Triticum monococcum L. and T. boeoticum L., diploid wild relatives of bread wheat (T. aestivum L.), possess resistance to leaf rust (also known as brown rust) caused by Puccinia triticina Eriks. Haustorium formation-based resistance mechanisms (i.e. pre-haustorial and post-haustorial resistance) to leaf rust have been studied and reported in various T. monococcum accessions. In the present study, the mechanism of leaf rust resistance in T. monococcum and T. boeoticum accessions was studied using confocal laser scanning microscopy. Components of resistance studied at a histological level against leaf rust pathotypes, a Mexican pathotype (TCB/TD) and a Swiss pathotype (97512-19), indicated different types of resistance mechanism operative in the two accessions. The resistance in T. monococcum ranged from pre-haustorial resistance against 97512-19 to post-haustorial resistance against TCB/TD. The response in T. boeoticum was post-haustorial with necrosis against the two pathotypes. Pre-haustorial resistance observed in T. monococcum could serve as a potential source of durable rust resistance in wheat breeding.

中文翻译：

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小麦野生近缘小麦Triticum monococcum L.和T. boeoticum L.的叶锈病抗性机制。

小麦土地T. boeoticumL.，面包小麦的二倍体野生近缘种（小麦L.)，对叶锈病（也称为褐锈病）具有抗性小麦锈菌埃里克。对叶锈病的基于Haustorium形成的抗性机制（即pre-haustorial和post-haustorial抵抗）已在各种研究和报道单球菌加入。在本研究中，叶锈病抗性机制在单球菌和T. boeoticum使用共聚焦激光扫描显微镜研究种质。在组织学水平上研究了针对叶锈病致病型、墨西哥致病型 (TCB/TD) 和瑞士致病型 (97512-19) 的抗性成分，表明两种种质中存在不同类型的抗性机制。中的阻力单球菌范围从对 97512-19 的吸液前阻力到对 TCB/TD 的吸液后阻力。中的回应T. boeoticum是对两种病理类型的坏死。中观察到的预吸音阻力单球菌可以作为小麦育种中持久抗锈病的潜在来源。