title: The effect of ultra violet light on the symbiotic effectiveness and some physiological characteristics of four strains of Rhizobium trifolii.
mesh_terms: D000143:Acids / Q000096:biosynthesis; D003470:Culture Media; D009154:Mutation; D009586:Nitrogen Fixation / Q000528:radiation effects; D011135:Polysaccharides, Bacterial / Q000096:biosynthesis; D011830:Radiation Effects; D012231:Rhizobium / Q000254:growth & development / Q000378:metabolism / Q000528:radiation effects*; D013559:Symbiosis / Q000528:radiation effects*; D014466:Ultraviolet Rays
chemical_list: D000143:Acids; D003470:Culture Media; D011135:Polysaccharides, Bacterial