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タイトル: | Expression level of the sodium transporter gene OsHKT2;1 determines sodium accumulation of rice cultivars under potassium-deficient conditions |
著者: | Miyamoto, Takuji Ochiai, Kumiko Nonoue, Yasunori Matsubara, Kazuki Yano, Masahiro Matoh, Toru |
著者名の別形: | 落合, 久美子 |
キーワード: | map-based cloning Oryza sativa OsHKT2;1 potassium sodium |
発行日: | 2015 |
出版者: | Informa UK Limited |
誌名: | Soil Science and Plant Nutrition |
巻: | 61 |
号: | 3 |
開始ページ: | 481 |
終了ページ: | 492 |
抄録: | Under potassium (K)-deficient conditions, rice (Oryza sativa L.) actively takes up and utilizes sodium (Na) as an alternative element to K. In this study, we cloned a gene responsible for cultivar differences in shoot Na accumulation using a map-based cloning method. The responsible gene OsHKT2;1 encodes an Na transporter associated with Na uptake in root tissues, and its expression level was positively correlated with Na uptake potential in 11 rice cultivars. We found that OsHKT2;1 overexpression promoted shoot Na accumulation under low K supply and proposed that OsHKT2;1 expression level is a key factor in the Na accumulation potential in rice cultivars. However, under sufficient K supply, OsHKT2;1-overexpressing rice plants accumulated Na in roots but not in shoots. This result suggests that Na transfer from root to shoot may be regulated by another Na transporter. |
著作権等: | This is an Accepted Manuscript of an article published by Taylor & Francis in Soil Science and Plant Nutrition on 5 February 2015, available online: http://www.tandfonline.com/10.1080/00380768.2015.1005539. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/252782 |
DOI(出版社版): | 10.1080/00380768.2015.1005539 |
出現コレクション: | 学術雑誌掲載論文等 |
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