Signaling pathways involved in microbial indoor air pollutant 3-methyl-1-butanol in the induction of stomatal closure in Arabidopsis

Tu Trinh Thi Truong, Chi Chou Chiu, Pei Yu Su, Jing Yu Chen, Tri Phuong Nguyen, Masaru Ohme-Takagi, Ruey Hua Lee, Wan Hsing Cheng, Hao Jen Huang

Research output: Contribution to journalArticlepeer-review

Abstract

Indoor air pollution is a global problem and one of the main stress factors that has negative effects on plant and human health. 3-methyl-1-butanol (3MB), an indoor air pollutant, is a microbial volatile organic compound (mVOC) commonly found in damp indoor dwellings. In this study, we reported that 1 mg/L of 3MB can elicit a significant reduction in the stomatal aperture ratio in Arabidopsis and tobacco. Our results also showed that 3MB enhances the reactive oxygen species (ROS) production in guard cells of wild-type Arabidopsis after 24 h exposure. Further investigation of 24 h 3MB fumigation of rbohD, the1-1, mkk1, mkk3, and nced3 mutants revealed that ROS production, cell wall integrity, MAPK kinases cascade, and phytohormone abscisic acid are all involved in the process of 3MB-induced stomatal. Our findings proposed a mechanism by which 3MB regulates stomatal closure in Arabidopsis. Understanding the mechanisms by which microbial indoor air pollutant induces stomatal closure is critical for modulating the intake of harmful gases from indoor environments into leaves. Investigations into how stomata respond to the indoor mVOC 3MB will shed light on the plant’s “self-defense” system responding to indoor air pollution. Graphical Abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)7556-7568
Number of pages13
JournalEnvironmental Science and Pollution Research
Volume31
Issue number5
DOIs
Publication statusPublished - 2024 Jan

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

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