Low-cesium rice: mutation in OsSOS2 reduces radiocesium in rice grains

Abstract 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-t...

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Autores principales:	Satoru Ishikawa, Shimpei Hayashi, Tadashi Abe, Masato Igura, Masato Kuramata, Hachidai Tanikawa, Manaka Iino, Takashi Saito, Yuji Ono, Tetsuya Ishikawa, Shigeto Fujimura, Akitoshi Goto, Hiroki Takagi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/44c9bb21c1f84f17ac0214498eb5e24d
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spelling	oai:doaj.org-article:44c9bb21c1f84f17ac0214498eb5e24d2021-12-02T16:08:23ZLow-cesium rice: mutation in OsSOS2 reduces radiocesium in rice grains10.1038/s41598-017-02243-92045-2322https://doaj.org/article/44c9bb21c1f84f17ac0214498eb5e24d2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02243-9https://doaj.org/toc/2045-2322Abstract 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.Satoru IshikawaShimpei HayashiTadashi AbeMasato IguraMasato KuramataHachidai TanikawaManaka IinoTakashi SaitoYuji OnoTetsuya IshikawaShigeto FujimuraAkitoshi GotoHiroki TakagiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-15 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Satoru Ishikawa Shimpei Hayashi Tadashi Abe Masato Igura Masato Kuramata Hachidai Tanikawa Manaka Iino Takashi Saito Yuji Ono Tetsuya Ishikawa Shigeto Fujimura Akitoshi Goto Hiroki Takagi Low-cesium rice: mutation in OsSOS2 reduces radiocesium in rice grains
description	Abstract 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.
format	article
author	Satoru Ishikawa Shimpei Hayashi Tadashi Abe Masato Igura Masato Kuramata Hachidai Tanikawa Manaka Iino Takashi Saito Yuji Ono Tetsuya Ishikawa Shigeto Fujimura Akitoshi Goto Hiroki Takagi
author_facet	Satoru Ishikawa Shimpei Hayashi Tadashi Abe Masato Igura Masato Kuramata Hachidai Tanikawa Manaka Iino Takashi Saito Yuji Ono Tetsuya Ishikawa Shigeto Fujimura Akitoshi Goto Hiroki Takagi
author_sort	Satoru Ishikawa
title	Low-cesium rice: mutation in OsSOS2 reduces radiocesium in rice grains
title_short	Low-cesium rice: mutation in OsSOS2 reduces radiocesium in rice grains
title_full	Low-cesium rice: mutation in OsSOS2 reduces radiocesium in rice grains
title_fullStr	Low-cesium rice: mutation in OsSOS2 reduces radiocesium in rice grains
title_full_unstemmed	Low-cesium rice: mutation in OsSOS2 reduces radiocesium in rice grains
title_sort	low-cesium rice: mutation in ossos2 reduces radiocesium in rice grains
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/44c9bb21c1f84f17ac0214498eb5e24d
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Low-cesium rice: mutation in OsSOS2 reduces radiocesium in rice grains

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