Abstract

Bioactivity evaluation of trees species is an important step to get high economic value from Kerangas forest. Screening of plants that had antidiabetic activities was conducted by ethnobotanical survey. Antidiabetic evaluation of plant extracts were performed by α glukosidase inhibitor. Result showed there are three plant exracts from Kerangas forest had anti diabetic activity. The methanol extract of dried bark of Shorea balangeran, Cratoxylum arborescens and Baeckea frutescens inhibited 50% of α glukosidase activity at concentration: 0,816 ppm, 5,234 ppm, 21,796 ppm, respectively, while the IC50 of glukobay: 0,167 ppm. It can be conclude that methanol extract of Kerangas plant species had potential activities as antidiabetic.