Conferring high‐temperature tolerance to nontransgenic tomato scions using graft transmission of RNA silencing of the fatty acid desaturase gene |
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Authors: | Shinya Nakamura Kana Hondo Tomoko Kawara Yozo Okazaki Kazuki Saito Kappei Kobayashi Takashi Yaeno Naoto Yamaoka Masamichi Nishiguchi |
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Institution: | 1. Faculty of Agriculture, Ehime University, Matsuyama, Japan;2. Berg Earth Inc, Uwajima, Japan;3. Metabolomics Research Group, RIKEN Center for Sustainable Resource Science, Yokohama, Japan;4. Graduate School of Pharmaceutical Sciences, Chiba University, Inage‐ku, Japan |
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Abstract: | We investigated graft transmission of high‐temperature tolerance in tomato scions to nontransgenic scions from transgenic rootstocks, where the fatty acid desaturase gene (LeFAD7) was RNA‐silenced. Tomato was transformed with a plasmid carrying an inverted repeat of LeFAD7 by Agrobacterium. Several transgenic lines showed the lower amounts of LeFAD7 RNA and unsaturated fatty acids, while nontransgenic control did not, and siRNA was detected in the transgenic lines, but not in control. These lines grew under conditions of high temperature, while nontransgenic control did not. Further, the nontransgenic plants were grafted onto the silenced transgenic plants. The scions showed less of the target gene RNA, and siRNA was detected. Under high‐temperature conditions, these grafted plants grew, while control grafted plants did not. Thus, it was shown that high‐temperature tolerance was conferred in the nontransgenic scions after grafting onto the silenced rootstocks. |
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Keywords: | tomato fatty acid desaturase
LeFAD7
RNA silencing high‐temperature tolerance graft transmission |
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