Coevolution of the Ipomoea-Coleosporium Natural Plant-Fungus Pathosystem by Thomas Mackey Chappell Department of Biology Duke University Date:_______________________ Approved: ___________________________ Mark D. Rausher, Supervisor ___________________________ Xinnian Dong ___________________________ William G. Wilson ___________________________ Rytas Vilgalys ___________________________ John H....

From June to October 2012, severe outbreaks of rust disease on Solidago virgaurea var. gigantea were observed in 5 different regions of Ulleung-do, Korea. Typical rust symptoms appeared as yellow spots, uredinia on leaves, and massive urediniospores covering the entire plant. Severely infected plants became discolored and died. On the basis of its morphological and molecular characteristics, th...