<i>Lotus japonicus</i> nodulation is photomorphogenetically controlled by sensing the red/far red (R/FR) ratio through jasmonic acid (JA) signaling

• Akihiro Suzuki

  Department of Agricultural Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, Saga 840-8502, Japan;

• Lalith Suriyagoda

  Department of Agricultural Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, Saga 840-8502, Japan;

• Tamaki Shigeyama

  Department of Agricultural Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, Saga 840-8502, Japan;

• Akiyoshi Tominaga

  Department of Agricultural Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, Saga 840-8502, Japan;

• Masayo Sasaki

  Department of Agricultural Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, Saga 840-8502, Japan;

• Yoshimi Hiratsuka

  Department of Agricultural Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, Saga 840-8502, Japan;

• Aya Yoshinaga

  Department of Agricultural Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, Saga 840-8502, Japan;

• Susumu Arima

  Department of Agricultural Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, Saga 840-8502, Japan;

• Sakae Agarie

  Department of Agricultural Sciences, Faculty of Agriculture, Saga University, Honjyo-machi, Saga, Saga 840-8502, Japan;

• Tatsuya Sakai

  Plant Science Center, Yokohama Institute, RIKEN, Yokohama, Kanagawa 230-0045, Japan;

• Sayaka Inada

  Plant Science Center, Yokohama Institute, RIKEN, Yokohama, Kanagawa 230-0045, Japan;

• Yusuke Jikumaru

  Plant Science Center, Yokohama Institute, RIKEN, Yokohama, Kanagawa 230-0045, Japan;

• Yuji Kamiya

  Plant Science Center, Yokohama Institute, RIKEN, Yokohama, Kanagawa 230-0045, Japan;

• Toshiki Uchiumi

  Department of Chemistry and Bioscience, Faculty of Science, Kagoshima University, Korimoto, Kagoshima 890-0065, Japan;

• Mikiko Abe

  Department of Chemistry and Bioscience, Faculty of Science, Kagoshima University, Korimoto, Kagoshima 890-0065, Japan;

• Masatsugu Hashiguchi

  Frontier Science Research Center, University of Miyazaki, Miyazaki, Miyazaki 889-2192, Japan;

• Ryo Akashi

  Frontier Science Research Center, University of Miyazaki, Miyazaki, Miyazaki 889-2192, Japan;

• Shusei Sato

  Laboratory of Plant Genes, Kazusa DNA Research Institute, Kisarazu, Chiba 292-0812, Japan; and

• Takakazu Kaneko

  Laboratory of Plant Genes, Kazusa DNA Research Institute, Kisarazu, Chiba 292-0812, Japan; and

• Satoshi Tabata

  Laboratory of Plant Genes, Kazusa DNA Research Institute, Kisarazu, Chiba 292-0812, Japan; and

• Ann M. Hirsch

  Department of Molecular, Cell and Developmental Biology and Molecular Biology Institute, University of California, Los Angeles, CA 90095-1606

抄録

Light is critical for supplying carbon to the energetically expensive, nitrogen-fixing symbiosis between legumes and rhizobia. Here, we show that phytochrome B (phyB) is part of the monitoring system to detect suboptimal light conditions, which normally suppress Lotus japonicus nodule development after Mesorhizobium loti inoculation. We found that the number of nodules produced by L. japonicus phyB mutants is significantly reduced compared with the number produced of WT Miyakojima MG20. To explore causes other than photoassimilate production, the possibility that local control by the root genotype occurred was investigated by grafting experiments. The results showed that the shoot and not the root genotype is responsible for root nodule formation. To explore systemic control mechanisms exclusive of photoassimilation, we moved WT MG20 plants from white light to conditions that differed in their ratios of low or high red/far red (R/FR) light. In low R/FR light, the number of MG20 root nodules dramatically decreased compared with plants grown in high R/FR, although photoassimilate content was higher for plants grown under low R/FR. Also, the expression of jasmonic acid (JA) -responsive genes decreased in both low R/FR light-grown WT and white light-grown phyB mutant plants, and it correlated with decreased jasmonoyl-isoleucine content in the phyB mutant. Moreover, both infection thread formation and root nodule formation were positively influenced by JA treatment of WT plants grown in low R/FR light and white light-grown phyB mutants. Together, these results indicate that root nodule formation is photomorphogenetically controlled by sensing the R/FR ratio through JA signaling.

収録刊行物

• Proceedings of the National Academy of Sciences

  Proceedings of the National Academy of Sciences 108 (40), 16837-16842, 2011-09-19

  Proceedings of the National Academy of Sciences

キーワード

• Multidisciplinary

詳細情報

• CRID: 1360565167084901248
• NII論文ID: 80022031074
• DOI: 10.1073/pnas.1105892108
• ISSN: 10916490
• ISSN: 00278424
• Web Site: https://pnas.org/doi/pdf/10.1073/pnas.1105892108
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