打顶时期对白肋烟烟叶腺毛分泌物的影响

Effects of Topping Time on Glandular Trichome Exudates of Burley Leaf

应用GC/MS分析了不同打顶时期对白肋烟烟叶表皮腺毛分泌物种类及含量的影响。结果表明,白肋烟烟叶腺毛分泌物以烟碱为主,不同打顶处理的烟叶表皮腺毛分泌物种类和含量存在差异,在上、中、下3个部位烟叶中均能分离出烟碱、茄酮和邻二甲苯,在上部叶中分离鉴定出四十四烷,中部叶中分离鉴定出二十九烷,下部叶中分离鉴定出三十烷和三十六烷。盛花和初花打顶的上部叶腺毛分泌物烟碱含量分别为89.49%和61.81%、中部叶烟碱含量为85.72%和70.66%、下部叶烟碱含量68.35%和69.17%。

The glandular trichome exudates on leaf surface of burley tobacco topped at different time were analyzed with GC/MS. The results showed that： the major component in the exudate was nicotine, and the composition of exudate of tobacco topped at early-flowering stage was different from that topped at full-blooming stage. Nicotine, solanone and o-xylene were detected in exudates of leaves from all stalk positions, tetratetracontane was detectable in upper leaves, nonacosane in cutter leaves, while triacontane and n-Hexatriacontancd in lower leaves. For early-flowering stage topped tobacco, the nicotine contents in the exudates of upper, cutter and lower leaves were 89. 49%, 85. 72% and 68. 35%, respectively; for full-blooming stage topped tobacco, which were 61.81% , 70.66% and 69.17% , respectively