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Title: Comparison of gamma-aminobutyric acid production in Thai rice grains
Authors: Panatda Jannoey
Hataichanoke Niamsup
Saisamorn Lumyong
Toshisada Suzuki
Takeshi Katayama
Griangsak Chairote
Keywords: Biochemistry, Genetics and Molecular Biology
Immunology and Microbiology
Issue Date: 1-Feb-2010
Abstract: Gamma-aminobutyric acid (GABA) has many pharmacological functions including being a major inhibitory neurotransmitter. Two comparative methods for GABA production in rice grains as main food source in Thailand were investigated in this study. Fermentation and germination method were separately carried out using seven selected local grain cultivars in northern Thailand. Red yeast rice, obtained from the fermentation method, gave the higher GABA concentration than the germinated rice produced from the germination method in most rice cultivars. The highest GABA concentration was 28.37 mg/g at 3 weeks fermentation time of glutinous rice, O. sativa L. cv. Sanpatong 1 cultivars, while germinated rice from glutinous rice; O. sativa L. cv. Korkor6 (RD6) cultivars contained the highest GABA concentration of 3.86 mg/g. These results provide information for the basis of an appropriate method for GABA production. The fermentation produced higher GABA concentration but required longer production period and red yeast rice was obtained as product. On the other hand, the germination method yielded rice grains with lower GABA but in more suitable form for consumption. Both methods are considered to be economical and efficient methods to increase GABA in rice grains, providing alternative products with higher nutritional values. © 2009 Springer Science+Business Media B.V.
ISSN: 09593993
Appears in Collections:CMUL: Journal Articles

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