Comparative study on germination characteristics for different varieties of unpolished coix seed and optimization of germinated technological conditions

Authors

DANG Juan, School of Liquor and Food Engineering, Guizhou University, Guiyang, Guizhou 550025, China
QIN Likang, School of Liquor and Food Engineering, Guizhou University, Guiyang, Guizhou 550025, China
YANG Xianlong, Xinlong Food Development Company Ltd., Anshun, Guizhou 561000, China
JIN Yi, School of Liquor and Food Engineering, Guizhou University, Guiyang, Guizhou 550025, China

Abstract

This comparative study to analyze the changes in physiological and biochemical in the same condition by unpolished coix seed of 5 varieties that have been produced in Guizhou or Laos, selecting out optimal germination of varieties, then optimizing the germination rate and germination by using γ-amino butyric acid(GABA) as evaluation index, using single factor experiment and orthogonal design methods, tracing its main nutrients and functional components dynamically. The results showed that the sprouts of GZ-1 from Guizhou had the highest germination rate, free amino acids and γ-amino butyric acid (GABA) levels among the five varieties. Based on the sprouting rate and GABA level, an optimal germination condition for variety GZ-1 was developed by using a single factor test followed by an orthogonal experiment design. Under the optimal condition of temperature 28 ℃, relative humidity 90%, and germinating time 96 h, Germination rate of 89%, the level of GABA increased to 78.18 mg/100 g. During germination, protein, starch and polysaccharides in the sprouts decreased while reducing sugars, free amino acids, GABA, and vitamin C, B1 and B2 increased gradually. However, the change of lipids level in sprouts was not significant. With higher level of bioavailable essential nutrients, the germinated unpolished coix seeds could be considered as a health promoting food material.

Publication Date

10-28-2015

First Page

250

Last Page

255

DOI

10.13652/j.issn.1003-5788.2015.05.063

Recommended Citation

Juan, DANG; Likang, QIN; Xianlong, YANG; and Yi, JIN (2015) "Comparative study on germination characteristics for different varieties of unpolished coix seed and optimization of germinated technological conditions," Food and Machinery: Vol. 31: Iss. 5, Article 63.
DOI: 10.13652/j.issn.1003-5788.2015.05.063
Available at: https://www.ifoodmm.cn/journal/vol31/iss5/63

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