通过气相色谱分析研究了高抗、中抗和敏感马尾松种源在接种松材线虫 (PWN)后所引起的中性萜类 (主要是倍半萜类 )组分含量变化规律以及含量变化与种源抗性间相关性变化规律。结果表明 ,接种PWN使抗性马尾松种源中某些萜类组分如长叶烯等增多 ,而某些组分如反式石竹烯等减少 ;接种PWN使高抗种源中长叶烯与反式石竹烯含量比值先减小后增大 ,且超过接种前的水平 ,但是未改变种源的抗病特征 ;树木生长过程对种源抗性及本研究没有造成影响和干扰。 The changes of the content of neutral terpenoids (mainly sesquiterpenoids) caused by the inoculated pine wood nematode (PWN) were studied by gas chromatography. Variation of the correlation of provenance resistance. The results showed that inoculation with PWN increased some terpenoid components such as longifolene and some components such as trans-caryophyllene in the provenance of P. massoniana, The ratio of trans-Caryophyllene to trans-Caryophyllene decreased first and then increased, and exceeded the level before inoculation, but did not change the disease-resistant characteristics of the provenance. The growth of the tree did not affect or interfere with the resistance of the provenance and the study.