Environmental variation mediates the deleterious effects of Coleosporium ipomoeae on Ipomoea purpurea.

摘要: Variation in the environment is common within and between natural populations may influence selection on plant resistance by altering level of damage or fitness consequences from enemies. While much known about how environmental variation influences amount a experiences, few studies have attempted to determine alter damage, particularly plant-pathogen interactions. In this work we manipulated rust pathogen, Coleosporium ipomoeae, field experiments showed that pathogen reduced several components its host plant, Ipomoea purpurea. Furthermore, deleterious effects C. ipomoeae were variable. We identified quality plant's microenvironment, abundance secondary enemy length growing season as variable magnitude tolerance, causing interaction I. purpurea vary parasitism commensalism. Considering impacts negative important understanding spatially coevolution other