Dewey F M, Wong Y Li, Seery R, Hollins T W, Gurr S J
1 Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, UK.
New Phytol. 1999 Dec;144(3):489-497. doi: 10.1046/j.1469-8137.1999.00542.x.
In studies with a laboratory isolate of the fungal pathogen Stagonospora (Septoria) nodorum three different isolates of bacteria were closely associated with the fungus. Bacteria were also closely associated with fresh isolates of S. nodorum obtained from artificially and naturally infected field material. Although a range of bacteria was isolated, only one type of bacterium was found to be associated with each isolate of S. nodorum. In co-inoculation studies with pycnidiospores of the fungus on detached leaves, some of the bacterial isolates significantly increased the pathogenicity of the fungus, particularly Xanthomonas maltophilia, Sphingobacterium multivorum, Enterobacter agglomerans and Erwinia amylovora. Evidence is presented indicating that one of the ways that the 'helper bacteria' may assist in the establishment of infections is by the production of lipases that were not detected in germinating fungal spores.
在对真菌病原体小麦壳针孢（颖枯壳针孢）的一个实验室分离株进行的研究中，三种不同的细菌分离株与该真菌密切相关。细菌也与从人工和自然感染的田间材料中获得的小麦壳针孢新鲜分离株密切相关。虽然分离出了一系列细菌，但发现每种小麦壳针孢分离株仅与一种类型的细菌相关。在用该真菌的分生孢子对离体叶片进行的共接种研究中，一些细菌分离株显著增加了真菌的致病性，尤其是嗜麦芽窄食单胞菌、多食鞘氨醇杆菌、成团肠杆菌和梨火疫欧文氏菌。有证据表明，“辅助细菌”协助建立感染的一种方式是产生在萌发的真菌孢子中未检测到的脂肪酶。
