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The detection of isokestose and neokestose in plant extracts by 13C-n.m.r. spectroscopy

✍ Scribed by Kathlene L. Forsythe; Milton S. Feather

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
368 KB
Volume
185
Category
Article
ISSN
0008-6215

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✦ Synopsis

Kestoses (D-fructofuranosyl derivatives of sucrose) are produced by a variety of plants, including tulip bulbs l, Jerusalem artichoke2, asparagus3, and banana fruit4. Kestoses have also been reported to be produced by the action of invertase (and related hydrolase enzymes) on incubation with sucrose5-9. In higher plants, kestoses are thought to be produced via the action of a specific enzyme, namely, sucrose-sucrose 1-fructosyltransferase (SST) lo. In this case kestose formation appears to be the first step in the synthesis of D-fructans, which are thought" to be produced by sequential addition of D-fructofuranosyl groups to the kestose by an enzyme system different from SST. Because the type of kestose (or kestoses) produced by a plant species may determine (or be an indicator of) the type of D-fructan that is ultimately synthesized, a reliable method for the detection of these materials 2 Hil CH,OH 1

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