Kinetin
-
Magnesium / metabolism
-
Plant Growth Regulators / pharmacology
-
Plant Roots / drug effects
-
Plant Roots / enzymology*
-
Plant Roots / metabolism
-
Potassium / metabolism
-
Proton-Translocating ATPases / metabolism*
-
Pyrophosphatases / metabolism*
-
Vacuoles / metabolism
Substances
-
Gibberellins
-
Indoleacetic Acids
-
Plant Growth Regulators
-
indoleacetic acid
-
Abscisic Acid
-
gibberellic acid
-
Pyrophosphatases
-
Inorganic Pyrophosphatase
-
Proton-Translocating ATPases
-
Magnesium
-
Adenine
-
Kinetin
-
Potassium