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Studies on the biologically active substances in tea infusion using microorganisms



Studies on the biologically active substances in tea infusion using microorganisms



Scientific Reports of the Faculty of Agriculture Meijo University (37): 147-156, March



Antimutagenic and antimicrobial activities of tea extract were examined. Antimutagenicity was determined by a modified Ames method using Trp-P-1 as indirect mutagen and 1-NP as direct mutagen. In Ames test, Salmonella typhimurium TA 98 was used. Antimicrobial activity was examined by measuring Minimum Inhibitory Concentration (MIC), using 9 strains of food-borne diseases. One of the strongest antimutagenicity was shown by (-)- epigallocatechin gallate (EGCG), and the contribution to the inhibitory activity against Trp-P-1 by catechin compounds was 64% to 99.9%. From these results the other compounds were tested for antimutagenicity. Volatile compounds such as geraniol, beta-ionone, nerolidol, cis-jasmone and linalool oxide were found to exhibit antimutagenicity. As for antimicrobial activity, EGCG exhibited strong effect. Nerolidol, geraniol and nerol also exhibited strong effect on the bacteria.

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Accession: 011414497

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