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Study on the role of apoplastic barrier at the root exodermis in waterlogging avoidance

Research Project

Project/Area Number 17K15211
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Science in genetics and breeding
Research InstitutionFukui Prefectural University

Principal Investigator

SHIONO Katsuhiro  福井県立大学, 生物資源学部, 准教授 (20610695)

Research Collaborator ENDO Nobuyuki  
SUZUKI Kohtaku  
Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsアポプラストバリア / イオノーム / 湿害 / カスパリー線 / スベリン / 外皮
Outline of Final Research Achievements

In wetland plant including rice, apoplastic barrier at the root exodermis is considered to block an influx of toxic reduced iron for survival under waterlogging. However, it is not known that which reduced irons cause fatal toxicity under waterlogging. Here, we evaluated which reduced irons accumulated in a rice mutant, reduced culm number1 (rcn1), defected exodermal apoplastic barrier under waterlogged conditions. We found hyper accumulation of sodium and iron in rcn1 mutant rather than in wild type. RCN1 over expressed rice (35S::RCN1/OsABCG5) did not introduce strong apoplastic barrier at the exodermis, thus we could not test whether exodermal barrier contribute hyper accumulation of sodium and iron in over expressed lines. Our study suggests that exodermal apoplastic barrier inhibit sodium and iron infiltration under waterlogged conditions.

Academic Significance and Societal Importance of the Research Achievements

根は水や養分(元素)を吸収する重要な器官である。表皮から維管束に至る水と元素が通過する経路では内側(内皮)と外側(外皮)にカスパリー線とスベリン層が形成され、細胞外空間(アポプラスト)を通過する物質移動を抑制している。外皮は根の最外層に位置するため、その物質選択機能は養水分吸収や不良環境への適応に重要と考えられている。外皮形成能力を欠いたイネ変異体の解析から、過湿ストレスの回避にNa、K、Feの過剰吸収を防ぐことが重要である可能性が示唆された。本研究では過湿ストレス下での外皮のアポプラストバリアの機能について新しい知見を付加することができた。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2019 2018 2017 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (5 results) (of which Invited: 1 results) Remarks (2 results)

  • [Journal Article] Improved waterlogging tolerance of barley (Hordeum vulgare) by pretreatment with ethephon2019

    • Author(s)
      Shiono Katsuhiro、Ejiri Masato、Shimizu Kana、Yamada Sumiyo
    • Journal Title

      Plant Production Science

      Volume: 22 Issue: 2 Pages: 285-295

    • DOI

      10.1080/1343943x.2019.1581579

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Prevention of Radial Oxygen Loss Is Associated With Exodermal Suberin Along Adventitious Roots of Annual Wild Species of Echinochloa2019

    • Author(s)
      Ejiri Masato、Shiono Katsuhiro
    • Journal Title

      Frontiers in Plant Science

      Volume: 10

    • DOI

      10.3389/fpls.2019.00254

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] イネの外皮形成力の有無は塩ストレス耐性に影響するのか?2018

    • Author(s)
      安藤希珠名, 塩野克宏
    • Organizer
      第48回根研究集会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 外生ABAがオオムギの下皮に機能的なアポプラストバリアを形成させる2017

    • Author(s)
      塩野克宏,松浦晴香,山田淑葉,Timothy D. Colmer
    • Organizer
      第46回根研究学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 東アジアに分布するヒエ属(2種3変種)における耐湿性の比較2017

    • Author(s)
      江尻真斗, 塩野克宏
    • Organizer
      第46回根研究学会
    • Related Report
      2017 Research-status Report
  • [Presentation] ヒエ属雑草とイネにおける ROL(酸素放出) バリア形成機能の比較2017

    • Author(s)
      江尻真斗, 塩野克宏
    • Organizer
      日本育種学会第132回講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] イネの耐湿性に関与する根の酸素通気システムの研究2017

    • Author(s)
      塩野克宏
    • Organizer
      第47回根研究集会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Remarks] 植物環境学分野HP

    • URL

      http://www.s.fpu.ac.jp/kankyo/Home/index.html

    • Related Report
      2018 Annual Research Report
  • [Remarks] 研究室HP

    • URL

      http://www.s.fpu.ac.jp/kankyo/Home/index.html

    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2020-03-30  

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