中文摘要：病原体禾谷镰刀菌，能产生霉菌毒素脱氧雪腐镰刀菌烯醇，与麦长管蚜共同寄生在小麦穗上。我们探索早期蚜虫感染对与禾谷镰刀菌感染相关的特异分子标记表达谱的影响。研究表明小麦穗先期感染蚜虫影响了植物响应，对随后的禾谷镰刀菌感染有重要作用，使真菌能更快地定植小麦穗。
外文摘要：The pathogen Fusarium graminearum, producer of the mycotoxin deoxynivalenol, and Sitobion avenae aphids both reside on wheat ears. We explored the influence of an earlier aphid infestation on the expression profile of specific molecular markers associated with F. graminearum infection. Using reverse transcription‐quantitative polymerase chain reaction analysis, we followed the expression of wheat defence genes on S. avenae infestation and explored the effect on a subsequent F. graminearum infection. This was performed by the assessment of disease symptoms, fungal biomass, mycotoxin production and number of aphids at several time points during disease progress. Wheat ears infected with F. graminearum showed more disease symptoms and higher deoxynivalenol levels when ears were pre‐exposed to aphids relative to a sole inoculation with F. graminearum. Aphids induced defence genes that are typically induced on F. graminearum infection. Other defence genes showed earlier and/or enhanced transcription after exposure to both aphids and F. graminearum. In the discussion, we link the symptomatic and epidemiological parameters with the transcriptional induction pattern in the plant. Our study suggests that pre‐exposure of wheat ears to aphids affects the plant response, which plays a role in the subsequent attack of F. graminearum, enabling the fungus to colonize wheat ears more rapidly.
外文关键词：Fusarium graminearum；mycotoxin production；plant defence；Sitobion avenae；Triticum aestivum
作者：De Zutter, N；Audenaert, K；Ameye, M；De Boevre, M；De Saeger, S；Haesaert, G；Smagghe, G
作者单位：Univ Ghent
期刊名称：MOLECULAR PLANT PATHOLOGY
期刊影响因子：4.335
出版年份：2017
出版刊次：1
点击下载：由麦长管蚜和禾谷镰刀菌联合攻击小麦穗诱导的植物响应提高了真菌感染和脱氧雪腐镰刀菌烯醇的产生