Cronartium pini causes economic losses especially on Scots pine in northern Europe. Scots pine reacts to rust infection by resin flow. The chemicals enriched in wood after Cronartium infection have not been investigated before. We investigated resin acids and mono- and sesquiterpenes produced in Cronartium-infected wood. Cronartium-infected wood was extracted with acetone, and the extractives were analysed by GC-mass spectrometry (GC-MS) and compared to those from control wood. Among resin acids, abietic acid, levopimaric acid, palustric acid, dehydroabietic acid and neoabietic acid were the richest (32–68 mg/g) in Cronartium-infected wood. Among monoterpenes, concentration of α-pinene was the highest (49 mg/g) in Cronartium-infected wood. Concentrations of all monoterpenes and resin acids and most sesquiterpenes were significantly higher (1.3- to 108-fold) in Cronartium-infected wood compared to control wood. In the control wood, the extractive content was greater (1.1- to 14-fold) than in the literature suggesting that the chemical processes were strongly affected by the rust. The results suggest that terpenes and resin acids are produced by the host to protect it from Cronartium rust.

中文翻译：

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锈菌 Cronartium pini 定植的苏格兰松茎病变中萜烯和树脂酸含量

Cronartium pini造成经济损失，特别是在北欧的苏格兰松树上。苏格兰松对树脂流动引起的锈病感染作出反应。Cronartium感染后木材中富含的化学物质以前没有被调查过。我们研究了在受Cronartium感染的木材中产生的树脂酸和单萜和倍半萜。用丙酮提取Cronartium感染的木材，并通过 GC-质谱法 (GC-MS) 分析提取物，并与对照木材的提取物进行比较。在树脂酸中，松香酸、左旋海松酸、长叶松酸、脱氢松香酸和新松香酸在Cronartium感染的木材中含量最高（32-68 mg/g）。在单萜中，α-蒎烯的浓度最高 (49 mg/g)Cronartium感染的木材。与对照木材相比，受Cronartium感染的木材中所有单萜和树脂酸以及大多数倍半萜的浓度显着更高（1.3 至 108 倍）。在对照木材中，提取物含量高于文献中的含量（1.1 到 14 倍），表明化学过程受到锈蚀的强烈影响。结果表明，宿主产生萜烯和树脂酸以保护其免受Cronartium锈病。