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Tree Cell Biology Lab
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The lab uses microscopy and image analysis to uncover how the cell walls that make up wood are built.
AboutAbout the lab
Uncovering the structure of trees
The Tree Cell Biology Lab clarifies the structure of the cell wall, which underlies a tree's life activity, and the process by which it is formed.
Trees live for hundreds to thousands of years, and their trunks become wood that supports daily life and culture for a long time as buildings and materials.
Using a variety of advanced visualization and analysis methods, the lab also investigates the characteristics of wood as a material in depth, considering why people have used wood.
Undergraduate students join the lab in their fourth year (graduate school: Division of Forest Science, Graduate School of Agriculture).
Key terms
- Lignin
- A component that fills the gaps between cellulose and other components in wood cell walls, making wood hard and strong.
- Reaction wood
- A special wood tissue formed in leaning trunks or branches to restore their posture.
- Immunolabeling
- A method that uses antibodies, which bind only to a specific substance, as markers to make visible where that substance is located in a cell.
ResearchResearch themes
Wood is the cell walls of the cells in the tree trunk. The lab studies the structure of cell walls and how they are formed, using visualization with electron microscopy and antibodies, image information processing, and other methods.
*Illustrative imageReading the "individuality" of wood
The tissue structure of wood preserves traces of each species' way of life, of functional differentiation to suit the environment, and of mechanical optimization. The lab analyzes this individuality using recent information-processing techniques.
*Illustrative imageHow the cells that make wood work
The lab studies how cell wall components are made in organelles and transported to the cell wall, using methods such as high-pressure freezing, which preserves structures close to the living state, and immunolabeling. It also studies the transport of substances needed for heartwood formation.
*Illustrative imageFine structure and composition of the cell wall
The lab analyzes the process by which cellulose, hemicellulose, and lignin assemble in three dimensions. It examines the structure and component distribution of reaction wood cell walls using electron microscopy and antibodies, and considers the role of each component.
MembersFaculty
Members of the Tree Cell Biology Lab consist of faculty and doctoral, master's, and undergraduate students.As of 2026
- ProfessorArata Yoshinaga
- Associate ProfessorTatsuya Awano
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: “Resin Canals” Bweil2 / CC BY-SA 4.0 (cropped)
- Reading the "individuality" of wood: “Wood structure numbers” derivative work: Uvainio (talk) Wood structure multilingual.svg: Thomas Steiner / CC BY-SA 3.0 (cropped)
- How the cells that make wood work: “Plant cell wall diagram-lat” Drawing: LadyofHats Text: Dgava / CC0 (cropped)
- Fine structure and composition of the cell wall: “Druckholz Ast Picea abies” Dr. Michael Rosenthal, Technische Universität Dresden / CC BY-SA 3.0 (cropped)
- Related lab (Forest Ecology Lab): “Smoke-filtered Sun on the Forest Canopy ( )” Forest Service - Northern Region / Public domain (cropped)
- Related lab (Forest Biology Lab): “Sika Deer 30123652” belvedere04 / CC BY 4.0 (cropped)
- Related lab (Tropical Forest Environment Lab): “Palawan Island, Tropical rainforest, Philippines” Vyacheslav Argenberg / CC BY 4.0 (cropped)
- Related lab (Environmental Design Lab): “Japanese garden at Daisen Park in Sakai, October” Laitche / CC BY-SA 4.0 (cropped)
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