|Title:||Expression level of the sodium transporter gene OsHKT2;1 determines sodium accumulation of rice cultivars under potassium-deficient conditions|
|Author's alias:||落合, 久美子|
|Publisher:||Informa UK Limited|
|Journal title:||Soil Science and Plant Nutrition|
|Abstract:||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.|
|Rights:||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.|
This is not the published version. Please cite only the published version.
|Appears in Collections:||Journal Articles|
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