Short communication. Tomography as a method to study umbrella pine (Pinus pinea) cones and nuts

  • Alexandra Nunes Forest Research Centre, Department of Natural Resources, Environment and Territory, School of Agriculture, University of Lisbon, Tapada da Ajuda, Lisboa.
  • Helena Pereira Forest Research Centre, Department of Natural Resources, Environment and Territory, School of Agriculture, University of Lisbon, Tapada da Ajuda, Lisboa.
  • Margarida Tomé Forest Research Centre, Department of Natural Resources, Environment and Territory, School of Agriculture, University of Lisbon, Tapada da Ajuda, Lisboa.
  • Joao Silva Forest Research Centre, Department of Natural Resources, Environment and Territory, School of Agriculture, University of Lisbon, Tapada da Ajuda, Lisboa.
  • Luis Fontes Forest Research Centre, Department of Natural Resources, Environment and Territory, School of Agriculture, University of Lisbon, Tapada da Ajuda, Lisboa.
DOI: https://doi.org/10.5424/fs/2016252-08930
Keywords: pine cone, pine nuts, stone pine, tomography, CAT

Abstract

Aim of study: Umbrella or stone pine (Pinus pinea) nuts are one of the most valuable and expensive non-wood forest products in Portugal. The increasing market and landowner's interest resulted on a high expansion of plantation areas. This study tests the feasibility of using tomography to characterize pine cones and nuts.

Area of study: The research was carried out in pine stand, with nine years, grafted in 2011, on Herdade of Machoqueira do Grou, near Coruche, in Portugal’s central area.

Material and Methods: Starting in June 2015, ten pine cones in their final stage of development, were randomly monthly collected, and evaluated with tomography equipment commonly used in clinical medicine, according to Protocol Abdomen Mean. A sequence of images corresponding to 1mm-spaced cross-sections were obtained and reconstructed to produce a 3D model. The segmented images were worked using free image processing software, like RadiAnt Dicom Viewer, Data Viewer and Ctvox.

Main results: The cone’s structures were clearly visible on the images, and it was possible to easily identify empty pine nuts. Although expensive, tomography is an easy and quick application technique that allows to assess the internal structures, through the contrast of materials densities, allowing to estimate pine nut’s size and empty nut’s proportion. By analysis of ninety images, it was obtained, an estimated mean value of 25.5 % empty nuts.

Research highlights: Results showed the potential of tomography as a screening tool to be used in industry and research areas, for analysis and diagnostic of stone pine cone’s structures.

Keywords: pine cone; pine nuts; stone pine; tomography; CAT.

Abbreviations: CAT: computerized axial tomography; 3D: three dimensional; HU: Hounsfield Units.

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References

References

Bensadoun F, Barburski M, Straumit I, Le Quan Tran N, Fuentes C, Zenina J, Shishkina O, Pyka G, Verpoest I, Van Vuure A, Wevers M, Lomov S, 2014. Challenges of X-Ray tomography technique on natural fibre-based composites, 11th European Conference on Non-Destructive Testing, Prague, Czech Republic.

Calado, N, 2012. Oral presentation in Fileira da Pinha/Pinhão – Necessidades de Informação e Conhecimento organized by UNAC in 18 September 2012, http://www.unac.pt/attachments/162_02_Nuno%20Calado%20-%20UNAC.pdf, Alcácer do Sal, Portugal.

Costa R, Evaristo I, 2014. Caracteríticas nutricionais do pinhão, Oral presentation in Valorização da Fileira da Pinha/Pinhão organized by UNAC in 28 March 2014, http://www.unac.pt/attachments/article/184/07_INIAV_Rita%20Costa%20e%20Isabel%20Evaristo.pdf, Alcácer do Sal, Portugal.

Cresswell J, Henning K, Pennel C, Lahoubi M, Patrick M, Young P, Tabor G, 2007. Conifer ovulate cones accumulate pollen principally by simple impaction. PNAS, 104: 46, 18141-18144. http://dx.doi.org/10.1073/pnas.0706434104

Decree-Law 77/2015. 12th of May. Diário da Réplica 1.ª Série-N.º 91. Ministério da Agricultura e do Mar de Portugal. 2430-2433.

Gee C, 2013. Applying MicroCT and 3D visualization to jurassic silicified conifer seed cones: A virtual advantage over thin-section. Applic Plant Sciences 1(11): 1300039. http://dx.doi.org/10.3732/apps.1300039

Oliveira V, Lopes P, Cabral M, Pereira H, 2015. Influence of cork defects in the oxygen ingress through wine stoppers: Insights with X-ray tomography. J Food Engineering 165: 66-73. http://dx.doi.org/10.1016/j.jfoodeng.2015.05.019

Tamburini M, Maresi G, Salvadori C, Battisti A, Zottele F, Pedrazolli F, 2012. Adaptation of the invasive western conifer seed bug Leptoglossus occidentalis to Tentrino, an alpine region (Italy). Bulletin of Insectology 65(2): 161-170.

Published
2016-07-20
How to Cite
Nunes, A., Pereira, H., Tomé, M., Silva, J., & Fontes, L. (2016). Short communication. Tomography as a method to study umbrella pine (Pinus pinea) cones and nuts. Forest Systems, 25(2), eSC10. https://doi.org/10.5424/fs/2016252-08930
Issue
Vol. 25 No. 2 (2016)
Section
FORESTERRA

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