Host plant genome overcomes the lack of a bacterial gene for symbiotic nitrogen fixation

Tsuneo Hakoyama, Kaori Niimi, Hirokazu Watanabe, Ryohei Tabata, Junichi Matsubara, Shusei Sato, Yasukazu Nakamura, Satoshi Tabata, Li Jichun, Tsuyoshi Matsumoto, Kazuyuki Tatsumi, Mika Nomura, Shigeyuki Tajima, Masumi Ishizaka, Koji Yano, Haruko Imaizumi-Anraku, Masayoshi Kawaguchi, Hiroshi Kouchi and Norio Suganuma ()
Additional contact information
Tsuneo Hakoyama: National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, Japan
Kaori Niimi: Aichi University of Education, Kariya, Aichi 448-8542, Japan
Hirokazu Watanabe: Aichi University of Education, Kariya, Aichi 448-8542, Japan
Ryohei Tabata: Aichi University of Education, Kariya, Aichi 448-8542, Japan
Junichi Matsubara: Aichi University of Education, Kariya, Aichi 448-8542, Japan
Shusei Sato: Kazusa DNA Research Institute, Kisarazu, Chiba 292-0812, Japan
Yasukazu Nakamura: Kazusa DNA Research Institute, Kisarazu, Chiba 292-0812, Japan
Satoshi Tabata: Kazusa DNA Research Institute, Kisarazu, Chiba 292-0812, Japan
Li Jichun: Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
Tsuyoshi Matsumoto: Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
Kazuyuki Tatsumi: Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
Mika Nomura: Faculty of Agriculture, Kagawa University, Kita, Kagawa 761-0795, Japan
Shigeyuki Tajima: Faculty of Agriculture, Kagawa University, Kita, Kagawa 761-0795, Japan
Masumi Ishizaka: National Institute of Agro-Environmental Sciences, Tsukuba, Ibaraki 305-8604, Japan
Koji Yano: National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, Japan
Haruko Imaizumi-Anraku: National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, Japan
Masayoshi Kawaguchi: National Institute for Basic Biology, Okazaki, Aichi 444-8585, Japan
Hiroshi Kouchi: National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, Japan
Norio Suganuma: Aichi University of Education, Kariya, Aichi 448-8542, Japan

Nature, 2009, vol. 462, issue 7272, 514-517

Abstract: In it together Legume plants form a symbiotic relationship with nitrogen-fixing bacteria of the Rhizobiaceae family that can reduce atmospheric nitrogen into ammonia. Homocitrate is an essential component of the enzyme nitrogenase, which is required for nitrogen fixation, but the NifV gene for homocitrate synthase is not present in most Rhizobium species. Now Hakoyama et al. identify a gene, called FEN1, expressed in the root nodules of the model legume, Lotus japonicas, that encodes for homocitrate synthase. Thus homocitrate from the host plant is essential for nitrogen fixation by rhizobia, highlighting the interdependence of the co-evolving symbiotic partners.

Date: 2009
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DOI: 10.1038/nature08594

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