Pathogenicity and in planta mycotoxin accumulation among members of the Fusarium graminearum species complex on wheat and rice
Pathogenicity and in planta mycotoxin accumulation among members of the Fusarium graminearum species complex on wheat and rice
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DOI：
10.1094/phyto-95-1397
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发表时间：
2005-12-01
期刊：
影响因子：
3.2
通讯作者：
Kistler, HC
中科院分区：
文献类型：
--
作者：
Goswami, RS;Kistler, HC
赤霉病（Fusarium head blight，FHB）是一种由禾谷镰刀菌（Fusarium grominearum）物种复合体成员引起的小型谷物的破坏性疾病，该复合体由至少9种不同的神秘物种组成。已知该复合物的成员产生真菌毒素，包括二孢霉烯脱氧雪腐镰刀菌烯醇（DON）沿着其乙酰化衍生物和雪腐镰刀菌烯醇（NIV）。在这项研究中，31株，属于8种这种复杂的和来自不同的主机或基板，进行了测试的侵略性和霉菌毒素生产的差异。菌株之间的变化很大，无论是在他们的侵略性和能力，以产生对小麦的敏感品种的histothecenes被发现;变化似乎是一个特定的菌株，而不是物种特异性的特征。虽然致病性不受所产生的真菌毒素的类型的影响，一个显着的相关性之间观察到的数量占主导地位的二孢霉烯（DON及其乙酰化形式或NIV）产生的每个菌株和其对小麦的侵略性水平。还测试了一些分离物感染水稻品种的能力。M201，通常在美国种植。虽然测试菌株能够在温室条件下感染水稻并引起显著量的病害，但从被感染的水稻小花中未检测到稻瘟病菌。
Fusarium head blight (FHB), or scab, is a destructive disease of small grains caused by members of the Fusarium grominearum species complex, comprised of at least nine distinct, cryptic species. Members of this complex are known to produce mycotoxins including the trichothecenes deoxynivalenol (DON) along with its acetylated derivatives and nivalenol (NIV). In this study, 31 strains, belonging to eight species of this complex and originating from diverse hosts or substrates, were tested for differences in aggressiveness and mycotoxin production. Large variation among strains, both in terms of their aggressiveness and the ability to produce trichothecenes on a susceptible cultivar of wheat was found; variation appears to be a strain-specific rather than species-specific characteristic. While pathogenicity was not influenced by the type of mycotoxin produced, a significant correlation was observed between the amount of the dominant trichothecene (DON and its acetylated forms or NIV) produced by each strain and its level of aggressiveness on wheat. Some isolates also were tested for their ability to infect rice cv. M201, commonly grown in the United States. While tested strains were capable of infecting rice under greenhouse conditions and causing significant amount of disease, no trichothecenes could be detected from the infected rice florets.