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《Southwest China Journal of Agricultural Sciences》 2016-02
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Physiological and Biochemical Indexes of Tobacco Leaves with Different Maturity in Two Ecological Regions

LIAO Kong-feng;XU Xing-yang;DAI Jin-ran;WU Yong-ming;CHEN Sui-yun;DUAN Yong-ming;QIN Chun-li;School of Life Science,Yunnan University;Technical Centre of Yunnan Tobacco Company Kunming Branch;Xundian Subsidiary Company of Yunnan Tobacco Company Kunming Branch;  
To explore the changes of the physiological maturity of flue-cured tobacco of Honghuadajinyuan leaves from various parts can provide the basis for judging the best maturity level,guiding the scientific harvest of tobacco leaves in the field and further improving the quality of tobacco leaves. In the present paper a comparative study of the two ecological zones in Kunming was carried out. The results showed that:from the view of different maturity levels,with the rise of tobacco mature level,nitrate reductase activity,pigment content and total nitrogen content were decreased,but amylase activity was increased in Xundian and Shilin areas. These indicators can be used as the main basis for determining the leave maturity in the two areas. In different parts of tobacco leaves from two areas,nitrate reductase activity showed the highest content in middle part of tobacco,but the values of lower part and upper part of tobacco leaves were very close. The pigment content of lower part of tobacco leaves was the highest,and the middle part was slightly higher than the upper parts,and the change of pigment content was stable. The changes of amylase activity content and total nitrogen content were different in the two places. Comprehensive analysis showed that the physiological state of the middle part of tobacco leaves was the best. Optimum harvest maturity level should be M3 and M4,followed by M2 and M5,and the worst was M1.
【Fund】: 中国烟草总公司云南省公司资助项目(2013YN17)
【CateGory Index】: S572
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