苯甲酸在松材线虫病中的作用  

Effects of Benzoic Acid on Pine Wilt Disease Caused by Bursaphelenchus xylophilus

作　　者：欧阳革成[1] 张润杰[1] 

机构地区：[1]中山大学昆虫学研究所生物防治国家重点实验室

出　　处：《林业科学》2007年第2期73-76,共4页Scientia Silvae Sinicae

基　　金：广东省自然科学基金(021676)

摘　　要：在室内条件下,初步研究苯甲酸对松树和松材线虫病的作用。用不同浓度的苯甲酸溶液分别处理松枝,显示低浓度苯甲酸溶液能显著延长松枝的存活期,高浓度苯甲酸溶液处理的松枝针叶出现褐变现象,但对松枝的存活期没有影响,其症状与松材线虫病不同。分别用1.0mmol.L-1的苯甲酸溶液和自来水培养接种松材线虫的松枝,在用苯甲酸溶液处理的接种松枝中,虽然松材线虫仍能大量增殖,但与用自来水培养的接种松枝相比,其蒸腾强度显著增强,失水萎蔫程度显著降低,存活期显著延长,这说明苯甲酸在松材线虫病树中可能起着抑制与病害相关的致病菌或提高松树抗病能力的作用。A primary study on effects of benzoic acid （BA） on pine wilt disease caused by pine wood nematode （Bursaphelenchus xylophilus, PWN） was carried out in the laboratory. Twigs of Pinus massoniana were cultured in different concentration of BA solution. It is showed that lower concentration of BA solution extended survival time of twigs significantly. Although brown stain appeared on some leaves of twigs cultured in higher concentration, these twigs survived as long as the control. Symptom caused by BA was different from that of pine wilt disease. Pine twigs inoculated with PWN were cultured in 1.0 mmol · L^- 1 BA solution and tap water, respectively. The results showed that beth transpiration intensity and survival time of twigs cultured in BA solution were significantly more than those of twigs cultured in tap water, and development of wilt of these twigs was significantly slower, although PWN in twigs cultured in BA solution increased as normally as nematodes in twigs cultured in tap water. It was suggested that BA in diseased trees had inhibitive effects on this disease by inhibiting pathogenic microbes which was involving in this disease or improving vitality and anti-disease ability of pine tree.

关 键 词：苯甲酸 松材线虫 致萎毒素 植物病害防治 

分 类 号：S763.1[农业科学—森林保护学]