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Laser ablation tomography for visualization of root colonization by edaphic organisms
Christopher F Strock1, Hannah M Schneider1, Tania Galindo-Castañeda1
1Department of Plant Science, Pennsylvania State University, University Park, PA, USA.
Journal of Experimental Botany
|June 15, 2019
Summary
Laser ablation tomography (LAT) offers a new way to study soil organisms and plant roots. This 3D imaging technique quantifies root anatomy and interactions with fungi, insects, and nematodes.
Area of Science:
- Plant Science
- Microbiology
- Entomology
- Nematology
Background:
- Soil biota significantly impact crop productivity.
- Studying in situ root-organism interactions is challenging.
- Novel imaging techniques are needed to understand these complex relationships.
Purpose of the Study:
- To introduce and validate Laser Ablation Tomography (LAT) for analyzing root anatomy and interactions with soil organisms.
- To demonstrate LAT's capability in quantifying root colonization, damage, and anatomical changes.
Main Methods:
- Laser Ablation Tomography (LAT) was employed for 3D imaging of plant roots.
- UV excitation and autofluorescence were used to differentiate tissues and identify organismal effects.
- Quantitative analysis of fungal colonization, herbivore damage, and pathogen-induced tissue changes was performed.
Main Results:
- LAT enabled rapid, 3D quantitative and qualitative analysis of root anatomy.
- Differential autofluorescence distinguished healthy, colonized, and damaged root tissues.
- The method allowed precise quantification of fungal colonization, insect herbivory, nematode parasitism, and Fusarium damage.
Conclusions:
- LAT is a powerful tool for high-throughput screening of root anatomy and its genetic control.
- This technology enhances the interpretation of root-organism interactions in opaque root segments.
- LAT opens new avenues for research on the role of root phenotypes in associations with soil biota.
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