Baverstock J, Elliot S L, Alderson P G, Pell J K
Plant and Invertebrate Ecology Division, Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK.
J Invertebr Pathol. 2005 Jun;89(2):157-64. doi: 10.1016/j.jip.2005.05.006.
We used a model plant-aphid system to investigate whether the aphid-specific entomopathogenic fungus Pandora neoaphidis responds to aphid-induced defence by the broad-bean plant, Vicia faba. Laboratory experiments indicated that neither in vivo sporulation, conidia size nor the in vitro growth of P. neoaphidis was affected by Acyrthosiphon pisum-induced V. faba volatiles. The proportion of conidia germinating on A. pisum feeding on previously damaged plants was significantly greater than on aphids feeding on undamaged plants, suggesting a direct functional effect of the plant volatiles on the fungus. However, there were no significant differences in the infectivity of P. neoaphidis towards A. pisum feeding on either undamaged V. faba plants or plants previously infested with A. pisum. Therefore, these results provide no evidence to suggest that P. neoaphidis contributes to plant indirect defence strategies.
我们使用了一种模式植物-蚜虫系统来研究蚜虫特异性昆虫病原真菌新蚜虫疠霉是否会对蚕豆（Vicia faba）植株受蚜虫诱导产生的防御反应做出响应。实验室实验表明，豌豆蚜诱导的蚕豆挥发物既不影响新蚜虫疠霉的体内产孢、分生孢子大小，也不影响其体外生长。在取食过先前受损植株的豌豆蚜上萌发的分生孢子比例显著高于取食未受损植株上的蚜虫，这表明植物挥发物对真菌有直接的功能影响。然而，新蚜虫疠霉对取食未受损蚕豆植株或先前已被豌豆蚜侵染过的植株上的豌豆蚜的感染力没有显著差异。因此，这些结果没有提供证据表明新蚜虫疠霉有助于植物的间接防御策略。
