Phytoalexins from Pinus strobus bark infected with pinewood nematode, Bursaphelenchus xylophilus
Phytoalexins from Pinus strobus bark infected with pinewood nematode, Bursaphelenchus xylophilus
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DOI：
10.1016/s0031-9422(00)00514-8
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发表时间：
2001-05-01
期刊：
影响因子：
3.8
通讯作者：
Nakashima, T
中科院分区：
文献类型：
--
作者：
Hanawa, F;Yamada, T;Nakashima, T
从感染松材线虫病的松树皮中分离到一种芪类化合物3-O-甲基二氢松素和一种黄烷酮（2S）-松属素，它们是诱导产生的抗真菌化合物的活性成分。化合物的结构经波谱分析确定。对光谱分析的仔细研究导致了前一种化合物的C-13 NMR和H-1 NMR化学位移的完全归属，并确定了来自P. strobus的后一种化合物的立体化学为2S。此外，研究了所鉴定化合物的分布和时程积累。前一种化合物被证明是杀线虫的，并且该化合物在接种的树枝中的浓度足以在接种后一周内杀灭松材线虫。(C)2001爱思唯尔科技有限公司版权所有。
From the bark of Pinus strobus infected with pinewood nematode, Bursaphelenchus xylophilus, a stilbenoid 3-O-methyldihydropinosylvin and a flavanone (2S)-pinocembrin were isolated as active principles of inducibly produced antifungal compounds. The structures of the compounds were determined on the basis of spectroscopic analyses. Close investigations of spectroscopic analyses led to the complete assignment of C-13 NMR and H-1 NMR chemical shifts for the former compound and to the determination of the stereochemistry of the latter compound from P. strobus to be 2S. Furthermore, the distribution and time course accumulation of the identified compounds were investigated. The former compound was demonstrated to be nematocidal and the concentrations of the compound in the inoculated branches were sufficient enough to inactivate the pinewood nematode within one week after inoculation. (C) 2001 Elsevier Science Ltd. All rights reserved.