中国烟草学报2012，Vol.18Issue(5)：9-15,7.DOI:10.3969/j.issn.1004-5708.2012.05.002
不同产地和品种白肋烟烟草特有亚硝胺与前体物关系
The relationships between TSNAs and their precursors in different burley tobacco varieties from different regions
摘要
Abstract
Thirty-three air-cured burley tobacco samples produced in 4 main producing areas of China as well as USA and Malawi were collected and contents of tobacco specific nitrosamine, alkaloids, nitrate and nitrite were analyzed to investigate relationship between TSNAs and their precursors. Results showed that TSNAs contents in tobacco from Dazhou and Binchuan were at low levels compared to foreign samples. Contents of NNN and total TSNAs varied greatly among samples from different areas, while differences in NNK, NAT and NAB contents were relatively small. Conversion of nicotine leading to increase of nomicotine was the main cause for abnormal increase of NNN and total TSNAs in tobaccos from certain areas, and with the increase of total TSNAs, the proportion of NNN increased proportionally. The contents of total TSNAs and NNN had significantly positive correlations with percent nicotine conversion and nornicotine content. Contents of NNK, NAT and NAB correlated significantly with nitrate contents, especially among samples within same producing area, the correlation coefficient between NNK content and nitrate was much elevated. Nicotine conversion and nitrate contents were two main factors contributing to the increase and accumulation of TSNAs. Comparison a-mong different varieties revealed that Eyanl, Eyan3 had higher nicotine conversion levels and was the main cause for their higher TSNAs contents. The purification and improvement of current cultivars for low nicotine conversion was an essential means to reduce TSNAs formation. Lowering of nitrate accumulation to minimize the substrate of nitrate reduction was another important approach for TSNAs reduction.关键词
白肋烟/烟草特有亚硝胺/生物碱/烟碱转化/硝酸盐Key words
burley/ tobacco specific nitrosamine/ alkaloid/ nicotine conversion/ nitrate分类
轻工纺织引用本文复制引用
史宏志,徐发华,杨兴有,王瑞云,褚瑞,毕庆文,孙军伟,邓大庆,赵田..不同产地和品种白肋烟烟草特有亚硝胺与前体物关系[J].中国烟草学报,2012,18(5):9-15,7.基金项目
云南省烟草公司科技项目(2010YN36),四川省烟草公司科技项目(201101011) （2010YN36）
