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

Elena Mejia-Agueero, Luisa; Galeno, Florangel; Hernandez-Hernandez, Oswaldo; Matehus, Juan and Tovar, Juscelino LU (2012) In Journal of the Science of Food and Agriculture 92(3). p.673-678
Abstract
BACKGROUND: 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... (More)
BACKGROUND: 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 (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
cassava starch, flours, amylose content, resistant starch, amylolysis, rate
in
Journal of the Science of Food and Agriculture
volume
92
issue
3
pages
673 - 678
publisher
Wiley-Blackwell
external identifiers
  • wos:000298798000030
  • scopus:84855349338
ISSN
1097-0010
DOI
10.1002/jsfa.4629
language
English
LU publication?
yes
id
afcab374-b0b8-4502-9ec5-7660f0f5d729 (old id 2348685)
date added to LUP
2012-02-24 10:04:32
date last changed
2017-01-01 05:51:59
@article{afcab374-b0b8-4502-9ec5-7660f0f5d729,
  abstract     = {BACKGROUND: 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 &lt; 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},
  author       = {Elena Mejia-Agueero, Luisa and Galeno, Florangel and Hernandez-Hernandez, Oswaldo and Matehus, Juan and Tovar, Juscelino},
  issn         = {1097-0010},
  keyword      = {cassava starch,flours,amylose content,resistant starch,amylolysis,rate},
  language     = {eng},
  number       = {3},
  pages        = {673--678},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of the Science of Food and Agriculture},
  title        = {Starch determination, amylose content and susceptibility to in vitro amylolysis in flours from the roots of 25 cassava varieties},
  url          = {http://dx.doi.org/10.1002/jsfa.4629},
  volume       = {92},
  year         = {2012},
}