PDF(Pubmed)
Abstract：
Fusarium head blight (FHB) is a major threat to wheat crop production and food security worldwide. The creation of resistant wheat cultivars is an essential component of an integrated strategy against Fusarium graminearum, the primary aetiological agent that causes FHB. The results of this study show that the deployment of proto-cooperative interactions between wheat genotypes and mycoparasitic biocontrol agents (BCAs) can improve crop yield and plant resistance in controlling the devastating effects of FHB on wheat agronomic traits. A Fusarium-specific mycoparasite, Sphaerodes mycoparasitica, was found to be compatible with common and durum wheat hosts, thus allowing the efficient control of F. graminearum infection in plants. Four genotypes of wheat, two common wheat, and two durum wheat cultivars with varying FHB resistance levels were used in this greenhouse study. The BCA treatments decreased FHB symptoms in all four cultivars and improved the agronomic traits such as spike number, spike weight, seed weight, plant biomass, and plant height which are vital to grain yield. Conversely, the F. graminearum 3ADON chemotype treatment decreased the agronomic trait values by up to 44% across cultivars. Spike number, spike weight, and seed weight were the most improved traits by the BCA. A more measurable improvement in agronomic traits was observed in durum wheat cultivars compared to common wheat.
摘要：
枯萎病（FHB）是全球小麦作物生产和粮食安全的主要威胁。抗性小麦品种的创建是针对镰刀菌的综合策略的重要组成部分，引起FHB的主要病因。这项研究的结果表明，在控制FHB对小麦农艺性状的破坏性影响方面，小麦基因型与霉菌寄生生物防治剂（BCAs）之间的原始合作相互作用的部署可以提高作物产量和植物抗性。镰刀菌属特异性的霉菌病菌,玄武岩,被发现与普通和硬粒小麦宿主相容，从而允许有效控制植物中的F.graminearum感染。小麦的四种基因型，两种普通小麦，在此温室研究中使用了两个具有不同FHB抗性水平的硬粒小麦品种。BCA处理减少了所有四个品种的FHB症状，并改善了农艺性状，例如穗数，尖峰重量,种子重量,植物生物量，和对谷物产量至关重要的植物高度。相反，禾谷F.3ADON化学型处理使各个品种的农艺性状值降低了44％。穗数,尖峰重量,种子重量是BCA改善最多的性状。与普通小麦相比，在硬粒小麦品种中观察到农艺性状的改善更为明显。
