Ethanol-Mediated Novel Survival Strategy against Drought Stress in Plants

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  • Khurram Bashir
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Daisuke Todaka
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Sultana Rasheed
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Akihiro Matsui
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Zarnab Ahmad
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Kaori Sako
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Yoshinori Utsumi
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Anh Thu Vu
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Maho Tanaka
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Satoshi Takahashi
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Junko Ishida
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Yuuri Tsuboi
    Environmental Metabolic Analysis Research Team, RIKEN Center for Sustainable Resource Science , 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Shunsuke Watanabe
    Dormancy and Adaptation Research Unit, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku , Yokohama, Kanagawa, 230-0045, Japan
  • Yuri Kanno
    Dormancy and Adaptation Research Unit, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku , Yokohama, Kanagawa, 230-0045, Japan
  • Eigo Ando
    Division of Biological Sciences, Graduate School of Science, Nagoya University , Chikusa, Nagoya, 464-8602 Japan
  • Kwang-Chul Shin
    Division of Biological Sciences, Graduate School of Science, Nagoya University , Chikusa, Nagoya, 464-8602 Japan
  • Makoto Seito
    Kihara Institute for Biological Research, Yokohama City University , 641-12 Maiokacho, Totsuka Ward, Yokohama, Kanagawa, 244-0813 Japan
  • Hinata Motegi
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Muneo Sato
    Mass Spectrometry and Microscopy Unit, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku , Yokohama, Kanagawa, 230-0045 Japan
  • Rui Li
    Metabolic Systems Research Team, RIKEN Center for Sustainable Resource Science , 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Saya Kikuchi
    Gene Discovery Research Group, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Miki Fujita
    Mass Spectrometry and Microscopy Unit, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku , Yokohama, Kanagawa, 230-0045 Japan
  • Miyako Kusano
    Metabolomics Research Group, RIKEN Center for Sustainable Resource Science , 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045 Japan
  • Makoto Kobayashi
    Metabolomics Research Group, RIKEN Center for Sustainable Resource Science , 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045 Japan
  • Yoshiki Habu
    Graduate School of Life and Environmental Science, University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8572 Japan
  • Atsushi J Nagano
    Faculty of Agriculture, Ryukoku University, Yokotani 1-5, Seta Oe-cho , Otsu, Shiga, 520-2914, Japan
  • Kanako Kawaura
    Kihara Institute for Biological Research, Yokohama City University , 641-12 Maiokacho, Totsuka Ward, Yokohama, Kanagawa, 244-0813 Japan
  • Jun Kikuchi
    Environmental Metabolic Analysis Research Team, RIKEN Center for Sustainable Resource Science , 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Kazuki Saito
    Metabolomics Research Group, RIKEN Center for Sustainable Resource Science , 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045 Japan
  • Masami Yokota Hirai
    Mass Spectrometry and Microscopy Unit, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku , Yokohama, Kanagawa, 230-0045 Japan
  • Mitsunori Seo
    Dormancy and Adaptation Research Unit, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku , Yokohama, Kanagawa, 230-0045, Japan
  • Kazuo Shinozaki
    Gene Discovery Research Group, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan
  • Toshinori Kinoshita
    Division of Biological Sciences, Graduate School of Science, Nagoya University , Chikusa, Nagoya, 464-8602 Japan
  • Motoaki Seki
    Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama, Kanagawa, 230-0045 Japan

抄録

<jats:title>Abstract</jats:title> <jats:p>Water scarcity is a serious agricultural problem causing significant losses to crop yield and product quality. The development of technologies to mitigate the damage caused by drought stress is essential for ensuring a sustainable food supply for the increasing global population. We herein report that the exogenous application of ethanol, an inexpensive and environmentally friendly chemical, significantly enhances drought tolerance in Arabidopsis thaliana, rice and wheat. The transcriptomic analyses of ethanol-treated plants revealed the upregulation of genes related to sucrose and starch metabolism, phenylpropanoids and glucosinolate biosynthesis, while metabolomic analysis showed an increased accumulation of sugars, glucosinolates and drought-tolerance-related amino acids. The phenotyping analysis indicated that drought-induced water loss was delayed in the ethanol-treated plants. Furthermore, ethanol treatment induced stomatal closure, resulting in decreased transpiration rate and increased leaf water contents under drought stress conditions. The ethanol treatment did not enhance drought tolerance in the mutant of ABI1, a negative regulator of abscisic acid (ABA) signaling in Arabidopsis, indicating that ABA signaling contributes to ethanol-mediated drought tolerance. The nuclear magnetic resonance analysis using 13C-labeled ethanol indicated that gluconeogenesis is involved in the accumulation of sugars. The ethanol treatment did not enhance the drought tolerance in the aldehyde dehydrogenase (aldh) triple mutant (aldh2b4/aldh2b7/aldh2c4). These results show that ABA signaling and acetic acid biosynthesis are involved in ethanol-mediated drought tolerance and that chemical priming through ethanol application regulates sugar accumulation and gluconeogenesis, leading to enhanced drought tolerance and sustained plant growth. These findings highlight a new survival strategy for increasing crop production under water-limited conditions.</jats:p>

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