The analysis of magnesium transport system from external solution to xylem in rice root(Plant Nutrition)

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概要

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• We report the characterization of magnesium (Mg) transport from external solution to xylem by using xylem fluid analysis in rice (Oryza sativa L. Nipponbare). It was indicated that Mg uptake and/or xylem loading was mediated by two transport systems, a saturable and a linear component. The K_m value of the saturable component was approximately 20μM, and the saturated concentration was calculated to be 1.5mM. Using a multi-compartment transport box with excised roots, the transfer from external solution to xylem was shown to be inhibited by hexaamminecobalt(III){[Co(III)(NH_3)_6], Co-Hex}, a selective inhibitor of CorA-mediated influx of Mg^<2+>, suggesting that the MRS2/MGT genes that belong to the superfamily of CorA-type membrane proteins are involved in the Mg transport system.

• 一般社団法人日本土壌肥料学会の論文

著者

• Nakanishi Tomoko

  Graduate School Of Agricultural And Life Sciences The University Of Tokyo

• Iwata Naoko

  Graduate School Of Biological Sciences Nara Institute Of Science And Technology

• Saito Takayuki

  Graduate School Of Biosphere Science Hiroshima University

• Kobayashi Natsuko

  Graduate School Of Agricultural And Life Sciences The University Of Tokyo

• TANOI Keitaro

  Biotechnology Research Center, The University of Tokyo

• Tanoi Keitaro

  Biotechnology Research Center The University Of Tokyo:graduate School Of Agricultural And Life Scien

• Saito Takayuki

  Graduate School Of Agricultural And Life Sciences The University Of Tokyo

• Iwata Naoko

  Graduate School Of Agricultural And Life Sciences The University Of Tokyo

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