Fundamental studies for improving hydrotropic ability of roots and developing water-saving plant culture system
Project/Area Number |
16K07955
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Agricultural environmental engineering/Agricultural information engineering
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Research Institution | Tohoku University |
Principal Investigator |
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Research Collaborator |
Kobayashi Akie
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Project Period (FY) |
2016-04-01 – 2019-03-31
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Project Status |
Completed (Fiscal Year 2018)
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Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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Keywords | 水分屈性 / MIZ1 / 皮層 / オーキシン / 根冠 / シロイヌナズナ / イネ / キュウリ / 重力屈性 / 宇宙実験 / 根 / ミヤコグサ / 生物環境調節 / MIZU-KUSSEI1 (MIZ1) |
Outline of Final Research Achievements |
In this study, we attempted to reveal the molecular function of MIZ1 essential for root hydrotropism and comparatively analyzed the involvement of auxin and the root tip (the cap and meristem) in hydrotropism of different plant species. It was found that in Arabidopsis roots MIZ1 functions at the cortex of elongation zone and that neither the root tip nor auxin transport/redistribution were required for the induction of hydrotropism. Roots of Lotus japonicus also displayed hydrotropism in an auxin-independent manner. On the other hand, auxin transport and redistribution were required for hydrotropic responses of rice, pea and cucumber roots, although it occurred even in the de-tipped roots of rice and cucumber seedlings. These results implied that mechanistic aspect of hydrotropism differs from that of gravitropism and also differs among plant species. We thereby proposed two types of mechanism unique to hydrotropic response in seedling roots.
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Academic Significance and Societal Importance of the Research Achievements |
本研究成果は、新奇の成長制御メカニズムを明らかにし、植物の感覚生物学にブレークスルーをもたらしただけでなく、根の水分屈性制御因子の調節によって、植物の水獲得能・効率的な水利用を大幅に改善できる革新的技術開発への糸口を見出した。すなわち、根の水分屈性を制御するユニークな分子メカニズムとその植物種間差は、地球上の半乾燥地や宇宙空間のような閉鎖生態系における植物工場をも視野に入れた技術開発の基盤となり、砂漠の緑化や耕地拡大と増収、さらには制御環境下における効率的植物生産を確保するための独創的かつ革新的な技術に発展する可能性をもたらした。
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Report
(3 results)
Research Products
(23 results)
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[Journal Article] Root-tip-mediated inhibition of hydrotropism is accompanied with the suppression of asymmetric expression of auxin-inducible genes in response to moisture gradients in cucumber roots2018
Author(s)
Fujii N, Miyabayashi S, Sugita T, Kobayashi A, Yamazaki C, Miyazawa Y, Kamada M, Kasahara H, Osada I, Shimazu T, Fusejima Y, Higashibata A, Yamazaki T, Ishioka N, Takahashi H
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Journal Title
PLOS ONE
Volume: 13
Issue: 1
Pages: 1-25
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Root hydrotropism is controlled via a cortex-specific growth mechanism2017
Author(s)
Dietrich D, Pang L, Kobayashi A, Fozard JA, Boudolf V, Bhosale R, Antoni R, Nguyen T, Hiratsuka S, Fujii N, Miyazawa Y, ---(省略)---Takahashi H, Bennett MJ(計32名)
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Journal Title
Nature Plants
Volume: 3
Issue: 6
Pages: 17057-17057
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Gravitropism interferes with hydrotropism via counteracting auxin dynamics in cucumber roots: clinorotation and spaceflight experiments2017
Author(s)
Morohashi K, Okamoto M, Yamazaki C, Fujii N, Miyazawa Y, Kamada M, Kasahara H, Osada I, Shimazu T, Fusejima Y, Higashibata A, Yamazaki T, Ishioka N, Kobayashi A, Takahashi H
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Journal Title
New Phytologist
Volume: 215
Issue: 4
Pages: 1476-1489
DOI
Related Report
Peer Reviewed
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[Journal Article] The gravity-induced re-localization of auxin efflux carrier CsPIN1 in cucumber seedlings: spaceflight experiments for immunohistochemical microscopy.2016
Author(s)
Yamazaki C, Fujii N, Miyazawa Y, Kamada M, Kasahara H, Osada I, Shimazu T, Fusejima Y, Higashibata A, Yamazaki T, Ishioka N, Takahashi H.
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Journal Title
npj Microgravity
Volume: 2
Issue: 1
Pages: 16030-16030
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Presentation] キュウリの根の重力・水分屈性時の偏差発現遺伝子のオーキシン応答性の解析2017
Author(s)
藤井伸治, 宮林彩智子, 小林啓恵, 山崎千秋, 宮沢豊, 鎌田源司, 笠原春夫, 長田郁子, 嶋津徹, 伏島康男, 東端晃, 山崎丘, 石岡憲昭, 高橋秀幸
Organizer
東北植物学会第7回大会
Related Report
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[Presentation] A Pathway that Laterally Transports Auxin from the Upper Side to the Lower Side of the Transition Zone of Cucumber Seedlings via Endodermal Layers is Formed Due to Gravitstimulation2016
Author(s)
Nobuharu Fujii, Chiaki Yamazaki, Yutaka Miyazawa, Motoshi Kamada, Haruo Kasahara, Ikuko Osada, Toru Shimazu, Yasuo Fusejima, Akira Higashibata, Takashi Yamazaki, Noriaki Ishioka, Hideyuki Takahashi
Organizer
11th Asian Microgravity Symposium
Place of Presentation
北海道大学工学部(北海道、札幌市)
Year and Date
2016-10-25
Related Report
Int'l Joint Research
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