Role of the iron transporter OsNRAMP1 in cadmium uptake and accumulation in rice

Ryuichi Takahashi, Yasuhiro Ishimaru, Hiromi Nakanishi, Naoko K. Nishizawa

研究成果: Article査読

81 被引用数 (Scopus)

抄録

The heavy metal cadmium (Cd) is toxic to humans, and its accumulation in rice grains is a major agricultural problem. Rice has seven putative metal transporter NRAMP genes, but microarray analysis showed that only OsNRAMP1 is highly upregulated by iron (Fe) deficiency. OsNRAMP1 localized to the plasma membrane and transported Cd as well as Fe. OsNRAMP1 expression was observed mainly in roots and was higher in the roots of a high-Cd-accumulating cultivar (Habataki) than in those of a low-Cd-accumulating cultivar (Sasanishiki). The amino acid sequence of OsNRAMP1 in the Sasanishiki and Habataki cultivars was found to be 100% identical. These results suggest that OsNRAMP1 participates in cellular Cd uptake and that the differences observed in Cd accumulation among cultivars are because of differences in OsNRAMP1 expression levels in roots.

本文言語English
ページ(範囲)1813-1816
ページ数4
ジャーナルPlant Signaling and Behavior
6
11
DOI
出版ステータスPublished - 2011 11
外部発表はい

ASJC Scopus subject areas

  • 植物科学

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