Three-dimensional in vivo magnetic resonance microscopy of beech (Fagus sylvatica L.) wood

Merela, Maks; Oven, Primož; Sepe, Ana; Serša, Igor

doi:10.1007/s10334-005-0109-5

Cited by 22 publications

(10 citation statements)

References 7 publications

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“…5A) revealed a different functional pattern of the anatomically diffuse-porous organised xylem vascular system. In agreement with Merela et al (2005), concentric layers of earlywood vessels were prominent in MRM images, indicating that earlywood vessels of the growth ring in beech may be predominantly involved in upward water transport.…”

Section: Resultssupporting

confidence: 75%

“…The first magnetic resonance images of wood were used for macroscopic rather than microscopic examination of the scanned material. The structures revealed the shape of the sample, sapwood and heartwood, the presence of rays and also defects as varied as reaction wood, wet-wood, decay and gum spots, and knots and growth rings in healthy and affected trees were usually easily distinguished (Kucera 1986;Wang & Chang 1986;Chang et al 1989;Flibotte et al 1990;Torelli et al 1990;Beravs et al 1998;Coates et al 1998;Bucur 2003a;Bucur 2003b;Morales et al 2004;Merela et al 2005;Johannessen et al 2006). Magnetic resonance imaging has also been used for observation of anisotropic movement of water below and above the fibre saturation point (Hernandez & Caceres 2010;Meder et al 2003), moisture movement and swelling of oriented strand boards (Van Houts et al 2004), penetration of waterborne preservative in wood (Hall & Rajanayagam 1986;Dawson-Andoh et al 2001), early detection of fungal infection in solid wood (Müller et al 2001), for non-invasive dynamic studies of plant-pathogen interactions, and for studying the development of necrotic lesions in tree stems and the wound response of living tree tissues (Pearce et al 1994(Pearce et al , 1997Barry et al 2001;Kuroda et al 2006;Oven et al 2008).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Application of 3D magnetic resonance microscopy to the anatomy of woody tissues

Oven¹,

Merela²,

Mikac³

et al. 2011

IAWA J

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We demonstrate the use of high-resolution three-dimensional magnetic resonance microscopy (3D MRM) for anatomical studies of woody tissues. Samples of normal and pathological structures in the branches of four tree species were imaged by 3D MRM immediately after removal from the tree, without additional tissue preparation. MRM data sets were displayed in 2D sections and in a 3D volume rendered mode. Good image contrasts between identical anatomical structures in different tree species suggest that 3D MRM may be a promising method in comparative wood anatomy. MRM can be used for general morphological observations, as well as for positioning and examination of a particular portion of tissue in the investigated object. This is demonstrated by examples of a needle trace within the xylem in Norway spruce and by localisation of the protection zone at the base of a dead branch in beech. Visualisation of a wound scar in beech demonstrates the efficiency of 3D MRM in revealing the spatial dimensions of any moisture-related structural defects within wood. It can provide relatively high and isotropic resolution, thus enabling non-destructive and accurate determination of the moisture content of any wood structure. High-resolution 3D MRM has great potential in studying the anatomy of woody plants due to the non-destructive nature of the technique, the simplicity of tissue preparation and very versatile information retrieval by choosing an appropriate MRM method and its parameter set.

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Section: Resultssupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Application of 3D magnetic resonance microscopy to the anatomy of woody tissues

Oven¹,

Merela²,

Mikac³

et al. 2011

IAWA J

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show abstract

“…Several works used this technique to make the separation of the sapwood and heartwood, description of growth rings and visualisation of internal defects or anomalies of wood (Kuroda et al, 2006;Eberhardt et al, 2006). MRI was also used for non-invasive qualitative and quantitative studies of water distribution in wood and wood-drying kinetics (Quick et al, 1990;Meder et al, 2003;van Houts et al, 2004;Merela et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

NMR imaging of fluid pathways during drainage of softwood in a pressure membrane chamber

Almeida

Leclerc

Perré

2008

International Journal of Multiphase Flow

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An experiment was implemented to study fluid flow in a pressure media. This procedure successfully combines nuclear magnetic resonance imaging with a porous membrane chamber in order to visualize the non-wetting and wetting fluid flows with controlled boundary conditions. A specific pressure minute membrane chamber, made of non magnetic materials and able to withstand 4 MPa, was conceived and built for this purpose. These two techniques were applied to the drainage of Douglas fir sapwood. In the study of the longitudinal flow, narrow drainage fingers are formed in the latewood zones. They follow the longitudinal direction of wood and spread throughout the sample length. These fingers then enlarge in the cross-section plane and coalesce until drainage reach the whole latewood part. At the end of the essays, when drainage of liquid water in latewood is completed, just a few sites of percolation appear in earlywood zones. This difference is a result of the wood anatomical structure, where pits, the apertures that allow the sap to flow between wood cells, are more easily aspirated in earlywood than in latewood.

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“…Straže et al, 2015). This phase is followed by defence response of trees (Merela et al, 2005;Oven et al, 2008;Shigo and Wilson, 1972;Shigo and Marx, 1977;Shortle, 1979). As beech wood is not resistant to various biological pests, we can expect wood deterioration and severe loss of wood quality already in a short time after the exposure (Humar et al, 2015).…”

Section: Discussionmentioning

confidence: 99%