ABA Uptake in Source and Sink Tissues of Sugar Beet
- 1 June 1983
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 72 (2) , 430-433
- https://doi.org/10.1104/pp.72.2.430
Abstract
The mode of abscisic acid (ABA) uptake was studied in excised leaf and root tissue discs of sugar beet (Beta vulgaris L.). Discs were incubated in buffered medium that contained 1 mm CaCl2 and [14C]ABA. The sensitivity of ABA uptake to metabolic inhibitors and temperature indicated that the ABA transport system had an energy-dependent component. Energy-dependent uptake was greater in leaf than in root tissue (70% and 50%, respectively). Energy-dependent uptake by both tissues and passive uptake by root tissues were highly pH dependent. Maximal uptake was observed at pH 5.5. Leaf tissue incubated in the dark showed a 50% reduction of uptake as compared with tissue under light. The decrease was due to reduced passive uptake.This publication has 4 references indexed in Scilit:
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- The Intracellular Location of Abscisic Acid in Stressed and Non-Stressed Leaf TissuePhysiologia Plantarum, 1977