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The amino acid composition of barley grain protein during development and germination

Published online by Cambridge University Press:  27 March 2009

D. B. Smith
D. B. Smith
Affiliation:
The Plant Breeding InstituteTrumpington, Cambridge
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Summary

The amino acid composition of barley grain was studied during the maturation of the grain and during germination of the mature grain. Samples of the variety Proctor, grown at two nitrogen levels in each of the years 1969 and 1970, were analysed together with one sample of Sultan grown in 1970. It was found that during maturation the proportions of glutamic acid and proline increased and that the levels of these amino acids were highest in those samples with the highest total protein content. During ripening the proportions of lysine, alanine, aspartic acid, threonine and glycine decreased. On germination the proportions of glutamic acid and proline rapidly decreased whilst aspartic acid, lysine, alanine and glycine increased.

The nutritive value of ripe barley grain is limited by its low lysine content. Whilst the germination process increases the level of lysine it is suggested that this does not increase the nutritional value of the grain due to the low level of cystine in the germinated grain.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 78 , Issue 2 , April 1972 , pp. 265 - 273
Copyright
Copyright © Cambridge University Press 1972

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References

REFERENCES

Bishop, L. R. (1929). Third report on barley proteins. The changes undergone by the nitrogenous constituents of barley during malting: I. J. Inst. Brew. 35, 323.CrossRefGoogle Scholar
Breyhan, T., Heilinger, F. & Fischnich, O. (1959). Über das Vorkommen und die Bedeutung dea Prolins in der Kartoffel. Landw. Forsch. 12, 293.Google Scholar
Brown, C. M., Weber, E. J. & Wilson, C. M. (1970). Lipid and amino acid composition of developing oats (Avena satjva L. cultivar ‘Brave’). Crop. Sci. 10, 488.Google Scholar
Dustin, J. P., Czajkowska, C., Moore, S. & Bigwood, E. J. (1953). A study of the chromatographic determination of amino acids in the presence of large amounts of carbohydrate. Analytica chim. Ada 9, 256.CrossRefGoogle Scholar
Folkes, B. F. & Yemm, E. W. (1956). The amino acid content of the proteins of barley grains. Biochem. J. 62, 4.Google Scholar
Folkes, B. F. & Yemm, E. W. (1958). The respiration of barley plants. X. Respiration and the metabolism of amino acids and proteins in germinating grain. New Phytol. 57, 106.Google Scholar
Jennings, A. C. & Morton, R. K. (1963). Amino acids and protein synthesis in developing wheat endosperm. Aust. J. biol. Sci. 16, 384.Google Scholar
Jones, M. & Pierce, J. S. (1967). The role of proline in the amino acid metabolism of germinating barley. J. Inst. Brew. 73, 577.CrossRefGoogle Scholar
Mitcheson, R. C. & Stowell, K. C. (1970). Application of new analytical techniques to routine malting analysis. 1. Determination of barley and malt nitrogen content using an autoanalyser technique. J. Inst. Brew. 76, 335.Google Scholar
Osbourne, B. J. (1895). Proteids of barley. J. Am. chem. Soc. 17, 539.Google Scholar
Pomeranz, Y., Finney, K. F. & Hoseney, R. C. (1966). Amino acid composition of maturing wheat. J. Sci. Fd Agric. 17, 485.Google Scholar
Preston-Smith, , Ambrose, M. E. Jr & Knobl, G. M. Jr (1965). Possible interference of fats, carbohydrates and salts in amino acid determinations in fish meals, fish protein concentrates and mixed animal feeds. J. agric. Fd Chem. 13, 266.CrossRefGoogle Scholar
Rose, W. C. (1938). The nutritive significance of the amino acids. Physiol. Rev. 18, 109.Google Scholar
Sedova, E. V. & Pleshkov, B. P. (1969). Changes in fractional and amino acid composition of oat grain protein in the course of maturation. Chem. Abstr. 70, 26366.Google Scholar
Spackmann, D. H., Stein, W. H. & Moore, S. (1958). Automatic recording apparatus for use in the ohromatography of amino acids. Analyt. Chem. 30, 1190.CrossRefGoogle Scholar
Wiggans, S. C. & Frey, K. J. (1958). The ratio of alcohol-soluble to total nitrogen in developing oat seeds. Cereal Chem. 35, 325.Google Scholar
Whitmore, E. T. (1969). Automatic determination of nitrogen in plant material of widely varying protein content. Rep. PI. Breed. Inst., 151.Google Scholar
Yemm, E. W. (1954). Cellular oxidations and the synthesis of amino acids and amides in plants. Colston Pap. 7, 51.Google Scholar