Nonredundant Regulation of Rice Arbuscular Mycorrhizal Symbiosis by Two Members of the Phosphate Transporter 1 Gene Family

Publication: Research - peer-reviewJournal article – Annual report year: 2012

  • Author: Yang, Shu-Yi

    University of Lausanne, Switzerland

  • Author: Grønlund, Mette

    Ecosystems Programme, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Frederiksborgvej 399, 4000, Roskilde, Denmark

  • Author: Jakobsen, Iver

    Ecosystems Programme, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Frederiksborgvej 399, 4000, Roskilde, Denmark

  • Author: Grotemeyer, Marianne Suter

    University of Bern, Switzerland

  • Author: Rentsch, Doris

    University of Bern, Switzerland

  • Author: Miyao, Akio

    National Institute of Agrobiological Sciences, Japan

  • Author: Hirochika, Hirohiko

    National Institute of Agrobiological Sciences, Japan

  • Author: Kumar, Chellian Santhosh

    University of California, United States

  • Author: Sundaresan, Venkatesan

    University of California, United States

  • Author: Salamin, Nicolas

    University of Lausanne

  • Author: Catausan, Sheryl

    Plant Breeding, Genetics, and Biotechnology Division, International Rice Research Institute, Philippines

  • Author: Mattes, Nicolas

    Plant Breeding, Genetics, and Biotechnology Division, International Rice Research Institute, Philippines

  • Author: Heuer, Sigrid

    Plant Breeding, Genetics, and Biotechnology Division, International Rice Research Institute, Metro, Philippines

  • Author: Paszkowski, Uta

    University of Lausanne, Switzerland

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Pi acquisition of crops via arbuscular mycorrhizal (AM) symbiosis is becoming increasingly important due to limited highgrade
rock Pi reserves and a demand for environmentally sustainable agriculture. Here, we show that 70% of the overall Pi
acquired by rice (Oryza sativa) is delivered via the symbiotic route. To better understand this pathway, we combined genetic,
molecular, and physiological approaches to determine the specific functions of two symbiosis-specific members of the
PHOSPHATE TRANSPORTER1 (PHT1) gene family from rice, ORYsa;PHT1;11 (PT11) and ORYsa;PHT1;13 (PT13). The PT11
lineage of proteins from mono- and dicotyledons is most closely related to homologs from the ancient moss, indicating an
early evolutionary origin. By contrast, PT13 arose in the Poaceae, suggesting that grasses acquired a particular strategy for
the acquisition of symbiotic Pi. Surprisingly, mutations in either PT11 or PT13 affected the development of the symbiosis,
demonstrating that both genes are important for AM symbiosis. For symbiotic Pi uptake, however, only PT11 is necessary and
sufficient. Consequently, our results demonstrate that mycorrhizal rice depends on the AM symbiosis to satisfy its Pi
demands, which is mediated by a single functional Pi transporter, PT11.
Original languageEnglish
JournalPlant Cell
Volume24
Issue number10
Pages (from-to)204236-4251
Number of pages28
ISSN1040-4651
DOIs
StatePublished - 2012
Peer-reviewedYes
CitationsWeb of Science® Times Cited: 36
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