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This article presents abstracts of various lectures to be given at the 7th Congress of the Federation of European Societies of Plant Physiology, which will be held in Umeå, Sweden, from August 5-10, 1990. One of the lectures is related to cyanobacterial plant symbioses. A unique character of some diazotrophic cyanobacteria is their ability to form symbioses with a wide range of plants. Another lecture discusses infection and root nodule establishment in the frankia symbioses. Host fungus interactions in micorrhizae is also one of the topics of these lectures.

The article presents information about papers presented at the International Meeting on Frankia and Actinorhizal held between August 17 to 20, 1986 in Sweden. The nitrogen-fixing actinomycete Frankia, forms root nodule symbioses with nearly 200 species of woody dicotyledonous plants. The interdisciplinary meeting included the taxonomy, genetics, physiology and ecology of free-living Frankia, the genetics and physiology of host plants. The meeting was attended by 55 scientists from 13 countries.

This article presents an announcement of "International Meeting on Frankia and Actinorhizal Plants," that would be on 17-20 August, 1986 at Umeå, Sweden.