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Although fitness costs associated with plant defensive traits are widely expected, they are not universally detected, calling into question their generality. Here we examine the potential for life history trade-offs associated with herbicide resistance by examining seed germination, root growth, and above-ground growth across 43 naturally occurring populations of Ipomoea purpurea that vary in their resistance to RoundUp, the most commonly used herbicide worldwide. We find evidence for lifedoi:10.1101/030833 fatcat:bn5j5ih55ba6fjtajyzabdmpvu