01771nas a2200241 4500008004100000245011100041210006900152300001300221490000800234520102800242653001901270653001801289653001301307653001401320653001501334653002801349100001701377700001601394700001301410700001401423700001801437856007401455 2009 eng d00aLimiting temperatures for urediniospore germination are low in a systemic rust fungus of tallgrass prairie0 aLimiting temperatures for urediniospore germination are low in a a390 -3940 v1013 a
Potential responses of plant disease phenology to climate change have been addressed primarily in agricultural systems. As a first step toward understanding the phenology of Uropyxis petalostemonis, a rust fungus commonly infecting the legume Dalea candida in USA tallgrass prairie, we evaluated the effects of temperature on urediniospore germination. While urediniospore germination for many rust fungi has been reported to decline only when temperatures are well above 25 C, in vitro germination of U petalostemonis dropped sharply at this temperature. Responses observed on water agar, potato dextrose agar and lima bean agar were similar, although lima bean agar supported a higher percentage germination overall. The low limiting temperatures suggest that most epidemically important new infections by U petalostemonis occur in spring. High summer temperatures in tallgrass prairie might push infection by this rust fungus species to earlier in the year and select for stronger systemic growth characteristics.
10aBasidiomycetes10aDalea candida10aFabaceae10aphenology10aUredinales10aUropyxis petalostemonis1 aWorapong, J.1 aDendy, S.P.1 aTang, Z.1 aAwl, D.J.1 aGarrett, K.A. uhttps://www.tandfonline.com/doi/abs/10.3852/08-102?journalCode=umyc20