Enzyme-assisted extraction of bioactive compounds from ginger (Zingiber officinale Roscoe)

• Published in: Food chemistry 2013-08, Vol.139 (1-4), p.509-514
• Main Authors: Nagendra chari, K.L., Manasa, D., Srinivas, P., Sowbhagya, H.B.
• Format: Article
• Language: English
• Subjects: 6-Gingerol; alpha-Amylases - chemistry; Antioxidant activity; Aroma and flavouring agent industries; Biological and medical sciences; Catechols - analysis; Catechols - isolation & purification; Cellulase - chemistry; Chemical Fractionation; Enzymes; Fatty Alcohols - analysis; Fatty Alcohols - isolation & purification; Food engineering; Food industries; Fundamental and applied biological sciences. Psychology; General aspects; Ginger; Multienzyme Complexes - chemistry; Oleoresin; Plant Extracts - analysis; Plant Extracts - isolation & purification; Polyphenols; Zingiber officinale - chemistry
• ISSN: 0308-8146; 1873-7072
• DOI: 10.1016/j.foodchem.2013.01.099

► Enzyme pre-treatment of ginger resulted in enhanced extraction of oleoresin and 6-gingerol. ► Oleoresin yield was highest from the extraction of cellulase and α-amylase treated ginger with ethanol. ► 6-Gingerol content was maximal in the acetone extract of ginger treated with α-amylase and viscozyme. ► Cellulase treatment of ginger resulted in improved extraction of polyphenols in the resin. Ginger (Zingiber officinale R.) is a popular spice used in various foods and beverages. 6-Gingerol is the major bioactive constituent responsible for the antiinflammatory, antitumour and antioxidant activities of ginger. The effect of application of α-amylase, viscozyme, cellulase, protease and pectinase enzymes to ginger on the oleoresin yield and 6-gingerol content has been investigated. Pre-treatment of ginger with α-amylase or viscozyme followed by extraction with acetone afforded higher yield of oleoresin (20%±0.5) and gingerol (12.2%±0.4) compared to control (15%±0.6 oleoresin, 6.4%±0.4 gingerol). Extraction of ginger pre-treated with enzymes followed by extraction with ethanol provided higher yield of gingerol (6.2–6.3%) than the control (5.5%) with comparable yields of the oleoresin (31–32%). Also, ethanol extract of cellulase pre-treated ginger had the maximum polyphenol content (37.5mg/g). Apart from 6-gingerol, 6-paradol along with 6- and 8-methyl shogaols were the other important bio-active constituents in the oleoresin from cellulase-treated ginger.