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Rust fungi grow intracellularly, and make spore-producing fruiting bodies within or, more often, on the surfaces of affected plant parts. [3] Some rust species form perennial systemic infections that may cause plant deformities such as growth retardation, witch's broom, stem canker, galls, or hypertrophy of affected plant parts.
General symptoms that one can notice while looking at the leaves of a faba bean plant that has this rust disease are that the leaves will have numerous small, orange/brown pustules. These pustules are surrounded by a light yellow halo. The yellow halo is where the plant has blocked the spread of the fungus to healthy cells.
Puccinia is a genus of fungi.All species in this genus are obligate plant pathogens and are known as rusts. [1] The genus contains about 4000 species. [2]The genus name of Puccinia is in honour of Tommaso Puccini (died 1735), who was an Italian doctor and botanist who taught anatomy at Hospital of Santa Maria Nuova in Florence.
Puccinia poarum, a species of fungus, known as the coltsfoot gall rust, [3] or meadow grass rust, is a plant pathogen. This fungal parasite forms a yellow to orange gall, 1–2 cm in diameter, on the underside of leaves of coltsfoot (Tussilago farfara). [4] It also infects but does not gall grasses of the family Poaceae. [5]
Puccinia monoica is a parasitic rust fungus of the genus Puccinia that inhibits flowering in its host plant (usually a Boechera species) and radically transforms host morphology in order to facilitate its own sexual reproduction.
The spruce cone rust, caused by the rust fungus Chrysomyxa pirolata Wint., affects spruces in 3 continents, including white spruce in Canada (Hiratsuka 1987). [1] Alternate hosts of the fungus are several species among 3 genera of wintergreen: Pyrola spp., Orthilia spp., and Moneses spp. (Ziller 1974, Sutherland et al. 1984).