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Kinoshita Lab
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A research lab that uses stomata as a model to investigate how plants respond to their environment.
AboutAbout the lab
Decoding plant environmental responses through stomata
The Kinoshita Lab studies how plants respond to environmental changes and grow.
Using the stomata in the plant epidermis as a model system for environmental responses, the lab aims to clarify the mechanisms of signal transduction.
The lab investigates how stomata open and close in response to blue light, CO2, and drought stress, using physiological, biochemical, and genetic methods.
The lab also belongs to the Institute of Transformative Bio-Molecules (ITbM) and pursues research from a chemical biology perspective.
Key terms
- Stomata
- Pores in the plant epidermis. They open and close to regulate gas exchange between the plant and the atmosphere, including CO2 uptake, transpiration, and oxygen release.
- Guard cells
- The cells that form a stoma. Rising CO2 concentrations are recognized by sensor molecules inside these cells.
- Phototropin
- A blue light receptor unique to plants. It acts as the photoreceptor for stomatal opening.
NewsLab news
View More ↗ResearchResearch themes
Plants grow in response to changes in their environment. This lab uses stomata as a model system for environmental responses and seeks to clarify the mechanisms of signal transduction in plants.
*Illustrative imageLight signals that drive stomatal opening
The lab has shown that the signal received by the blue light receptor phototropin activates the plasma membrane H+-ATPase, which creates the driving force for stomatal opening. Using guard cells, it is now working to elucidate the full signal transduction pathway that controls stomatal aperture.
*Illustrative imageResponses to water stress and CO2
Stomatal closure in response to high CO2 is thought to be important for improving plant water use efficiency. The lab uses biochemistry, genetics, and cell biology to study how sensor molecules in guard cells recognize rising CO2 concentrations and trigger stomatal closure.
MembersFaculty
- ProfessorToshinori Kinoshita
- Project Associate ProfessorYohei Takahashi
- Assistant ProfessorYuki Hayashi
- Assistant ProfessorEigo Ando
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Tomato leaf stomate 1-color” Photohound / Public domain (cropped)
- Light signals that drive stomatal opening: “Guard cells signals” June Kwak, Pascal Mäser / Public domain (cropped)
- Responses to water stress and CO2: “Guard cells surrounding closed stoma in epidermis of succulent xerophyte leaf ( )” Berkshire Community College Bioscience Image Library / CC0 (cropped)
- Related lab (土屋グループ): “Striga hermonthica 1148108” USDA APHIS PPQ - Oxford, North Carolina , USDA APHIS PPQ, Bugwood.org / CC BY 3.0 us (cropped)
- Related lab (栗原グループ): “Plant cell - ben” Benjaminphanijchanont / CC BY 4.0 (cropped)
- Related lab (八木グループ): “Prentice Hall Molecular Model Set for General Organic Chemistry 8141” Bin im Garten / CC BY-SA 3.0 (cropped)
- Related lab (吉村グループ): “Three pink cherry blossoms in Tuntorp” W.carter / CC BY 4.0 (cropped)
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