Determination of phosphoryl‐oligosaccharides obtained from Canna edulis Ker starch

Abstract

Phosphoryl oligosaccharides (POs) are a new type of functional oligosaccharide that promote the absorption of calcium. Canna edulis Ker (edible canna) starch contains a small amount of phosphorus and may be a source in the production of POs. Herein, the POs fraction was separated from Canna edulis Ker starch for the first time using enzymatic reactions that produce isomalto-oligosaccharides (IMOs). Fourier transform infrared (FT-IR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, and high-performance anion exchange chromatography (HPAEC) were used to determine the presence and composition of the isolated POs. The POs that were obtained from Canna edulis Ker starch were mainly composed of phosphoryl maltotriose, maltotetraose, maltopentaose, maltohexaose, and maltoheptaose. These findings provide new insight into the simultaneous production of IMOs and POs from Canna edulis Ker starch by enzymatic reaction.

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“…Moreover, the Fourier transform infrared (FTIR) spectra in Fig. 2E indicate that FMSMs inherit abundant surface functional groups (especially amine and carboxyl groups) from the individual components, and these spectra are similar to the spectra of oligosaccharides in the reported publications ( 24 , 25 ). These similarities might originate from the formation of oligosaccharides and the related derivative groups on the surface of the CDs during the low-temperature hydrothermal process ( 26 , 27 ).…”