title: Studies on superoxide dismutase activities in virulent and avirulent strains of Agrobacterium tumefaciens and also in normal and crown gall tumor cells of Bryophyllum calycinum.
abstract: Superoxide dismutase activity in virulent strains of Agrobacterium tumefaciens was found to be higher than that in avirulent strains. Polyacrylamide gel electrophoresis revealed two isoenzymes in both these strains. These isoenzymes are suggested to be iron and manganese containing superoxide dismutases. Crown gall tumor cells of the plant Bryophyllum calycinum were found to have higher superoxide dismutase activity than the normal plant cells. Polyacrylamide gel electrophoresis revealed two isoenzymes in both normal and crown gall tumor cells. Advantages of the higher superoxide dismutase activities in respect of the survival of virulent strains of A. tumefaciens and crown gall tumor growth have been discussed.
mesh_terms: D007501:Iron / Q000032:analysis; D007527:Isoenzymes / Q000378:metabolism; D008345:Manganese / Q000032:analysis; D010941:Plant Tumors / Q000032:analysis*; D010944:Plants / Q000201:enzymology*; D012231:Rhizobium / Q000201:enzymology*; D013482:Superoxide Dismutase / Q000032:analysis / Q000378:metabolism*
chemical_list: D007527:Isoenzymes; D008345:Manganese; D007501:Iron; D013482:Superoxide Dismutase