論文

査読有り
2017年1月

Reducing phosphorus accumulation in rice grains with an impaired transporter in the node

NATURE
  • Naoki Yamaji
  • ,
  • Yuma Takemoto
  • ,
  • Takaaki Miyaji
  • ,
  • Namiki Mitani-Ueno
  • ,
  • Kaoru T. Y. Oshida
  • ,
  • Jian Feng Ma

541
7635
開始ページ
92
終了ページ
+
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/nature20610
出版者・発行元
NATURE PUBLISHING GROUP

Phosphorus is an important nutrient for crop productivity. More than 60% of the total phosphorus in cereal crops is finally allocated into the grains and is therefore removed at harvest. This removal accounts for 85% of the phosphorus fertilizers applied to the field each year(1,2). However, because humans and non-ruminants such as poultry, swine and fish cannot digest phytate, the major form of phosphorus in the grains, the excreted phosphorus causes eutrophication of waterways. A reduction in phosphorus accumulation in the grain would contribute to sustainable and environmentally friendly agriculture. Here we describe a rice transporter, SULTR-like phosphorus distribution transporter (SPDT), that controls the allocation of phosphorus to the grain. SPDT is expressed in the xylem region of both enlarged-and diffuse-vascular bundles of the nodes, and encodes a plasma-membrane-localized transporter for phosphorus. Knockout of this gene in rice (Oryza sativa) altered the distribution of phosphorus, with decreased phosphorus in the grains but increased levels in the leaves. Total phosphorus and phytate in the brown de-husked rice were 20-30% lower in the knockout lines, whereas yield, seed germination and seedling vigour were not affected. These results indicate that SPDT functions in the rice node as a switch to allocate phosphorus preferentially to the grains. This finding provides a potential strategy to reduce the removal of phosphorus from the field and lower the risk of eutrophication of waterways.

リンク情報
DOI
https://doi.org/10.1038/nature20610
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/28002408
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000396119500035&DestApp=WOS_CPL
ID情報
  • DOI : 10.1038/nature20610
  • ISSN : 0028-0836
  • eISSN : 1476-4687
  • PubMed ID : 28002408
  • Web of Science ID : WOS:000396119500035

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