Preliminary Experiments on Enzymic Degradation of Starch in Henan Flue-cured Tobacco, B2F, C3F and X2L

In order to reduce the starch content of green leaf, Henan flue-cured tobacco, B2F, C3F and X2L, were treated with amylase and glucoamylase.The results showed that the starch content in the treated tobacco was decreased.The preferable treatment conditions were as follows:1) for B2F, 40 units/g of mixture of amylase and glucoamylase (1:1, w/w), temperature 45℃ and relative humidity 70% for 2 hours;2) for C3F, 20 units/g of amylase, temperature 25℃ and relative humidity 50% for 4 hours;and 3) for X2L, 80 units/g of mixture of amylase and glucoamylase (1:5, w/w), temperature 35℃ and relative humidity 60% for 2 hours.