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자료유형
학술저널
저자정보
저널정보
한국원예학회 HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY Vol.48 No.6
발행연도
2007.12
수록면
341 - 348 (8page)

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The small radish leghemoglobin gene and its mutants were transferred into the genome of tobacco plant through the Agrobacterium-mediated transformation system and examined for possible phenotypic changes through their gene expressions. A 683-bp-long small radish non-symbiotic leghemoglobin gene (nslhb) was isolated and mutated by in vitro mutagenesis. As a result, the distal histidine residue of the nsLHb was substituted to valine, leucine or phenylalanine. These three mutated small radish nslhb genes and non-mutated nslhb genes were transferred into the tobacco plant. A total of 56 regenerated tobacco plants, 14 for each mutant and control, were obtained from inoculated cotyledon explants and PCR amplification was carried out to identify transformants. Based on the Southern blot hybridization, one to three copies of either the nslhb or one of the mutated genes were transferred into the transgenic tobacco nuclear genome. Northern blot analysis confirmed that the nslhb or mutated genes were expressed in some transgenic plants. Segregation ratio in the T₁ and T₂ progenies of all transgenic lines was about 3:1, except valine mutated gene introduced lines showed 2.3:1. Phenotypic characteristics such as plant height, leaf number, leaf length and leaf width of the T₁ progeny showed no significant differences among the transgenic lines, but scored somewhat higher than those of the wild type tobacco plants. The amount of total chlorophyll in leaf of all transgenic plants was slightly higher than that of the wild type tobacco plant, but no difference was detected among the transgenic lines.

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Abstract
Introduction
Materials and Methods
Results
Discussion
Literature Cited

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