Contrasting Roles of Deoxynivalenol and Nivalenol in Host-Mediated Interactions between Fusarium graminearum and Sitobion avenae.
Contrasting Roles of Deoxynivalenol and Nivalenol in Host-Mediated Interactions between Fusarium graminearum and Sitobion avenae.
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DOI：
10.3390/toxins8120353
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发表时间：
2016-11-30
期刊：
影响因子：
4.2
通讯作者：
Ray RV
中科院分区：
文献类型：
--
作者：
Drakulic J;Kahar MH;Ajigboye O;Bruce T;Ray RV
禾谷镰刀菌是欧洲和北美地区镰刀菌穗腐病的主要致病菌种。该菌种存在不同的化学型，每种化学型都能产生大量的真菌毒素。不同化学型的菌株可产生雪腐镰刀菌烯醇（NIV）和脱氧雪腐镰刀菌烯醇（DON），它们对哺乳动物和植物的毒性不同。然而，每种真菌毒素对植物宿主挥发性物质排放的影响尚不清楚。宿主挥发物在宿主选择过程中会被昆虫食草动物（如麦长管蚜，一种英国的谷类蚜虫）所识别。先前的研究表明，产DON的禾谷镰刀菌感染的小麦会对麦长管蚜产生驱避作用，本研究旨在确定病原菌真菌毒素对宿主挥发性化学物质的影响。对受感染宿主的挥发性物质进行了收集，并对有翅蚜进行了嗅觉仪生物测定。对产DON和NIV的菌株感染情况进行了比较，同时也对源自产NIV菌株的单端孢霉烯族化合物缺陷型转化体进行了比较。这项工作证实了积累DON的受感染宿主具有驱避特性。NIV的积累产生了对蚜虫有吸引力的挥发物。当没有NIV时，这种吸引力就不会出现，因此，这是产生NIV的直接结果。
Fusarium graminearum is the predominant causal species of Fusarium head blight in Europe and North America. Different chemotypes of the species exist, each producing a plethora of mycotoxins. Isolates of differing chemotypes produce nivalenol (NIV) and deoxynivalenol (DON), which differ in toxicity to mammals and plants. However, the effect of each mycotoxin on volatile emissions of plant hosts is not known. Host volatiles are interpreted by insect herbivores such as Sitobion avenae, the English grain aphid, during host selection. Previous work has shown that grain aphids are repelled by wheat infected with DON-producing F. graminearum, and this study seeks to determine the influence of pathogen mycotoxins to host volatile chemistry. Volatile collections from infected hosts and olfactometer bioassays with alate aphids were performed. Infections with isolates that produced DON and NIV were compared, as well as a trichothecene deficient transformant derived from the NIV-producing isolate. This work confirmed the repellent nature of infected hosts with DON accumulation. NIV accumulation produced volatiles that were attractive to aphids. Attraction did not occur when NIV was absent and was, therefore, a direct consequence of NIV production.
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影响因子：
3.2
作者：
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