Imaging local soil kinematics during the first days of maize root growth in sand

Abstract Maize seedlings are grown in Hostun sand with two different gradings and two different densities. The root-soil system is imaged daily for the first 8 days of plant growth with X-ray computed tomography. Segmentation, skeletonisation and digital image correlation techniques are used to anal...

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Autores principales:	Floriana Anselmucci, Edward Andò, Gioacchino Viggiani, Nicolas Lenoir, Chloé Arson, Luc Sibille
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/411a4f5aa1724299a75e42a5eb19367b
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spelling	oai:doaj.org-article:411a4f5aa1724299a75e42a5eb19367b2021-11-21T12:17:11ZImaging local soil kinematics during the first days of maize root growth in sand10.1038/s41598-021-01056-12045-2322https://doaj.org/article/411a4f5aa1724299a75e42a5eb19367b2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01056-1https://doaj.org/toc/2045-2322Abstract Maize seedlings are grown in Hostun sand with two different gradings and two different densities. The root-soil system is imaged daily for the first 8 days of plant growth with X-ray computed tomography. Segmentation, skeletonisation and digital image correlation techniques are used to analyse the evolution of the root system architecture, the displacement fields and the local strain fields due to plant growth in the soil. It is found that root thickness and root length density do not depend on the initial soil configuration. However, the depth of the root tip is strongly influenced by the initial soil density, and the number of laterals is impacted by grain size, which controls pore size, capillary rise and thus root access to water. Consequently, shorter root axes are observed in denser sand and fewer second order roots are observed in coarser sands. In all soil configurations tested, root growth induces shear strain in the soil around the root system, and locally, in the vicinity of the first order roots axis. Root-induced shear is accompanied by dilative volumetric strain close to the root body. Further away, the soil experiences dilation in denser sand and compaction in looser sand. These results suggest that the increase of porosity close to the roots can be caused by a mix of shear strain and steric exclusion.Floriana AnselmucciEdward AndòGioacchino ViggianiNicolas LenoirChloé ArsonLuc SibilleNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Floriana Anselmucci Edward Andò Gioacchino Viggiani Nicolas Lenoir Chloé Arson Luc Sibille Imaging local soil kinematics during the first days of maize root growth in sand
description	Abstract Maize seedlings are grown in Hostun sand with two different gradings and two different densities. The root-soil system is imaged daily for the first 8 days of plant growth with X-ray computed tomography. Segmentation, skeletonisation and digital image correlation techniques are used to analyse the evolution of the root system architecture, the displacement fields and the local strain fields due to plant growth in the soil. It is found that root thickness and root length density do not depend on the initial soil configuration. However, the depth of the root tip is strongly influenced by the initial soil density, and the number of laterals is impacted by grain size, which controls pore size, capillary rise and thus root access to water. Consequently, shorter root axes are observed in denser sand and fewer second order roots are observed in coarser sands. In all soil configurations tested, root growth induces shear strain in the soil around the root system, and locally, in the vicinity of the first order roots axis. Root-induced shear is accompanied by dilative volumetric strain close to the root body. Further away, the soil experiences dilation in denser sand and compaction in looser sand. These results suggest that the increase of porosity close to the roots can be caused by a mix of shear strain and steric exclusion.
format	article
author	Floriana Anselmucci Edward Andò Gioacchino Viggiani Nicolas Lenoir Chloé Arson Luc Sibille
author_facet	Floriana Anselmucci Edward Andò Gioacchino Viggiani Nicolas Lenoir Chloé Arson Luc Sibille
author_sort	Floriana Anselmucci
title	Imaging local soil kinematics during the first days of maize root growth in sand
title_short	Imaging local soil kinematics during the first days of maize root growth in sand
title_full	Imaging local soil kinematics during the first days of maize root growth in sand
title_fullStr	Imaging local soil kinematics during the first days of maize root growth in sand
title_full_unstemmed	Imaging local soil kinematics during the first days of maize root growth in sand
title_sort	imaging local soil kinematics during the first days of maize root growth in sand
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/411a4f5aa1724299a75e42a5eb19367b
work_keys_str_mv	AT florianaanselmucci imaginglocalsoilkinematicsduringthefirstdaysofmaizerootgrowthinsand AT edwardando imaginglocalsoilkinematicsduringthefirstdaysofmaizerootgrowthinsand AT gioacchinoviggiani imaginglocalsoilkinematicsduringthefirstdaysofmaizerootgrowthinsand AT nicolaslenoir imaginglocalsoilkinematicsduringthefirstdaysofmaizerootgrowthinsand AT chloearson imaginglocalsoilkinematicsduringthefirstdaysofmaizerootgrowthinsand AT lucsibille imaginglocalsoilkinematicsduringthefirstdaysofmaizerootgrowthinsand
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Imaging local soil kinematics during the first days of maize root growth in sand

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