Abstract
The variability of fibre and ray dimensions was studied at three radial positions (10, 50 and 90% of radius) in 5 cork oaks (Quercus suber L.) approximately 40 years old. Uniseriate ray height and cell number as well as multiseriate ray height and width were measured in tangential sections. Fibre length, width and wall thickness were measured after maceration. The most striking features of cork oak wood were the large multiseriate rays and the frequent homocellular uniseriate rays. On average multiseriate rays were 5.16 mm high and 0.48 mm wide, and uniseriate rays contained 11 cells and were 227 μm high. Neighbour rays presented large dimensional differences but there was no radial variation and there were very small between-tree differences. The radial maintenance of high and wide rays was discussed as a means to improve water shortage in response to water stress. Fibre dimensions increased radially but differed little between trees: on average, 960–1,220 μm length, 18.40–21.49 μm width and 6.66–8.07 μm wall thickness. The ray pattern showed enough variation for visual appreciation while ensuring within and between-tree uniformity. The presence of rays has to be taken into consideration for designing wood drying programs.
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References
Barghoorn ES (1941) The ontogenetic development and phylogenetic specialization of rays in the xylem of dicotyledons. II. Modification of the multiseriate and uniseriate rays. Am J Bot 28:273–282
Butterfield BG (2003) Wood anatomy in relation to wood quality. In: Barnett JR, Jeronimidis G (eds) Wood quality and its biological basis. Blackwell Publishing, Oxford, pp 30–49
Carlquist S (1962) A theory of paedomorphosis in dicotyledonous woods. Phytomorphology. 12:30–45
Carlquist S (2001) Comparative wood anatomy: systemmatic, ecological and evolutionary aspects of dicotyledon wood. Springer, Berlin Heidelberg New York
Carvalho A (1953) Madeiras de folhosas. Contribuição para o seu estudo e identificação. Graduation Thesis, Instituto Superior de Agronomia, Lisboa
Carvalho A (1997) Madeiras Portuguesas. Estrutura anatómica, propriedades e utilizações. Vol. II. Direcção-Geral das Florestas, Lisboa
Coutinho AXP (1886) Curso de Silvicultura. 1. Botânica florestal. Typografia da Academia Real das Sciencias de Lisboa, Lisboa
Fortes MA, Rosa ME, Pereira H (2004) A cortiça. IST Press, Lisboa
Gaio FVL (1951). A madeira de sobreiro na produção da celulose industrial. Graduation Thesis, Instituto Superior de Agronomia, Lisboa
García-Esteban L, Guíndeo-Casasús A (1989) Anatomía de las maderas frondosas españolas. AITIM, Madrid
González-Adrados JR, Gourlay ID (1998) Applications of dendrochronology to Quercus suber L. In: Pereira H (eds) Cork oak and cork. Proceedings of the European conference on cork oak and cork, Centro de Estudos Florestais, Lisboa, pp 162–172
Gourlay ID, Pereira H (1998) The effect of bark stripping on wood production in cork oak (Quercus suber L.) and problems of growth ring definition. In: Pereira H (eds) Cork oak and cork. Proceedings of the European conference on cork oak and cork, Centro de Estudos Florestais, Lisboa, pp 99–107
IAWA Commitee (1989) IAWA list of microscopic features for hardwood identification, with an appendix on non-anatomical information. IAWA Bull. 10:219–332
Leal S, Pereira H (2005) Influence of cork removal and precipitation on ring width and vessel characteristics of Quercus suber L. Agro-for Syst (in press)
Mathieu A (1877) Flore forestière. Berger-Levrault, Paris
Natividade JV (1950) Subericultura. Direcção Geral das Florestas, Lisboa
Nunes EMC (1998) Estudo da influência da precipitação e temperatura no crescimento juvenil de Quercus suber L. através da análise dos anéis anuais de crescimento. Ms. D. Thesis, Instituto Superior de Agronomia, Lisboa
Pereira H, Tomé M (2004) Cork oak. In: Burley J, Evans J, Youngquist JA (eds) Encyclopedia of forest sciences. Elsevier Academic Press, Oxford, pp 613–620
Plá y Rave E (1880) Tratado de las maderas de construcción civil y naval. Imprenta Estereotipica y Galvanoplastia de Aribau y Ca (Sucesores de Rivadereyra), Madrid
Quilhó T, Pereira H, Richter HG (2000) Within tree variation in phloem cell dimensions and properties in Eucalyptus globulus. IAWA J 21(1):31–40
Record SJ, Hess RW (1943) Timbers of the new world. Yale University Press, New Haven
Tomé M, Coelho M B, Lopes F, Pereira H (1998) Modelo de produção para o montado de sobro em Portugal. In: Pereira H (ed) Cork oak and cork. Proceedings of the European conference on cork oak and cork: Centro de Estudos Florestais, Lisboa, pp 22–46
Tsoumis G (1991) Science and technology of wood. Structure, properties, utilization. Van Nostrand Reinhold, New York
Voulgaridis E (1990) Wood cell morphology characteristics of some oak species and mediterranean shrubs. Holz Roh- Werkst 48:261–267
Wagenführ R, Scheiber C (1985) Holzatlas. VEB Fachbuchverlag, Leipzig
Zobel BJ, van Buijtenen JP (1989) Wood variation. Its causes and control. Springer, Berlin Heidelberg New York
Acknowledgements
This study is part of the European project Suberwood (QLRT 2000-0701). The first author acknowledges additional funding granted by the Portuguese Science Foundation (FCT) under the programme POCTI. We also acknowledge Dr. Teresa Quilhó (IICT) and Prof. Fátima Tavares (ISA) for recommendations concerning material and methods, Cristiana Alves for technical assistance and Jorge Gominho for help with the statistical analysis.
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Leal, S., Sousa, V.B. & Pereira, H. Within and between-tree variation in the biometry of wood rays and fibres in cork oak (Quercus suber_L.). Wood Sci Technol 40, 585–597 (2006). https://doi.org/10.1007/s00226-006-0073-x
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DOI: https://doi.org/10.1007/s00226-006-0073-x