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. 2017 Jun 9;174(4):2289–2301. doi: 10.1104/pp.17.00357

Figure 1.

Figure 1.

Image processing and determination of root tip geometry using Root Scan Tip Analysis (ROSTA) software. A, Area of interest containing a root tip with a pixel edge length of ∼0.01 mm. B, Segmented root tip and contour. C, Refinement of the contour using active fitting. D, Fitting of the ellipse on the refined root tip boundary and determination of root tip radius and length. E, Schematic representation of different force components used to calculate total axial force exerted by the root tip during elongation in soil.