不同季节黑杨萎蔫叶片挥发物的化学成分分析

采用水蒸气蒸馏法和气相色谱-质谱联用技术,分析黑杨不同季节的叶片,即嫩叶、成熟叶和衰老叶萎蔫后释放的气味物质成分.结果表明,嫩叶挥发物主要成分为顺-3-己烯醇、-甲基-1-戊醇和邻羟基苯甲醛,其相对含量分别为44.81%、21.85%和15.19%;成熟叶挥发物主要组分也是顺-3-己烯醇,相对含量28.71%,其次为邻羟基苯甲醛,相对含量10.35%.邻羟基苯甲醛为衰老叶挥发物的主要组分为,其相对含量为28.81%,其次是苯甲醇,相对含量15.06%;随着叶龄增长,挥发物中顺-3-己烯醇含量显著减少,而具有芳香性化合物种类及其含量显著增加.

Chemical components of volatiles from withered black poplar leaves with different physiological age

By the methods of steam distillation and GC-MS,this paper analyzed the chemical components of the volatiles from withered black poplar leaves.The main components of the volatiles from young leaves were(Z)-3-hexenol(44.81%),4-methyl-1-pentanol(21.85%)and 2-hydroxy-benzaldehyde(15.19%),those from matured leaves were(Z)-3-hexenol(28.71%)and 2-hydroxy-benzaldehyde(10.35%),while in the volatiles from senescent leaves,the main components were 2-hydroxy-benzaldehyde(28.81%)and benzyl alcohol(15.06%).The(Z)-3-hexenol content in the volatiles was evidently decreased with increasing leaf age,while the species and contents of aromatic compounds were in adverse.