Author:
Etxeberria Ed,Gonzalez Pedro
Abstract
The mechanisms of sucrose uptake into the vacuole and sucrose efflux from the vacuole were studied using tonoplast vesicles from red beet at two distinct developmental stages. Vesicles from both developing and mobilizing hypocotyls (sucrose uptake and efflux, respectively) accumulated sucrose against a concentration gradient. However, higher rates and maximal levels of sucrose accumulation were obtained with tonoplast from developing hypocotyls. ATP-dependent sucrose efflux was more pronounced in vesicles from mobilizing hypocotyls. Despite the apparent overlapping, the data indicate that the physiological mechanisms for sucrose uptake and sucrose efflux are separated in time and governed by the developmental state of the cell. Chemical name used: adenosine 5′-triphosphate (ATP).
Publisher
American Society for Horticultural Science
Cited by
3 articles.
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