On the presence of starch bound phosphate in potato leaf starch

Abstract

The presence of starch-bound phosphate in potato leaves collected late afternoon in the middle of July when the starch content is high (12.9% dry matter basis) was studied. Starch was extracted from the leaves with dimethylsulphoxide and fragments of starch were purified by ultrafiltration in two steps in combination with an alpha-amylase hydrolysis. The fragments were analysed with P-31-NMR and no signals corresponding to phosphate monoesters linked to glucose at the C-3 and/or C-6 positions were detected. The results show that starch in potato leaves does not contain any detectable amounts of phosphate monoesters. (c) 2004 Published by Elsevier Ltd.

Keywords

leaf starch; phosphate monoesters; starch extraction; P-31-NMR; ultrafiltration

Published in

Carbohydrate Polymers
2005, volume: 59, number: 4, pages: 537-539
Publisher: ELSEVIER SCI LTD

SLU Authors

• Santacruz, Stalin

  • Department of Molecular Sciences, Swedish University of Agricultural Sciences
    

• Andersson, Roger

  • Department of Molecular Sciences, Swedish University of Agricultural Sciences
    

• Åman, Per

  • Department of Molecular Sciences, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Food Science

Publication identifier

• DOI: https://doi.org/10.1016/j.carbpol.2004.09.020

Permanent link to this page (URI)

https://res.slu.se/id/publ/7151