Abstract
Several factors were investigated for their influence on the transfer of an intron-containing β-glucuronidase (GUS) gene into blueberry (Vaccinium spp.) leaf explants during the early stages of Agrobacterium-mediated gene transfer, including days of cocultivation, strain of Agrobacterium tumefaciens, explant age and genotype. The number of GUS-expressing leaf zones and calli were counted immediately and 2 weeks after cocultivation, respectively, to evaluate the gene transfer process. Agrobacterium tumefaciens strain EHA105 (pEHA105/p35SGUS-int) was significantly more effective for transformation than strain LBA4404 (pAL4404/p35SGUSint). Four days of cocultivation with A. tumefaciens strain EHA105 yielded about 50-fold more GUS-expressing zones than 2 days of cocultivation. Significant differences among cultivars were observed for both GUS-expressing leaf zones and calli. For some cultivars, explant age influenced the number of GUS-expressing leaf zones and calli. In most cases, the number of GUS-expressing calli was highest in those cultivars where GUS expression in the leaves was high.
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Received: 25 May 1998 / Revision received: 29 July 1998 / Accepted: 14 August 1998
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Cao, X., Liu, Q., Rowland, L. et al. GUS expression in blueberry (Vaccinium spp.): factors influencing Agrobacterium-mediated gene transfer efficiency. Plant Cell Reports 18, 266–270 (1998). https://doi.org/10.1007/s002990050569
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DOI: https://doi.org/10.1007/s002990050569