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. 1989 Nov;91(3):1212–1218. doi: 10.1104/pp.91.3.1212

Transformation of Soybean (Glycine max) by Infecting Germinating Seeds with Agrobacterium tumefaciens

Paula P Chee 1, Krystal A Fober 1, Jerry L Slightom 1
PMCID: PMC1062142  PMID: 16667134

Abstract

The transfer of genetic material into soybean tissue was accomplished by using an avirulent strain of Agrobacterium tumefaciens which contained the binary vector pGA482. The method used for transformation requires no tissue culture steps as it involves the inoculation of the plumule, cotyledonary node, and adjacent cotyledon tissues of germinating seeds. The identification of neomycin phosphotransferase (NPT) II enzyme activity in the tissues of 16 (R0) soybean plants indicated that the plant expressible Nos-NPT II gene, contained within the T-DNA region from pGA482, had been transferred at least into somatic tissues. Putative transformed R0 soybean plants were advanced to produce R1 plants which were also assayed for the presence of the transferred Nos-NPT II gene. The combined results of these assays indicated that about 0.7% of the surviving inoculated seeds yielded transformed tissues in the R0 plant, and that about 1/10 of these plants yielded transformed R1 plants. The presence of the Nos-NPT II gene in DNAs isolated from both R0 and R1 plant was demonstrated by using genomic blot hybridization and polymerase chain reaction methods. Integration of this gene into the soybean genome was demonstrated for three R1 soybean plants.

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