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Type: Journal article
Title: Quantifying the effect of soil compaction on three varieties of wheat (Triticum aestivum L.) using x-ray micro computed tomography (CT)
Author: Tracy, S.
Black, C.
Roberts, J.
McNeill, A.
Davidson, R.
Tester, M.
Samec, M.
Korosak, D.
Sturrock, C.
Mooney, S.
Citation: Plant and Soil, 2012; 353(1-2):195-208
Publisher: Kluwer Academic Publ
Issue Date: 2012
ISSN: 0032-079X
Statement of
Saoirse R. Tracy, Colin R. Black, Jeremy A. Roberts, Ann McNeill, Rob Davidson, Mark Tester, Marko Samec, Dean Korošak, Craig Sturrock, Sacha J. Mooney
Abstract: Aims: X-ray Micro Computed Tomography (CT) enables interactions between roots and soil to be visualised without disturbance. This study examined responses of root growth in three Triticum aestivum L. (wheat) cultivars to different levels of soil compaction (1.1 and 1.5 g cm−3). Methods: Seedlings were scanned 2, 5 and 12 days after germination (DAG) and the images were analysed using novel root tracking software, Root- Viz3D®, to provide accurate visualisation of root architecture. RootViz3D® proved more successful in segmenting roots from the greyscale images than semi-automated segmentation, especially for finer roots, by combining measurements of pixel greyscale values with a probability approach to identify roots. Results: Root density was greater in soil compacted at 1.5 g cm−3 than at 1.1 gcm−3 (P=0.04). This effect may have resulted from improved contact between roots and surrounding soil. Root diameter was greater in soil at a high bulk density (P=0.006) but overall root length was reduced (P=0.20). Soil porosity increased with time (P<0.001) in the uncompacted treatment. Conclusions: RootViz3D® root tracking software in X-ray CT studies provided accurate, non-destructive and automated three dimensional quantification of root systems that has many applications for improving understanding on root-soil interactions.
Keywords: X-ray MicroComputedTomography; Root Architecture; Soil compaction; Triticum aestivum L.; Automated root tracking software
Rights: © Springer Science+Business Media B.V. 2011
RMID: 0020118309
DOI: 10.1007/s11104-011-1022-5
Appears in Collections:Agriculture, Food and Wine publications

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