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UREDINIA mainly hypophyllous with spots surrounded by light green rings, mostly in groups, confluent, rounded, dark brown, erumpent.
Uredinia on abaxial surface of leaf, blackish brown, covered with ruptured epidermis, scattered.
Uredinia were epiphyllous, amphigenous to mostly adaxial and yellowish orange to mostly cinnamon.
Uredinia composed of fascicles of sporogenous cells that emerge through stomata becoming suprastomatal, mainly hypophyllous, numerous, often aggregated in angular spots surrounded by veins corresponding to pale, angular leaf spots on the upper leaf surface, 0.
Uredinia epiphylla, sparsa, obscure brunnea, epidermide fissa cincta; sporis 28-45 x 22-30 [micron]m, elipsoideis, piriformeis, episporio constanter 2-3 [micron]m crasso, dilute brunneo-cinnamomeis, breviter echinulato, poris germinationis 2 aequatorialibus.
Pgt urediniospore-color mutant strains SR22 (orange) and SR41 (gray) were chosen for the experiment because uredinia and urediniospores of the two strains can be visually distinguished in mixed inoculation treatments.
Uredinia on abaxial side of leaf, golden brown, scattered, solitary, subepidermal, covered by ruptured epidermis.
Resistant reactions included no visible symptom (immune), necrotic spots without sporulation (a hypersensitive reaction), and/or small uredinia less than 300 [micro]m in diameter.
Seedlings of KS00WGRC44 exhibited a low infection type of small necrotic uredinia [IT = 1 or lower on a scale of 0 to 4 (Roelfs et al.
THBJ Infection type ([dagger]) Genetic backgrounds 2NS segment absent 2NS segment present ([double dagger]) Thatcher 4 ;2 (-) ([double dagger]) Anza 33 (+) 2 (+) 3 (+) Yecora Rojo 4 ;2 Express 2 (+) 3 (+) ;2 (+) UC 1041 2 (+) 3 (+) ;1 (+) 2 (+) ([dagger]) 0 = Immune,; = necrotic flecks, 1 = necrotic flecks and small uredinia, 2 = small uredinia with chlorosis, 3 = moderate size pustules without chlorosis of necrosis, 4 = Large uredinia without necrosis or chlorosis.
The wheat cultivars, breeding lines, and Thatcher lines were evaluated 12 d after inoculation for IT using the scale in Long and Kolmer, 1989: 0 = no hypersensitive flecks, necrosis, or uredinia--0; = faint hypersensitive flecks--; = distinct hypersensitive flecks--1 = small uredinia surrounded by distinct necrosis--2 = small uredinia surrounded by distinct chlorosis--3 = moderate size uredinia without chlorosis or necrosis--4 = very large uredinia without chlorosis or necrosis.
Disease infection type was scored by pustule type on each plant with 0 = no macroscopic sign of infection and 4 = large uredinia and abundant sporulation.
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