To inoculate A.tumefaciens into the embryonic apical meristerm of the soaked seeds,a region on the seed suiface where a shoot would later emerge was pierced twice up to a depth of about 1 mm with a needle dipped in the A.tumefaciens inoculum.Germinated seedings were transplanted.One transgenic plantlet was obtained,which was confirmed by PCR assay and PCR-Southern blot.The transformation rate reached to 4.35%,and the feasibility of this method was proved,which could provid reference for the transgene of woody trees.
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