Abstract
Soil compaction and escalating global drought increase soil strength and stiffness. It remains unclear which plant root biomechanical mechanisms/traits enable growth in these harsh conditions. Here, we combine synchrotron X-ray computed tomography with spatially resolved X-ray diffraction to characterize the biomechanics of a replica root-soil system. We map the strain field around the root tip analog, finding strong agreement with finite element simulations, thereby demonstrating a promising new in vivo measurement protocol.
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1 Rutherford Appleton Laboratory, ISIS Neutron & Muon Source, Didcot, UK (GRID:grid.76978.37) (ISNI:0000 0001 2296 6998); Harwell Science and Innovation Campus, The Faraday Institution, Didcot, UK (GRID:grid.502947.d) (ISNI:0000 0005 0277 5085)
2 University Road, University of Southampton, Faculty of Engineering and Physical Sciences, Southampton, UK (GRID:grid.5491.9) (ISNI:0000 0004 1936 9297); Environment and Society, Scottish Rural University College, Rural Economy, Edinburgh, UK (GRID:grid.426884.4) (ISNI:0000 0001 0170 6644)
3 Rutherford Appleton Laboratory, Diamond Light Source, Didcot, UK (GRID:grid.76978.37) (ISNI:0000 0001 2296 6998)
4 University Road, University of Southampton, Faculty of Engineering and Physical Sciences, Southampton, UK (GRID:grid.5491.9) (ISNI:0000 0004 1936 9297); Faculty of Science and Health, University of Portsmouth, Portsmouth, UK (GRID:grid.4701.2) (ISNI:0000 0001 0728 6636)
5 University Road, University of Southampton, Faculty of Engineering and Physical Sciences, Southampton, UK (GRID:grid.5491.9) (ISNI:0000 0004 1936 9297); School of the Environment, Yale University, New Haven, USA (GRID:grid.47100.32) (ISNI:0000 0004 1936 8710)
6 University Road, University of Southampton, Faculty of Engineering and Physical Sciences, Southampton, UK (GRID:grid.5491.9) (ISNI:0000 0004 1936 9297)
7 University Road, University of Southampton, Faculty of Engineering and Physical Sciences, Southampton, UK (GRID:grid.5491.9) (ISNI:0000 0004 1936 9297); Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, Australia (GRID:grid.1010.0) (ISNI:0000 0004 1936 7304)