Inhibition of β-Glucosidase and Esterase by Tannins from Betula, Salix, and Pinus Species
- Cite this article as:
- Juntheikki, MR. & Julkunen-Tiitto, R. J Chem Ecol (2000) 26: 1151. doi:10.1023/A:1005427809812
The reaction of tannin fractions isolated from the bark of Betula, Salix, and Pinus species with two enzymes, β-glucosidase and esterase, was investigated. The influence of precipitation to the hydrolytic capacity of β-glucosidase also was studied. All tannins studied precipitated β-glucosidase and esterase, and moderate differences in the precipitating capacities of the tannins were observed. Interestingly, complex formation between β-glucosidase and tannin did not markedly affect the activity of the enzyme. Therefore, complex formation during the insect/herbivore feeding does not necessarily change the defense activity of phenolic glycosides or decrease activity of digestive enzymes.