Search on : Taxa descriptions

 


 
 Add this item to the list   434481 NO1
   
Literature:
 
Page number:267 
Remarks (internal):The genus Peltaster was established by Sydow & Sydow in 1917; the type species is Peltaster hedyotidis Syd. & P. Syd. Sutton and his colleagues described P. fructicola (Johnson et al. 1996) as one of the pathogens of sooty blotch and later associated it with punctate mycelial type on apple (Williamson et al. 2004). Since then, this fungus has been found widely in the eastern and midwestern United States (Johnson et al. 1997, Batzer et al. 2005, Díaz Arias et al. 2010). As the etiology of SBFS is studied worldwide, P. fructicola has been reported to cause sooty blotch in many other countries and regions, including Serbia, Montenegro, and Poland (Ivanović et al. 2010, Mirzwa-Mróz & Wińska-Krysiak 2011), indicating that P. fructicola is among the most prevalent SBFS species.
Based on phylogenetic analysis of the ITS region and morphological comparison, we identified our isolates as Peltaster fructicola, a newly recorded species for China. To our knowledge, this is also the first report of SBFS on crabapple and hawthorn caused by P. fructicola.
 
Description type:Non-original description 
Description:Peltaster fructicola Eric M. Johnson, T.B. Sutton & Hodges, Mycologia 88(1): 120, 1996 Fig. 2
Hyphae smooth, septate, branched, hyaline and turning to pale brown as culture aged, 1.5-2.0 µm wide. Conidiophores absent. Conidiogenous cells hyaline, monoblastic, intercalary, formed directly on undifferentiated hyphae. Conidiogenous loci inconspicuous, stub-shaped, concolorous with conidiogenous cells. Conidia solitary, unicellular, hyaline, elliptic to ovoidal, produced in basipetal order from the conidiogenous loci and aggregated in masses near the conidiogenous cells, 4-6.5(-7) x 1.5-2.5 µm. Microcyclic conidiation observed in culture, with expansion and germination of conidia. Conidia on WA slightly smaller in size than those on SNA, 4-6(-7) x 1.5-2.0 µm.
Cultural characteristics - On PDA erumpent, compact, with smooth, crenate margin and sparse to no aerial mycelium, surface strongly folded, outer zone light gray, center greenish gray to olivaceous-gray, reverse black with yellow masses of conidia at the bottom of the colony; reaching (13-)14(-16) mm diam after 21 d at 25°C in the dark.
On peels of crabapple fruit, showing punctate mycelial type, visible mycelial mat with dull brown, flattened, circular or irregular sclerotium-like bodies, 68-145 µm diam. On peels of hawthorn fruit similar, sclerotium-like bodies 62-223 µm diam.
 
Taxon name: