不同季节黑杨萎蔫叶片挥发物的化学成分分析

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

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、4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.

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.