Fructansynthesisandmetabolismingrassesandcerealsarecomplex. Fructansconsistoflinearor branchedfructosechainsattachedtosucrose. Thechainlengthofplantfructansrangesfromthreeuptoa fewhundredfructoseunits. Differenttypesoffructanscanbedistinguishedbasedonthelinkagetypes present. Inperennialryegrass,threetypesoffructanshavebeenidentified: inulins,inulinneoseriesand levanneoserieswithfourfructosyltransferse(FT)enzymesinvolvedinthisfructanprofile