Chemical composition and microstructure of two naked waxy barleys

A. Andersson, R. Andersson, Karin Autio, Per Åman

Research output: Contribution to journalArticleScientificpeer-review

43 Citations (Scopus)

Abstract

Two naked waxy barley cultivars, Bz 489-30 and Prowashonupana were analysed in order to study the chemical composition and the microstructure. Prowashonupana contained more protein, fat and ash, and less starch than Bz 489-30. The content of mixed-linked β-glucan was almost three times higher in Prowashonupana (14·9%) than in Bz 489-30 (5·6%), but extractability at 40 °C was much lower. Microscopy studies showed that kernels and endosperm cells of Prowashonupana were irregular, and that cell walls were thicker with a higher content of mixed-linked β-glucan than in Bz 489-30. In both barleys the sub-aleurone layer contained black starch granules, indicating a higher amylose content in this structure compared to the rest of the kernel. Starch was isolated from both barleys using two different procedures and analysed for amylose content. The amylose content was higher, while volume % of A-granules was lower and mean diameter of A-granules was smaller in starch isolated from Prowashonupana than from Bz 489-30. Both composition and yield of starch were however influenced by the isolation procedure used. The procedure which gave higher starch yield resulted in a higher amylose content, probably because of greater recovery of starch from outer parts of the kernel with a higher amylose content.
Original languageEnglish
Pages (from-to)183-191
Number of pages9
JournalJournal of Cereal Science
Volume30
Issue number2
DOIs
Publication statusPublished - 1999
MoE publication typeA1 Journal article-refereed

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Hordeum
Starch
microstructure
Amylose
amylose
chemical composition
barley
starch
Microstructure
Chemical analysis
glucans
Glucans
Ashes
granules
seeds
aleurone layer
Endosperm
starch granules
endosperm
microscopy

Cite this

Andersson, A. ; Andersson, R. ; Autio, Karin ; Åman, Per. / Chemical composition and microstructure of two naked waxy barleys. In: Journal of Cereal Science. 1999 ; Vol. 30, No. 2. pp. 183-191.
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title = "Chemical composition and microstructure of two naked waxy barleys",
abstract = "Two naked waxy barley cultivars, Bz 489-30 and Prowashonupana were analysed in order to study the chemical composition and the microstructure. Prowashonupana contained more protein, fat and ash, and less starch than Bz 489-30. The content of mixed-linked β-glucan was almost three times higher in Prowashonupana (14·9{\%}) than in Bz 489-30 (5·6{\%}), but extractability at 40 °C was much lower. Microscopy studies showed that kernels and endosperm cells of Prowashonupana were irregular, and that cell walls were thicker with a higher content of mixed-linked β-glucan than in Bz 489-30. In both barleys the sub-aleurone layer contained black starch granules, indicating a higher amylose content in this structure compared to the rest of the kernel. Starch was isolated from both barleys using two different procedures and analysed for amylose content. The amylose content was higher, while volume {\%} of A-granules was lower and mean diameter of A-granules was smaller in starch isolated from Prowashonupana than from Bz 489-30. Both composition and yield of starch were however influenced by the isolation procedure used. The procedure which gave higher starch yield resulted in a higher amylose content, probably because of greater recovery of starch from outer parts of the kernel with a higher amylose content.",
author = "A. Andersson and R. Andersson and Karin Autio and Per {\AA}man",
year = "1999",
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pages = "183--191",
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Andersson, A, Andersson, R, Autio, K & Åman, P 1999, 'Chemical composition and microstructure of two naked waxy barleys', Journal of Cereal Science, vol. 30, no. 2, pp. 183-191. https://doi.org/10.1006/jcrs.1999.0267

Chemical composition and microstructure of two naked waxy barleys. / Andersson, A.; Andersson, R.; Autio, Karin; Åman, Per.

In: Journal of Cereal Science, Vol. 30, No. 2, 1999, p. 183-191.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Chemical composition and microstructure of two naked waxy barleys

AU - Andersson, A.

AU - Andersson, R.

AU - Autio, Karin

AU - Åman, Per

PY - 1999

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N2 - Two naked waxy barley cultivars, Bz 489-30 and Prowashonupana were analysed in order to study the chemical composition and the microstructure. Prowashonupana contained more protein, fat and ash, and less starch than Bz 489-30. The content of mixed-linked β-glucan was almost three times higher in Prowashonupana (14·9%) than in Bz 489-30 (5·6%), but extractability at 40 °C was much lower. Microscopy studies showed that kernels and endosperm cells of Prowashonupana were irregular, and that cell walls were thicker with a higher content of mixed-linked β-glucan than in Bz 489-30. In both barleys the sub-aleurone layer contained black starch granules, indicating a higher amylose content in this structure compared to the rest of the kernel. Starch was isolated from both barleys using two different procedures and analysed for amylose content. The amylose content was higher, while volume % of A-granules was lower and mean diameter of A-granules was smaller in starch isolated from Prowashonupana than from Bz 489-30. Both composition and yield of starch were however influenced by the isolation procedure used. The procedure which gave higher starch yield resulted in a higher amylose content, probably because of greater recovery of starch from outer parts of the kernel with a higher amylose content.

AB - Two naked waxy barley cultivars, Bz 489-30 and Prowashonupana were analysed in order to study the chemical composition and the microstructure. Prowashonupana contained more protein, fat and ash, and less starch than Bz 489-30. The content of mixed-linked β-glucan was almost three times higher in Prowashonupana (14·9%) than in Bz 489-30 (5·6%), but extractability at 40 °C was much lower. Microscopy studies showed that kernels and endosperm cells of Prowashonupana were irregular, and that cell walls were thicker with a higher content of mixed-linked β-glucan than in Bz 489-30. In both barleys the sub-aleurone layer contained black starch granules, indicating a higher amylose content in this structure compared to the rest of the kernel. Starch was isolated from both barleys using two different procedures and analysed for amylose content. The amylose content was higher, while volume % of A-granules was lower and mean diameter of A-granules was smaller in starch isolated from Prowashonupana than from Bz 489-30. Both composition and yield of starch were however influenced by the isolation procedure used. The procedure which gave higher starch yield resulted in a higher amylose content, probably because of greater recovery of starch from outer parts of the kernel with a higher amylose content.

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