Classification of Grass Fructans by 13C NMR Spectroscopy.

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Abstract
Fructans have been extracted with water from rough meadowgrass and bromegrass and from roots of reed canarygrass and quackgrass. The fructans were precipitated by the addition of ethanol to the extracts. 13C NMR spectroscopy showed that the reed canarygrass fructan, like that from rough meadowgrass, is a linear, long-chain levan. The spectrum of the fructan from quackgrass is in accordance with an extensively branched structure, whereas the bromegrass fructan is a more moderately branched short-chain levan.