- Biochemistry and bioengineering
- Symbiotic nitrogen fixation
- Symbiotic signaling
- Nodule function
- Non-legume symbiotic nitrogen fixers
- Free living nitrogen fixers in aquatic and terrestrial environments
- Infection and invasion
- Other nitrogen-fixing and mycorrhizal symbioses
- Nodule development
- Diversity and evolution
- Agriculture and environmental impacts
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Marine Nitrogen-Fixing Symbioses (ONLY for the Satellite Meeting "From land to sea: Marine Nitrogen-Fixing Symbioses"
M. truncatula nodules induced with a Sinorhizobium meliloti strain expressing a lacZ reporter gene (infection thread).