Study on the Activity of Amylase & Starch Phosphorylase and Curing Temperature & Humidity in Tobacco Leaves

doi:10.3321/j.issn:1000-7091.2005.04.005

Abstract

Abstract: The activity dynamics of starch degradation enzyme in tobacco leaves were studied in order to provide theoretical warrant of scientific curing during flue-curing.The effects of curing environment on the activity of amylase and starch phosphorylase and the changes of the activity of amylase and starch phosphorylase in tobacco leaves during flue-curing were studied by using the flue-cured tobacco cv.HD and K326 as experimental material.The results indicated that there were two peaks of amylase activity,at the 36th and the 72nd hours during curing,respectively,relatively low at the end of curing.The activity of starch phosphorylase was relatively higher in fresh leaves.With the proceeding of curing,the activity of starch phosphorylase reached its first peak at the 24th hour,followed by a valley at the 48th hour,and then the second peak at the 72nd hour.During the whole process of flue-curing,the activity of amylase and starch phosphorylase was relatively high and starch degradation was quick in tobacco leaves of lower temperature and humidity yellowing,slow heating speed fixing-color.

Key words: Flue-cured tobacco, Amylase, Starch phosphorylase, Temperature and humidity

CLC Number:

S572.01

GONG Shun-yu, YANG Huan-wen, WANG Huai-zhu, MAO Jian-shu. Study on the Activity of Amylase & Starch Phosphorylase and Curing Temperature & Humidity in Tobacco Leaves[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2005, 20(4): 17-20. doi: 10.3321/j.issn:1000-7091.2005.04.005.

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