title: Ultrastructure of root nodules formed by ineffective strains of Rhizobium meliloti.
mesh_terms: D001439:Bacteroides / Q000378:metabolism; D004721:Endoplasmic Reticulum / Q000378:metabolism; D000455:Medicago sativa / Q000187:drug effects / Q000378:metabolism; D008854:Microscopy, Electron; D008928:Mitochondria / Q000378:metabolism; D009154:Mutation; D009584:Nitrogen / Q000494:pharmacology; D009586:Nitrogen Fixation; D059828:Plant Cells; D010935:Plant Diseases; D012231:Rhizobium / Q000166:cytology / Q000378:metabolism*; D013213:Starch; D013559:Symbiosis
chemical_list: D013213:Starch; D009584:Nitrogen