Phosphorus is important in nodulation of actinorhizal plants and legumes

摘要

Actinorhizal plants form N_2-fixing root nodules with the actinomycete Frankia. There are some 200 species of actinorhizal plants belonging to 25 genera in eight families (Huss-Danell 1997). Nearly all of them are woody plants. They are useful in soil reclamation, bioenergy production, as wind-breaks and as ornamentals. Some species serve as browse, and Hippophae rhamnoides has edible and highly nutritious fruits and can provide raw material for phytochemical products. Representatives of actinorhizal plants are native in most regions of the world and several species, in particular Casuarina spp., are planted in many areas.