Nuclear cycle observed within urediniospores of hemileia vastatrix as revealed by image cytometry with quantification of dna content after feulgen staining.(A) Sequence of nuclear events from spore-mother cells in uredinium (I) through karyogamy and meiosis I as the spores develop, reach maturity and enter interphase (XI), followed by a delayed meiosis II which occurs when the spores germínate...
Sugarcane cultivars susceptible to orange rust can host sub-populations of puccinia kuehnii capable of infecting resistant cultivars... In an initial screening, 1,068 single-uredinium rust isolates from three susceptible cultivars were each inoculated in the laboratory on one of five sugarcane cultivars resistant to orange rust....
Symptoms and morphology of coffee leaf rust, hemileia vastatrix....(bar = 0.5 cm); (D) Uredinium showing arrangement of spores (bar = 20 µm); (E) Urediniospores - showing the thickened, heavily-ornamented or verrucose upper wall – containing carotenoid lipid guttules...
Uredinia and urediniospores of pst are parasitized by cladosporium cladosporioides.A: A uredinium infected by C....
