The life history of Puccinia striiformis remains a mystery because the alternate host has never been identified. Inoculation of grasses using aeciospores from naturally infected Berberis chinensis and B. koreana resulted in infection on Poa pratensis, producing uredinia typical of stripe rust caused by P. striiformis. Analyses using real-time polymerase chain reaction and DNA sequence confirmed...

the stripe (yellow) rust in wheat is one of the most important plant diseases in iran. since 1993 several epidemics have occurred in iran causing the breakdown of widely util-ized sources of resistance in wheat cultivars. twenty-seven pathotypes were identified during 2003 and 2004 in greenhouse tests. pathotypes 6e6a+, 6e22a+, 6e130a+, 6e134a+, 6e142a+, 6e158a+, 134e130a+ and 134e142a+ were mo...

Morphological studies and phylogenetic analysis based on the ITS sequence data showed that there is considerable differences within the Puccinia striiformis complex on members of Triticeae(Triticum and Hordeum), Dactylis glomerata and Poa pratensis. Based on the above molecular and morphological data, we suggest dividing P. striiformis as follows: - P. striiformis s. str. mainly on Triticeae. -...

the percentage of urediniospore germination of two isolates of yellow rust {puccinia striiformis f. sp. tritici) namely, wyr 69/10 |race 104e 137(1)] and isolate wyr 79/4 |race 41e 139 (4)], was studied at various temperatues between 5-20°c on agar and the adaxial surface of detached leaves on a layer of benzimidazole agar. four replicates for five temperature treatments were arranged as a ...

A number of different fungal hyperparasites have been observed to grow in pustules of rust fungi. Examples of these are Verticillium (HASSEBRAUK 1936, KOTTHoFF 1937, GAMS 1971), Darluca fi/um (KRANz 1973), Monocillium nordinii (TSUNEDA and HIRATSUKA 1980), Alternaria and Cladosporium species (OMAR and HEATHER 1979). Verticillium lecanii may be the most interesting fungus for biological control ...

Stripe rust of barley, caused by Puccinia striiformis f. sp. hordei (PSH), occurred mainly in California, Idaho, Oregon, and Washington and caused localized damage to barley crops. Growing cultivars with high-temperature, adult-plant resistance and the cropping system contributed to the low level of stripe rust. Stripe rust samples were collected from the four states and tested under controlled...

Recent disease outbreaks caused by (re-)emerging plant pathogens have been associated with expansions in pathogen geographic distribution and increased virulence. For example, in the past two decades' wheat yellow (stripe) rust, Puccinia striiformis f. sp. tritici, has seen the emergence of new races that are adapted to warmer temperatures, have expanded virulence profiles, and are more aggress...

This article documents the addition of 171 microsatellite marker loci and 27 pairs of single nucleotide polymorphism (SNP) sequencing primers to the Molecular Ecology Resources Database. Loci were developed for the following species: Bombus pauloensis, Cephalorhynchus heavisidii, Cercospora sojina, Harpyhaliaetus coronatus, Hordeum vulgare, Lachnolaimus maximus, Oceanodroma monteiroi, Puccinia ...

ABSTRACT Most barley cultivars are resistant to stripe rust of wheat that is caused by Puccinia striiformis f. sp. tritici. The barley cv. Steptoe is susceptible to all identified races of P. striiformis f. sp. hordei (PSH), the barley stripe rust pathogen, but is resistant to most P. striiformis f. sp. tritici races. To determine inheritance of the Steptoe resistance to P. striiformis f. sp. t...

MACKO, V., E. J. TRIONE, and S. A. YOUNG. 1977. Identification of the germination self-inhibitor from uredospores of Puccinia striiformis. Phytopathology 67:1473-1474. The endogenous germination inhibitor from uredospores a germination assay employing fresh, water-washed, stripe of the stripe rust fungus, Puccinia striiformis, was identified rust uredospores. The chemical structure was confirme...