Fisher P J
Department of Biological Sciences, Hatherly Laboratories, University of Exeter, Exeter EX4 4PS, UK.
New Phytol. 1996 Jan;132(1):119-122. doi: 10.1111/j.1469-8137.1996.tb04516.x.
Pteridium aquilinum (L.) Kuhn was sampled for colonization by Stagonospora pteridiicola in Great Britain, Hungary and Australia. British samples gave the highest incidence of 68% during September and 12% at the beginning of the growing season. Hungarian samples showed a similar frequency. The fungus was not found in Australian bracken. Five field-collected fern species other than bracken did not contain the fungus in May when bracken already had a colonisation frequency of 12% in the pinnules. Sampling after the bracken had died in November demonstrated that the fungus had continued growth as a saprobe. Glasshouse-grown bracken sprayed with a spore suspension showed 96% colonization after 21 d, whereas four fern species and five flowering plants, similarly treated, gave colonization frequencies of 0-3%. Other glasshouse-grown bracken, similarly sprayed, showed that colonization declined over 5 months from 75% to 40%, and that the fungus showed little spread into fresh unsprayed growth on these plants. The possible species specificity of the fungus is discussed.
在英国、匈牙利和澳大利亚采集了欧洲蕨（Pteridium aquilinum (L.) Kuhn）样本，以研究其被蕨生壳针孢（Stagonospora pteridiicola）定殖的情况。英国样本在9月的定殖率最高，达68%，在生长季开始时为12%。匈牙利样本显示出类似的频率。在澳大利亚的欧洲蕨中未发现该真菌。5月，除欧洲蕨外，其他5种野外采集的蕨类植物未检测到该真菌，而此时欧洲蕨羽片的定殖频率已达12%。11月欧洲蕨死亡后进行采样，结果表明该真菌作为腐生菌持续生长。对温室种植的欧洲蕨喷洒孢子悬浮液，21天后定殖率达96%，而同样处理的4种蕨类植物和5种开花植物的定殖频率为0 - 3%。对其他温室种植的欧洲蕨进行类似喷洒处理，结果显示定殖率在5个月内从75%降至40%，且该真菌在这些植物上几乎没有扩散到未喷洒的新生长部位。本文讨论了该真菌可能存在的物种特异性。
