New approaches to the biology of stomatal guard cells

Juntaro Negi, Mimi Hashimoto-Sugimoto, Kensuke Kusumi, Koh Iba

研究成果: Contribution to journalReview article査読

42 被引用数 (Scopus)


CO2 acts as an environmental signal that regulates stomatal movements. High CO2 concentrations reduce stomatal aperture, whereas low concentrations trigger stomatal opening. In contrast to our advanced understanding of light and drought stress responses in guard cells, the molecular mechanisms underlying stomatal CO2 sensing and signaling are largely unknown. Leaf temperature provides a convenient indicator of transpiration, and can be used to detect mutants with altered stomatal control. To identify genes that function in CO2 responses in guard cells, CO2-insensitive mutants were isolated through high-throughput leaf thermal imaging. The isolated mutants are categorized into three groups according to their phenotypes: (i) impaired in stomatal opening under low CO2 concentrations; (ii) impaired in stomatal closing under high CO2 concentrations; and (iii) impaired in stomatal development. Characterization of these mutants has begun to yield insights into the mechanisms of stomatal CO2 responses. In this review, we summarize the current status of the field and discuss future prospects.

ジャーナルPlant and Cell Physiology
出版ステータス出版済み - 2 2014

All Science Journal Classification (ASJC) codes

  • 生理学
  • 植物科学
  • 細胞生物学


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