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http://dx.doi.org/10.5010/JPB.2003.30.1.013

Distinct Spatio-temporal Expression Patterns of Patatin Promoter-GUS Gene Fusion in Transgenic Potato Microtubers  

Youm, Jung-Won (Laboratory of Plant Cell Biotechnology, Korea Research Institute of Bioscience Biotechnology)
Kim, Mi-Sun (Laboratory of Plant Cell Biotechnology, Korea Research Institute of Bioscience Biotechnology)
Lee, Byoung-Chan (Laboratory of Plant Cell Biotechnology, Korea Research Institute of Bioscience Biotechnology)
Kang, Won-Jin (Laboratory of Plant Cell Biotechnology, Korea Research Institute of Bioscience Biotechnology)
Jeon, Jae-Heung (Laboratory of Plant Cell Biotechnology, Korea Research Institute of Bioscience Biotechnology)
Joung, Hyouk (Laboratory of Plant Cell Biotechnology, Korea Research Institute of Bioscience Biotechnology)
Kim, Hyun-Soon (Laboratory of Plant Cell Biotechnology, Korea Research Institute of Bioscience Biotechnology)
Publication Information
Journal of Plant Biotechnology / v.30, no.1, 2003 , pp. 13-18 More about this Journal
Abstract
This study was carried out to investigate the expression patterns of foreign gene that controlled by tuber-specific patatin promoter in transgenic potatoes. Potato leaf disc cultured in vitro were transformed by the Agrobacterium strain LBA4404 containing pBl121 or pATGUS from potato cv. Desiree. In order to select the transgenic lines, gene-specific primers deduced from the NPTII were synthesized and used for polymerase chain reaction. The down part of the putative transgenic potatoes was transplanted weekly onto sucrose-enriched medium to accelerate the microtuber formation. RNA gel blot analysis was performed on the total RNAs obtained from tuber that had been harvested at a week interval. Also, histochemical assay was observed in the explants transformed with either pBI121 or pATGUS. Results showed that the transgenic plant containing pATGUS expressed GUS transcripts mainly at the tuber, not in stem, with the highest expression level in 5 weeks-grown microtubers. In contrast to pATGUS plants, the transformed plants with pBI121 showed an equal expression pattern throughout the whole developing stages. Consistent with RNA gel blot analysis, histochemical GUS staining and enzyme activity exhibited pATGUS transcripts were at the highest level in 5 weeks cultures. From these results, we suggest that the best stage to analyze the foreign gene introduced by patatin promoter into potato plants is at 5 weeks cultures after tuber formation.
Keywords
CaMV 35S promoter; microtuber; patatin promoter; Solanum tuberosum L. cv Desiree;
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