Three-Dimensional Imaging of Plant Organs Using a Simple and Rapid Transparency Technique

Area of Science:

• Plant biology
• Microscopy
• Biotechnology

Background:

• Clearing techniques are essential for microscopic observation, removing light scattering and absorption issues.
• Advanced methods allow detailed fluorescence-based analysis and 3D structural characterization of organs.

Purpose of the Study:

• To introduce a simple, rapid clearing and imaging method for intact plant organs.
• To enable detailed microscopic observation and analysis of internal plant tissues.

Main Methods:

• Developed the Transparent plant Organ MEthod for Imaging (TOMEI) using a 2,2'-thiodiethanol clearing reagent.
• Applied TOMEI to various plant organs (leaves, flower buds, roots) of Arabidopsis thaliana and Oryza sativa.
• Utilized confocal laser scanning microscopy for imaging fluorescent stains and proteins at depths up to 200 µm.

Main Results:

• Transparent plant organs were prepared within 3-6 hours.
• TOMEI enabled visualization of internal structures like vascular tissues and floral organs without sectioning.
• Quantitative analysis of fluorescent proteins and dyes in whole organs, including nematode-induced root-knot development, was achieved.

Conclusions:

• TOMEI is an effective and efficient method for clearing and imaging intact plant organs.
• The technique supports multicolor imaging and 3D structural analysis of plant tissues.
• TOMEI facilitates quantitative analysis of cellular characteristics and molecular events within whole plant organs.