Constitutive Expression of a Novel-Type Ammonium Transporter OsAMT2 in Rice Plants | Zendy

Arata Suenaga | Zendy; Kanami Moriya | Zendy; Yutaka Sonoda | Zendy; Akira Ikeda | Zendy; Nicolaus von Wirén | Zendy; Toshihiko Hayakawa | Zendy; Junji Yamaguchi | Zendy; Tomoyuki Yamaya | Zendy

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Constitutive Expression of a Novel-Type Ammonium Transporter OsAMT2 in Rice Plants

Author(s) -

Arata Suenaga,

Kanami Moriya,

Yutaka Sonoda,

Akira Ikeda,

Nicolaus von Wirén,

Toshihiko Hayakawa,

Junji Yamaguchi,

Tomoyuki Yamaya

Publication year - 2003

Publication title -

plant and cell physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.975

H-Index - 152

eISSN - 1471-9053

pISSN - 0032-0781

DOI - 10.1093/pcp/pcg017

Subject(s) - ammonium , transporter , yeast , gene , mutant , homology (biology) , biochemistry , gene expression , wild type , biology , chemistry , shoot , botany , organic chemistry

To characterize ammonium transport pathways in rice, two cDNAs with high homology to MEP/AMT2-type ammonium transporters, OsAMT2;1 and OsAMT3;1, were isolated. Expression of OsAMT2;1 in an ammonium-uptake-defective yeast mutant showed that this gene encodes functional ammonium transporters. OsAMT2;1 was constitutively expressed in both roots and shoots irrespective of the supply of inorganic nitrogen to the medium, whereas OsAMT3;1 expression was relatively weak. A database search with the amino acid sequence of OsAMT2;1 showed that there are 10 putative OsAMT genes in rice, i.e. three each for OsAMT1, OsAMT2 and OsAMT3, respectively, and one for OsAMT4.

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