Abstract
The contribution that isolated vacuoles have made to understanding sucrose storage and mobilization is reviewed briefly, with particular reference to the storage root of red beet (Beta vulgaris L.). Work with isolated vacuoles has shown that in this tissue sucrose is confined to the vacuole and some progress has been made in elucidating the possible mechanism of sucrose transport into the vacuole. The evidence that this is a H+: sucrose antiport, dependent on the activity of a proton-translocating ATPase is examined. It is concluded that while there is some evidence for the presence of a proton pump, a link between this and sucrose uptake has still to be established. Using isolated vacuoles it has been demonstrated that during mobilization of sucrose, hydrolysis occurs within the vacuole but the mechanism of unloading of hexoses from the vacuole remains to be elucidated.
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Leigh, R.A. The role of the vacuole in the accumulation and mobilization of sucrose. Plant Growth Regul 2, 339–346 (1984). https://doi.org/10.1007/BF00027293
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DOI: https://doi.org/10.1007/BF00027293