^<52>Mn translocation in barley monitored using a positron-emitting tracer imaging system(Plant Nutrition)
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概要
- 論文の詳細を見る
Until now, the real-time uptake and movement of manganese (Mn), an essential plant nutrient, has not been documented in plants. In this study, the real-time translocation of Mn in barley (Hordeum vulgare L. cv. Ehimehadaka no. 1) was visualized using the positron-emitting tracer ^<52>Mn and a positron-emitting tracer imaging system (PETIS). PETIS allowed the non-destructive monitoring of Mn translocation in barley under various conditions. In all cases, ^<52>Mn first accumulated in the discrimination center (DC) at the basal portion of the shoot, suggesting that this region may play an important role in Mn distribution in graminaceous plants. Manganese-deficient barley showed greater translocation of ^<52>Mn from roots to shoots than did Mn-sufficient barley, demonstrating that Mn deficiency causes enhanced Mn uptake and loading into vascular bundles. In contrast, the translocation of ^<52>Mn from roots to shoots was suppressed in Mn-excess barley. In these plants, the uptake of Mn may be suppressed or Mn may accumulate in the intercellular organelles of root cells, resulting in low rates of Mn translocation to shoots. In Mn-sufficient barley, the dark treatment did not suppress the translocation of ^<52>Mn to the youngest leaf, suggesting that the translocation of Mn to the youngest leaf is independent of the transpiration stream. When ^<52>Mn was supplied to the cut end of an expanded leaf, ^<52>Mn was transported to the DC within 27 min and then retranslocated to roots and other leaves. Our results show that the translocation of Mn from the roots to the DC depends passively on water flow, but actively on the Mn transporter(s).
- 社団法人日本土壌肥料学会の論文
著者
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渡邉 聡
東大工:科技団crest
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Watanabe Satoshi
Graduate School Of Science And Technology Chiba University:japan International Research Center For A
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Nishizawa Naoko
Laboratory Of Plant Biotechnology Graduate School Of Agricultural And Life Sciences The University O
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Mori S
Laboratory Of Plant Biotechnology Graduate School Of Agricultural And Life Sciences The University O
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Nakanishi Hiromi
Graduate School of Agricultural and Life Sciences, The University of Tokyo
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Nishizawa Naoko
Graduate School of Agricultural and Life Sciences, The University of Tokyo
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TSUKAMOTO Takashi
Graduate School of Agricultural and Life Sciences, The University of Tokyo
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KIYOMIYA Shoichiro
Graduate School of Agricultural and Life Sciences, The University of Tokyo
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WATANABE Satoshi
Takasaki Advanced Radiation Research Institute, Japan Atomic Energy Agency
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MATSUHASHI Shinpei
Takasaki Advanced Radiation Research Institute, Japan Atomic Energy Agency
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MORI Satoshi
Graduate School of Agricultural and Life Sciences, The University of Tokyo
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Matsuhashi S
Takasaki Advanced Radiation Research Institute Japan Atomic Energy Agency
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Nishizawa Naoko
The University Of Tokyo
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Nishizawa Naoko-kishi
Lab Plant. Mol. Physiol. Tokyo Univ. Fac. Pharmaceutical. Science. Nagoya City Univ.
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Mori S
Dept. Of Appl. Biol. Chem. Univ. Tokyo
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Mori Satoshi
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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Matsuhashi Shinpei
Takasaki Advanced Radiation Research Institute Japan Atomic Energy Agency
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Mori Satoshi
Lab Plant. Mol. Physiol. Tokyo Univ. Fac. Pharmaceutical. Science. Nagoya City Univ.
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Nishizawa N‐k
Univ. Tokyo Tokyo Jpn
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Mori S
Department Of Applied Biological Chemistry The University Of Tokyo
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Nishizawa Naoko
Environmental Science Tohoku University
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Kiyomiya Shoichiro
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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渡邉 聡
Takasaki Advanced Radiation Research Institute Japan Atomic Energy Agency
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Nishizawa Naoko
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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Mori S
Meijo Univ. Aichi Jpn
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Tsukamoto Takashi
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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Nishizawa Naoko-kishi
Laboratory Of Plant Nutrition And Fertilizers Department Of Agricultural Chemistry The University Of
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Nakanishi Hiromi
Graduate School Of Agricultural And Life Sciences University Of Tokyo
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Nishizawa Naoko-kishi
Laboratory Of Plant Molecular Physiology The University Of Tokyo
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NISHIZAWA Naoko
Graduate School of Agricultural and Life Science, University of Tokyo
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MORI Satoshi
Graduate School of Agricultural and Life Science, University of Tokyo
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NAKANISHI Hiromi
Graduate School of Agricultural and Life Science, University of Tokyo
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