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Starch determination, amylose content and susceptibility to in vitro amylolysis in flours from the roots of 25 cassava varieties

In English

Författare

  • Luisa Elena Mejia-Aguero
  • Florangel Galeno
  • Oswaldo Hernandez-Hernandez
  • Juan Matehus
  • Juscelino Tovar

Summary, in English

Cassava cultivars are classified following different criteria, such as cyanogenic glucoside content or starch content. Here, flours from the roots of 25 cassava varieties cultivated simultaneously in a single plantation, were characterized in terms of starch content (SC), amylose content (AC), alpha-amylolysis index (AI) and gel formation ability. Resistant starch content (RS) was measured in 10 of the samples. RESULTS: Cassava flours exhibited high SC, low AC and low AI values, with differences among varieties. Cluster analysis based on these parameters divided the cultivars in four groups differing mainly in SC and AC. AI and AC were inversely correlated (r = -0.59, P < 0.05) in 18 of the cultivars, suggesting AC as an important factor governing the susceptibility to enzymatic hydrolysis of starch in raw cassava. Differences in susceptibility to amylolysis, assessed by RS, were also recorded in the sample subset analyzed. Most flours yielded pastes or gels upon heating and cooling. Gels differed in their subjective grade of firmness, but none exhibited syneresis, confirming the low retrogradation proclivity of cassava starch. CONCLUSION: Some differences were found among cassava samples, which may be ascribed to inter-cultivar variation. This informationmay have application in further agronomic studies or for developing industrial uses for this crop. (C) 2011 Society of Chemical Industry

Avdelning/ar

  • Food for Health Science Centre

Publiceringsår

2012

Språk

Engelska

Sidor

673-678

Publikation/Tidskrift/Serie

Journal of the Science of Food and Agriculture

Volym

92

Issue

3

Dokumenttyp

Artikel i tidskrift

Förlag

Wiley-Blackwell

Ämne

  • Agricultural Science, Forestry and Fisheries

Nyckelord

  • cassava starch
  • flours
  • amylose content
  • resistant starch
  • amylolysis
  • rate

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1097-0010