The accumulation of recombinant miraculin is independent of fruit size in tomato
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- Ono Azusa
- Graduate School of Life and Environmental Sciences, University of Tsukuba
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- Hiwasa-Tanase Kyoko
- Faculty of Life and Environmental Sciences, University of Tsukuba Tsukuba-Plant Innovation Research Center, University of Tsukuba
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- Nonaka Satoko
- Faculty of Life and Environmental Sciences, University of Tsukuba Tsukuba-Plant Innovation Research Center, University of Tsukuba
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- Ezura Hiroshi
- Faculty of Life and Environmental Sciences, University of Tsukuba Tsukuba-Plant Innovation Research Center, University of Tsukuba
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<p>The taste-modifying protein miraculin (MIR) has received increasing interest as a new low-calorie sweetener. In our previous study using the tomato variety ‘Micro-Tom,’ it was shown that in transgenic tomatoes in which MIR was expressed by using the cauliflower mosaic virus 35S promoter (p35S) and a heat shock protein terminator (tHSP) cassette (p35S-MIR-tHSP), higher levels of miraculin accumulated than when MIR was driven by the nopaline synthase terminator (tNOS) cassette (p35S-MIR-tNOS). ‘Micro-Tom’ is a dwarf tomato used for research and shows a low yield. To achieve high productivity of MIR, it is essential to improve the MIR accumulation potential by using high-yielding cultivars. In this study, we evaluate whether the high MIR accumulation trait mediated by the tHSP appears even when fruit size increases. A line in which the p35S-MIR-tHSP cassette was introduced into a high-yielding variety was bred by backcrossing. The line homozygous for MIR showed higher accumulation of MIR than the heterozygous line. Despite large differences in fruit size, the MIR level in the backcross line was similar to that in the p35S-MIR-tHSP line (background ‘Micro-Tom’). It was approximately 3.1 times and 4.0 times higher than those in miracle fruits and the p35S-MIR-tNOS tomato line 5B (‘Moneymaker’ background, which exhibits the highest miraculin productivity achieved thus far), respectively. These results demonstrate that the high MIR accumulation trait mediated by the tHSP appears even when fruit size is increased.</p>
収録刊行物
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- Plant Biotechnology
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Plant Biotechnology 38 (1), 161-165, 2021-03-25
日本植物バイオテクノロジー学会
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詳細情報 詳細情報について
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- CRID
- 1390568937775993344
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- NII論文ID
- 130008002877
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- NII書誌ID
- AA11250821
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- ISSN
- 13476114
- 13424580
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- NDL書誌ID
- 031463346
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可