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Quantifying Infection of Wheat by Races of Pyrenophora tritici-repentis Producing Different Host-Selective Toxins
DownloadFall 2018
Pyrenophora tritici-repentis, the cause of tan spot of wheat, produces several host-selective toxins (HSTs), including Ptr ToxA and Ptr ToxB. Ptr ToxA-producing isolates are predominant in Canada, while Ptr ToxB-producing isolates are extremely rare. The reason for the scarcity of ToxB+ isolates...
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Spheroidal gall formation and seedborne infestation by Plasmodiophora brassicae as overlooked aspects of clubroot biology and epidemiology
DownloadFall 2011
Plasmodiophora brassicae, the causal agent of clubroot, can infect many species of the Brassicaceae. Infection results in the formation of galls on the roots of susceptible plants. Most galls are spindle-shaped, but spheroid galls can also develop and are regarded as resistance structures....
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Fall 2012
Tan spot is an important foliar disease of wheat caused by Pyrenophora tritici-repentis. This fungus produces Ptr ToxB, a host-specific toxin that induces chlorosis on sensitive host genotypes. An assessment of the effects of Ptr ToxB in a toxin-sensitive wheat line revealed that photosynthesis,...