Co-Authors:
Kishinevsky, B., Division of Legume Inoculation, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Gurfel, D., Division of Legume Inoculation, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Löbel, R., Division of Legume Inoculation, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Nemas, C., Division of Legume Inoculation, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
Abstract:
A double-antibody sandwich form of the enzyme-linked immunosorbent assay (ELISA) was used for serological identification of IS peanut Rhizobium strains both in cell suspension of pure culture and in single root nodules. This technique enabled specific detection of culture antigens in cell suspensions of 104-105 cells/ml. The serological ELISA specificity of strains tested generally follows that of the somatic agglutination. The use of the ELISA technique for counting peanut rhizobia in peat inoculants was evaluated. In dilutions of suspensions prepared from combined samples of Arachis hypogaea nodules positive ELISA values were obtained with 0.4 mg/ml fresh wt of nodule tissues. Even the smallest nodules, weighing only 2-8 mg, contained enough antigen for successful performance of the ELISA test. In mixed strain inoculation experiments using five peanut Rhizobium strains, the ELISA technique was employed to determine which strains were present in the nodules formed. An attempt was made to use ELISA for determination of nodulation success of rhizobia applied to soils harboring indigenous rhizobia. © 1982 Taylor & Francis Group, LLC.
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