Australian Uromyces viciae‐fabae: Host and nonhost interaction among cultivated grain legumes. (16th June 2020)

• Record Type: Journal Article
• Authors: Ijaz, Usman; Ayliffe, Michael; Adhikari, Kedar; Bariana, Harbans; Bansal, Urmil
• Is Part Of: Plant pathology. Volume 69:Number 7(2020)
• Page Start: 1227
• Page End: 1236
• Publication Date: 2020-06-16
• Subjects: fungal microscopy -- host range -- nonhost resistance -- Uromyces viciae‐fabae; Agricultural pests -- Periodicals; Plant diseases -- Periodicals; 632
• DOI: 10.1111/ppa.13222
• Languages: English
• ISSNs: 0032-0862

Abstract

Abstract: 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. Abstract : Uromyces viciae‐fabae, a known pathogen of faba bean (ex Vicia faba ), may acquire virulence on field pea in future, but it is unlikely to parasitize other legumes (chickpea, lentil, lupin, and mung bean) in Australia.