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首页> 外文OA文献 >Characterization of Resistance to Pratylenchus thornei (Nematoda) in Wheat (Triticum aestivum): Attraction, Penetration, Motility, and Reproduction
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Characterization of Resistance to Pratylenchus thornei (Nematoda) in Wheat (Triticum aestivum): Attraction, Penetration, Motility, and Reproduction

机译：小麦（Triticum aestivum）对praphinchus thornei（线虫）的抗性表征：吸引力，渗透力，运动性和繁殖力

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摘要

Lines from a cross between two wheat (Triticum aestivum) cultivars with contrasting resistance phenotypes to Pratylenchus thornei (Nematoda) were investigated to determine the stage at which resistance occurs. Host resistance was examined at nematode attraction to and penetration of roots and nematode motility, maturation, and reproduction within roots. There was no significant difference in the rate at which P. thornei was attracted toward or penetrated resistant or susceptible roots. However, suppression of migration, juvenile maturation, and reproduction in and near resistant roots was evident, suggesting that resistance acts post penetration. No preferential root penetration zone was observed in contrast to other studies. The inhibitory compounds from resistant wheat plants appeared to be constitutively expressed and water soluble because nematode migration was suppressed in roots and root exudates of unchallenged seedlings. The effects of these compounds were reversible and affected P. thornei but not P. neglectus. Apart from migration, nematode multiplication was greatly inhibited by resistance because only a few juveniles (10%) developed past stage three in roots of resistant compared with susceptible plants. Earlier in the life cycle, egg deposition and hatch of P. thornei were also significantly reduced in resistant roots and root exudates, suggesting the presence of hatching inhibitors.
机译：研究了来自两种小麦（Triticum Aestivum）品种具有对比的抗性表型的血管表型对吡啶氏菌（奈卡罗托达）的含量之间的线，以确定发生抗性的阶段。在Nematode吸引和渗透到根部和线虫运动，成熟和繁殖中，检查了宿主抗性。 P. Thornei被吸引或穿透抗性或易感根的速率没有显着差异。然而，明显抑制迁移，幼年成熟和繁殖和近抗性根部的繁殖，表明阻力发生后渗透后。与其他研究相比，没有观察到优先的根渗透区。来自耐药小麦植物的抑制化合物似乎是组成型表达的，并且水溶性是因为线虫迁移被抑制在根系和根部渗出物中。这些化合物的效果是可逆的，并且影响P. Thornei但不是疏忽。除了迁移，线虫繁殖是大量的抵抗力抑制，因为只有几只少年（10％）在与易感植物相比的抗性中，在抗性的抗根中仅开发了过去的三个阶段。在生命周期之前，在抗性根和根部渗出物中也显着降低了P. Thornei的蛋沉积和孵化，表明存在孵化抑制剂。

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