Oligosacharidų kiekio kitimas topinambų (Helianthus tuberosus L.) stiebagumbiuose augimo metu

Abstract

Survey‘s purpose: to investigate and assess the change of oligosaccharide’s quantity in Jerusalem artichoke tubers during growth. Tests were carried out in ASU Food raw materials and zootechnical researches laboratory in 2014. The treatments of two-factor experiment: A factor – cultivar, B factor – stage of organogenesis. Breeds: 1 – 'Sauliai', 2 – 'Albik', 3 – 'Rubik'. Stages of organogenesis: 1 – VI – VIII, 2 – IX – X, 3 – XI, 4 – XII. By standardized method have been identified dry matter content and measured amount of inulin by spectrophotometric method. Comparing with other breeds, in all the stages of organogenesis reliably the most inulin was identified in 'Sauliai' tubers, this amount tendentiously increased until the end of vegetation (from 23.6% at the beginning of vegetation to 44.1% at the end). Meanwhile in others breeds tubers the quantity of inulin changed similarly. The reliably least quantity of inulin was identified in late breeds’ ('Albik' and 'Rubik') tubers on IX – X stages of organogenesis (14.9% and 12.4% respectively) during the survey. Reliably most quantity of inulin was identified at the end of vegetation in late breed’s tubers – 31% in 'Albik' and 29.9% in 'Rubik'.