Uromyces viciae‐fabae, rust of faba bean, parasitizes other legume crops such as lentils (Lens culinaris) and field peas (Pisum sativum) in some environments. In this study we examined the host range of two Australian isolates of U. viciae‐fabae collected and purified from a faba bean crop and classified as U. viciae‐fabae ex V. faba. Field pea (P. sativum), chickpea (Cicer arientinum), lupin (Lupinus spp.), lentil (L. culinaris), and mung bean (Vigna radiata) genotypes were tested with these isolates, as well as resistant and susceptible genotypes of the faba bean host. Race specificity for these two pathogen isolates was observed on Vicia faba, with two faba bean genotypes showing partial resistance. Both U. viciae‐fabae isolates also colonized field pea seedlings and successfully produced uredinia under glasshouse conditions, despite this fungus not being known as a pathogen of Australian field pea crops. No sporulation of either isolate of U. viciae‐fabae ex V. faba was observed on any of the remaining legume species tested. However, obvious differences in fungal growth were observed, ranging from small infection sites with very rare haustorium formation in mung bean to more extensive growth and the development of potential uredinial structures in chickpea. These observations are discussed in relation to the phylogenetic relationship of these host and nonhost species.

中文翻译：

---

澳大利亚Uromyces viciae-fabae：栽培豆类植物之间的寄主和非寄主相互作用

蚕豆锈菌Uromyces viciae-fabae在某些环境中寄生于其他豆类作物，例如小扁豆（Lens culinaris）和豌豆（Pisum sativum）。在这项研究中，我们检查了两个澳大利亚U分离株的宿主范围。蚜-蚜收集并从蚕豆作物纯化，并归类为ü。蚜，蚜EX V。蚕豆。豌豆（P. sativum），鹰嘴豆（Cicer arientinum），羽扇豆（Lupinus spp。），扁豆（L. culinaris）和绿豆（Vigna radiata）用这些分离物测试了基因型，以及蚕豆宿主的抗性和易感基因型。在蚕豆上观察到这两种病原体的种族特异性，其中两种蚕豆基因型表现出部分抗性。这两个ü。蚕豆分离株也定居在豌豆幼苗上，并在温室条件下成功产生了尿素，尽管这种真菌不被认为是澳大利亚豌豆作物的病原体。U的任一分离株均无芽孢形成。蚜，蚜EX V。蚕豆在测试的所有其余豆类物种中都观察到了这种现象。然而，观察到真菌生长的明显差异，从较小的感染部位到极少的绿豆中形成了很丰富的乌托氏菌，到鹰嘴豆中更广泛的生长和潜在的尿素结构的发育。讨论了与这些寄主和非寄主物种的系统发育关系有关的这些观察结果。