P. Tiffin

Local adaptation to mercury contamination by nitrogen-fixing rhizobia is driven by horizontal gene transfer, copy number, and enhanced gene expression

This study identifies that horizontal gene transfer, copy number, and enhanced expression of the Mer operon confer mercury tolerance in rhizobia, with implications for plant-metal interactions.

The spatial scale of adaptation in a native annual plant and its implications for responses to climate change

This study examines the spatial scale of local adaptation in common ragweed using common gardens and finds large adaptation scales with maladaptation in southern regions.

Partners in space: Discordant population structure between legume hosts and rhizobium symbionts in their native range

The paper compares population structure between legume hosts and rhizobium symbionts, finding discordant genetic patterns that may affect coevolution.

Host-associated rhizobia fitness: Dependence on nitrogen, density, community complexity, and legume genotype

This study examines how host genotype, nitrogen levels, rhizobial density, and community complexity affect the fitness of 68 rhizobial strains in the Ensifer meliloti - Medicago truncatula mutualism.

Climate change is predicted to disrupt patterns of local adaptation in wild and cultivated maize

The paper predicts climate change will disrupt local adaptation and migration in wild and cultivated maize, leading to potential maladaptation and production shocks.

Sanctions, partner recognition, and variation in mutualism

The paper models coevolution in mutualistic symbiosis, showing that variation in partner recognition and sanctioning ability can persist without destabilizing the mutualism.