2017年5月
Low-cesium rice: mutation in OsSOS2 reduces radiocesium in rice grains
SCIENTIFIC REPORTS
- 巻
- 7
- 号
- 1
- 開始ページ
- 2432
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/s41598-017-02243-9
- 出版者・発行元
- NATURE PUBLISHING GROUP
In Japan, radiocesium contamination in foods has become of great concern and it is a primary issue to reduce grain radiocesium concentration in rice (Oryza sativa L.). Here, we report a low-cesium rice mutant 1 (lcs1) with the radiocesium concentration in grain about half that in the wild-type cultivar. Genetic analyses revealed that a mutation in OsSOS2, which encodes a serine/threonine-protein kinase required for the salt overly sensitive (SOS) pathway in plants, is responsible for the decreased cesium (Cs) concentrations in lcs1. Physiological analyses showed that Cs+ uptake by lcs1 roots was significantly decreased under low-potassium (K+) conditions in the presence of sodium (Na+) (low K+/ Na+). The transcript levels of several K+ and Na+ transporter genes, such as OsHAK1, OsHAK5, OsAKT1, and OsHKT2; 1 were significantly down-regulated in lcs1 grown at low K+/ Na+. The decreased Cs+ uptake in lcs1 might be closely related to the lower expression of these genes due to the K+/ Na+ imbalance in the lcs1 roots caused by the OsSOS2 mutation. Since the lcs1 plant had no significant negative effects on agronomic traits when grown in radiocesium-contaminated paddy fields, this mutant could be used directly in agriculture for reducing radiocesium in rice grains.
- リンク情報
- ID情報
-
- DOI : 10.1038/s41598-017-02243-9
- ISSN : 2045-2322
- PubMed ID : 28546542
- Web of Science ID : WOS:000401962500036