摘要
以分光光度法研究了云南5个烟区津巴布韦烤烟品种KRK26成熟中部叶片类胡萝卜素在三段式烘烤中的相对降解速率、总降解量、总降解率和烘烤后残余量及其与叶绿素降解的相关性。结果表明:不同烟区KRK26类胡萝卜素在烘烤中相对降解速率间的差异和在烘烤不同阶段相对降解速率间的差异均未达到显著水平。不同烟区KRK26类胡萝卜素的相对降解速率一般小于其叶绿素,并且与各自叶绿素相对降解速率的相关程度不一致。保山和文山烟区KRK26类胡萝卜素的降解速率最高峰出现在变黄前期,景谷和临沧的在变黄后期,玉溪的在定色前期。在整个烘烤中,不同烟区KRK26类胡萝卜素的总降解量、总降解率和残余量不同,并且,总降解量间的差异达到显著水平,总降解率均小于其叶绿素,残余量均大于其叶绿素,类胡萝卜素和叶绿素的残余量间成负相关。所以,云南不同烟区KRK26叶片类胡萝卜素降解的产香潜力不同。本研究结果可为云南烟区KRK26香气品质的评价与调控、适宜种植区域的选择和烘烤工艺的优化提供参考。
The relative degradation rates,total degradation quantities,total degradation percentages and residual volumes of the carotinoid of the mature middle leaves of the Zimbabwe tobacco variety KRK26 from the five tobacco-growing areas in Yunnan Province during three phase flue-curing and their correlations with the chlorophyll degradation were studied by using spectrophotometry.The results indicated that： the difference of the degradation rates of the carotinoid of the KRK26 from different tobacco-growing areas during flue-curing and that of the carotinoid at different flue-curing stages did not reach the significant level.The degradation rates of the carotinoid of the KRK26 from different areas were generally lower than and differentially correlated to that of their chlorophylls.The highest degradation rate peaks of the carotinoid of the KRK26 from Baoshan and Wenshan tobacco-growing areas all appeared at the early period of the yellowing,those from Jinggu and Lincang at the later period of the yellowing and that from Yuxi at the early period of color-fixing.During the whole flue-curing,the total degradation quantities,total degradation percentages and residual volumes of the carotinoid of the KRK26 from different areas were different.Moreover,the difference among the total degradation quantities reached the significant level,the total degradation percentages were lower than that of their chlorophylls,the residual volumes were higher than that of the chlorophylls and the residual volumes of the carotinoids were negatively related to that of the chlorophylls.Thus,the aroma-producing potentials of the KRK26 from the differenttobacco-growing areas in Yunnan Province with respect to the carotinoid degradation were different.This research could provide a reference for the assessment and control of the aroma quality,the choice of the planting area and the optimization of the flue-curing technology of the KRK26 in Yunnan Province.
出处
《西南农业学报》
CSCD
北大核心
2011年第2期496-503,共8页
Southwest China Journal of Agricultural Sciences
基金
云南省烟草农业科学院资助项目"云烟区烟叶与津巴布韦烟叶比较"
关键词
云南烟区
KRK26
烘烤
类胡萝卜素
降解
Yunnan tobacco-growing area
KRK26
Flue-curing
Carotenoid
Degradation
