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LeafJ: An ImageJ Plugin for Semi-automated Leaf Shape Measurement

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Quantifying Shape Changes and Tissue Deformation in Leaf Development.

Anne-Gaëlle Rolland-Lagan¹, Lauren Remmler², Camille Girard-Bock²

¹Department of Biology (A.-G.R.-L., L.R., C.G.-B.) andSchool of Electrical Engineering and Computer Science (A.-G.R.-L.), University of Ottawa, Ottawa, Ontario, Canada K1N 6N5 (A.-G.R.-L.) arolland@uottawa.ca.

Plant Physiology

|April 9, 2014

Summary

Researchers developed computational tools to quantify tissue deformation and shape changes during plant leaf development. This analysis revealed upward radial deformation in early stages, explaining how Arabidopsis leaves maintain shape despite growth variations.

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Area of Science:

Developmental biology
Plant morphology
Computational biology

Background:

Quantifying biological shapes is crucial in biology, but existing methods lack insight into shape generation mechanisms.
Growth patterns offer clues to morphogenesis but are complex and difficult to link directly to final shape.
Understanding the interplay between growth and shape is essential for organ development studies.

Purpose of the Study:

To present computational tools for quantifying tissue deformation and surface shape changes during leaf development.
To analyze the developmental stages of the first leaf of Arabidopsis (Arabidopsis thaliana).
To investigate the mechanisms underlying leaf shape determination and maintenance.

Main Methods:

Development of computational tools for analyzing tissue deformation.
Application of these tools to quantify surface shape changes in Arabidopsis leaves over time.
Analysis of leaf development from early time points through later stages.

Main Results:

The overall shape of the Arabidopsis leaf remained relatively constant during the analyzed developmental stages.
Significant upward radial tissue deformation was observed in early developmental time points.
This deformation pattern provides a potential explanation for shape maintenance despite heterogeneous growth.

Conclusions:

Quantifying tissue deformation is critical for understanding the control of organ shape, particularly in plants.
Experimental mapping of deformation patterns can elucidate the link between growth processes and resulting organ shapes.
The findings offer new insights into the morphogenetic processes governing leaf development in Arabidopsis.