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Henry, R.J., Johnston, R.P. 1991. Influence of genotype and environmental interaction on malting quality. In: Munck, L. (ed.), Barley Genetics VI. Proc.: Sixth International barley genetics Symposium. July, 22–27, 1991. Helsingborg, Sweden, pp. 478

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modification determination. Symposium on the Relationship between Malt and Beer, Helsinki, pp. 224–234. Ellis, R.P., Camm, J.-P., Morrison, W.R. 1992. A rapid test for malting quality in barley. HGCA Project report No. 63

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Chen, J.X., Dai, F., Wei, K., Zhang, G.P. 2006. The effects of timing of nitrogen fertilizer application on some grain and malt qualities of barley. J. Zhejiang Univ. Sci. 7 :79–84. Zhang G

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Baxter, E.D., Wainwright, T. 1979. Hordein and malting quality. J. Am. Soc. Brew. Chem. 37 :8–12. Wainwright T. Hordein and malting

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. Nitrogen effects on yield and malting quality of barley genotypes under no-till. Agron. J. 83 :341–346. Ullrich S.E. Nitrogen effects on yield and malting quality of barley genotypes

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Cereal Research Communications
Authors: Alojzije Lalic, Josip Kovacevic, Gordana Šimić, Georg Drezner, and Vlado Guberac

. Technologie der Malzbereitung 1976 Passarella V.— Savin R.— Slafer G.: 2002 Grain weight and malting quality in barley as affected by brief

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and hordein fraction content in barley seeds as affected by sowing date and their relations to malting quality . J. Zhejiang Univ. , 6 , 1069 – 1075 . Rimsten

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.E. Barley 1985 Clancy, J.A., Tillman, B.A., Pan, W.L. and Ullrich, S.E. (1991). Nitrogen effects on yield and malting quality

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Növénytermelés
Authors: Nikoletta Tóth, István Murányi, and Zoltán Bódi

. 16 Chen , J. X. – Dai, F. – Wei, K. – Zhang G P. : 2006 . The effects of timing of nitrogen fertilizer aplication on some grain and malt qualities of barley . J. Zheijang Univ. Sci. 7 : 79 – 84

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Treatment of barley grain with gibberellic acid (GA3) during malting promotes abnormal proteolysis and rapid rootlets growth affecting malt quality. This study investigated the potential of ethylene treatment as an alternative by comparing the amylase activity, total starch and total reducing sugars of germinating ‘Puma’ barley seeds treated with ethylene, 1-methylcyclopropane (1-MCP), GA3, daminozide (B-nine), GA3 + 1-MCP, ethylene + B-nine and the control after 24, 48 and 72 h from soaking. Ethylene had no effect on amylase activity. B-nine reduced amylase activity by 16 and 9.6% compared to the control after 48 and 72 h, respectively. The amylase activity of ethylene + B-nine treated seeds was higher (13.3 and 4%) than B-nine treated seeds after 48 and 72 h. This suggest that endogenous GA is important for normal amylase activity and, ethylene stimulates amylase activity where GA synthesis is inhibited. Ethylene and GA3 treatments reduced starch (83.3 mg g−1 and 76.7 mg g−1, respectively) and increased reducing sugars (16.0 and 17.1 µg ml−1, respectively) compared to the control (115.3 mg g−1 starch and 12.1 µg ml−1 reducing sugars) after 72 h. It was concluded that, ethylene may replace GA3 treatment without interfering with starch changing processes during barley malting.

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