垂叶榕叶片表面蜡质化学组分及蓟马锉吸胁迫对其含量的影响

为明确垂叶榕(Ficus benjamina)叶片表面蜡质的化学组分和蓟马(Thrips spp.)锉吸胁迫对蜡质含量的影响，采用气相色谱-质谱联用仪(GC-MS)对不同危害等级蓟马锉吸叶片的表面蜡质化学组分及含量进行了检测和比较分析。结果表明，垂叶榕叶片的表面蜡质中含有32种化合物，包含有9种酸、8种醇、5种酯、5种酮和5种烃。不同危害等级叶片的表面蜡质总量、已分离化合物的总离子峰面积、各类化合物的相对含量、各类化合物及其主要组分的离子峰面积均不同。垂叶榕叶片的表面蜡质的化学组分和含量可直接或间接反映叶片受蓟马锉吸危害的程度。这说明叶片表面蜡质的化学组分及含量在垂叶榕与蓟马的互作和协同进化中扮演着重要角色。

Chemical Constitution of Surface Wax and Effect of Rasping-sucking by Thrips on Wax Contents in Ficus benjamina Leaves

In order to understand the chemical constitution of surface wax in leaves of Ficus benjamina Linn. and the changes in wax contents rasp-sucked by thrips, the chemical constitution of surface wax and its contents in leaves at different damage grades by thrips were determined by gas chromatography-mass spectrometry (GCMS). The results showed that there were 32 compounds in surface wax of F. benjamina leaves, including 9 acids, 8 ahcohols, 5 esters, 5 ketones and 5 hydrocarbons. The changes in total amount of surface wax, the total ion peak area of compounds, the relative content of each compounds, the ion peak area of each compounds and its main component in different grade leaves damaged by thrips were different. The chemical constitution and contents of surface wax could reflect the damage degree by thrips either directly or indirectly. It was suggested that the chemical constitution of surface wax and its contents had played a major role in interaction and co-evolution between F. benjamina and thrips.