Abstract
Rhizome tip cuttings of peppermint plant were cultured with water of various pH under various temperatures. (1) The most vigorous growth was observed at pH 7 approximately, when compared at every level temperature tested, and this means that the activities of lipase and amylase were favored most at this pH. (2) Meanwhile, the more vigorous growth was obtained under higher temperatures when compared at every pH grade, because the enzymes could function more actively. (3) The buds were damaged when the acidity is beyond pH 4.5.
