Several reports (7, 8, 22) have described apparently fundamental changes in the rates and nature of respiratory pathways during infection of higher planit tissues by obligate parasites, particularly rust fungi. Although disease can cause increases of 400 % in rates with a marked lowering of C6/C1 ratios, there is considerable uncertainty about the carbohydrate changes which accompany the respir...

The obligate biotrophic nature of rust fungi calls for an in planta selection scheme as a means of developing a rust transformation technology. We show that the fungicides benomyl (used as its formulated product benlate) and carboxin suppress morphogenesis of the rust fungus Uromyces fabae in vitro and disease in planta, the latter without affecting the health of the host. The limits of their a...

Daylilies (Hemerocallis spp., Liliaceae) are one of the most important cultivated perennial plants in the United States. Daylily rust, a serious disease caused by Puccinia hemerocallidis Thüm., was observed in Georgia in August 2000 (14) and was found in at least 20 other states and in Costa Rica in 2001. It was originally described from Russia, reported throughout the Japanese archipelago, and...

Efficient nutrient mobilization is a key element for biotrophic plant parasites such as the rust fungi. In the course of a cDNA library screen for elements involved in sugar utilization in Uromyces fabae, we identified a sequence with homology to beta-glucosidases. Full-length genomic and cDNA clones of the gene, termed BGL1, were isolated and sequenced. The BGL1 gene comprises 3,372 nucleotide...

A rust fungi species, Uromyces euphorbiae Cooke & Peck (Pucciniaceae) on Euphorbia cheiradenia Boiss. Hohen. (Euphorbiaceae) is reported for the first time from Malatya Turkey and also as a new host species fungi. The morphological microscopical features of this are described with figures.

Rust diseases caused by fungi of the order Pucciniales afflict a wide range of plants, including cereals, legumes, ornamentals, and fruit trees, and pose a serious threat to cropping systems and global food security. The obligate parasitic lifestyle of these fungi and their complex life cycles, often involving alternate hosts for the sexual and asexual stages, also make this group of pathogens ...

In a 1989 publication, the 74 species of rust fungi (order Uredinales) known to occur in Hawai'i were listed, based on newly collected material; herbarium specimens, principally those at the Bernice P. Bishop Museum (BISH); and information provided by F. L. Stevens in his 1925 publication on Hawaiian fungi. Stevens had noted an underrepresentation of this group in Hawai'i, which he attributed t...