Abstract
The efficiency of Vigna mungo L. Hepper transformation was significantly increased from an average of 1% to 6.5% by using shoot apices excised from embryonic axes precultured on 10 microM benzyl-6-aminopurine (BAP) for 3 days and wounded prior to inoculation in Agrobacterium tumefaciens strain EHA105 carrying the binary vector pCAMBIA2301, which contains a neomycin phosphotransferase gene (nptII) and a beta-glucuronidase (GUS) gene (gusA) interrupted by an intron. The transformed green shoots that were selected and rooted on medium containing kanamycin, and which tested positive for nptII gene by polymerase chain reaction, were established in soil to collect seeds. GUS activity was detected in whole T(0) shoots and T(1) seedlings. All T(0) plants were morphologically normal, fertile and the majority of them transmitted transgenes in a 3:1 ratio to their progenies. Southern analysis of T(1) plants showed integration of nptII into the plant genome.
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