Anatomy and lignin distribution of reaction wood in two Magnolia species

Yoshizawa, Nobuo; Inami, A.; Miyake, Shingo; Ishiguri, Futoshi; Yokota, Shinso

doi:10.1007/s002260000046

Cited by 49 publications

(53 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A group of UV studies have concerned tension wood in various hardwood species (Lehringer et al 2008;Ruelle et al 2007;Yoshida et al 2002;Yoshizawa et al 2000) and have shown a decrease in absorbance around 280 nm corresponding to a decrease in lignin content (G units). One study has taken a more intervening experimental approach to UV studies of tension wood (Yoshida et al 2005) by inducing extra gravity to growing secondary xylem of Prunus jamasakura.…”

Section: Uv-vis Spectra Of Lignin and Other Ring Structuresmentioning

confidence: 99%

Microspectroscopy as applied to the study of wood molecular structure

Fackler

Thygesen

2012

Wood Sci Technol

View full text Add to dashboard Cite

Microspectroscopy gives access to spatially resolved information on the molecular structure and chemical composition of a material. For a highly heterogeneous and anisotropic material like wood, such information is essential when assessing structure/property relationships such as moisture-induced dimensional changes, decay resistance or mechanical properties. It is, however, important to choose the right technique for the purpose at hand and to apply it in a suitable way if any new insights are to be gained. This review presents and compares three different microspectroscopic techniques: infrared, Raman and ultraviolet. Issues such as sample preparation, spatial resolution, data acquisition and extraction of knowledge from the spectral data are discussed. Additionally, an overview of applications in wood science is given for each method. Lastly, current trends and challenges within microspectroscopy of wood are discussed.

show abstract

Section: Uv-vis Spectra Of Lignin and Other Ring Structuresmentioning

confidence: 99%

Microspectroscopy as applied to the study of wood molecular structure

Fackler

Thygesen

2012

Wood Sci Technol

View full text Add to dashboard Cite

show abstract

“…In poplar and eucalyptus wood, fibres and vessels were significantly longer with an increase in the proportion of fibres and very thick cell walls (Baba et al 1996, Jourez et al 2001. Although the G-layer is the principal characteristic for determining the presence of tension wood, some studies have showed that the G-layer is absent in the tension wood of several hardwood species (Onaka 1949, Fisher and Stevenson 1981, Yoshizawa et al 2000, Clair et al 2006.…”

Section: Introductionmentioning

confidence: 99%

Determination of Differences in Anatomical and Chemical Characteristics of Tension and Opposite Wood of 8-Year Old Eucalyptus Globulus

Aguayo

Quintupill

Castillo

et al. 2010

Maderas, Cienc. tecnol.

View full text Add to dashboard Cite

Tension and opposite wood, divided in the corresponding heartwood and sapwood regions, from 8-year old Eucalyptus globulus trees were characterized for chemical composition and fibre anatomy in the transverse section in order to identify the main differences. Thicker and poorly lignified cell walls were found in tension wood. Cellulose content was similar for both woods, although tension wood contained 30% higher xylose and 15% less lignin than opposite wood. Lignin of tension wood contained 24% more syringyl units and a higher frequency of β-O-4 linkages. Principal component analysis (PCA) performed separately with anatomical and chemical data showed a clear separation between tension and opposite wood. The principal characteristics used for separation were: cell wall thickness, vessel diameter, lumen diameter, lignin and xylose content, and amount of syringyl units.

show abstract

“…A relationship between growth stress and microfibril angle of secondary wall in wood fibers has been reported in reaction wood in angiosperms: the microfibril angle was smaller in the S2 layers of reaction wood fibers compared to that of opposite wood fibers ( [15,[40][41][42]50]. Okuyama et al [15] suggested that microfibril angle is an important factor in the generation of growth stress in tension wood.…”

Section: Microfibril Angle In Tension Wood Fibermentioning

confidence: 99%

“…2B, 3B) [33][34][35][36][37][38]. In some species having no G-layer in reaction wood, it has been reported that microfibril angle of S2 layer decreased [15,[39][40][41][42] reported that the microfibril angle of S2 layer was very small (5 to 10 degrees) in reaction wood of Magnolia acuminate and Liriodendron tulipifera. In Magnolia obovata and M. kobus, the innermost surface of S2 layer of fiber tracheid wall also showed a small microfibril angle [41].…”

Section: Microfibril Angle In Tension Wood Fibermentioning

confidence: 99%

“…In some species having no G-layer in reaction wood, it has been reported that microfibril angle of S2 layer decreased [15,[39][40][41][42] reported that the microfibril angle of S2 layer was very small (5 to 10 degrees) in reaction wood of Magnolia acuminate and Liriodendron tulipifera. In Magnolia obovata and M. kobus, the innermost surface of S2 layer of fiber tracheid wall also showed a small microfibril angle [41]. Microfibril angle of S2 layer in wood fiber may not always decrease by the reaction wood formation in some species having S3 layer and lacking G-layer, or efficient tensile stress so as to make the microfibril angle small in other sample trees used here may have not been generated.…”

Section: Microfibril Angle In Tension Wood Fibermentioning

confidence: 99%

See 1 more Smart Citation

An Overview of Microfibril Angle in Fiber of Tension Wood

Sultana¹

2014

EJB

View full text Add to dashboard Cite

Abstract:The angle between helical windings of microfibrils in the secondary cell wall of fibers and the long axis is called microfibril angle (MFA). Stiffness of wood depends on variations in the MFA. The large MFA shows low stiffness, which is found in juvenile wood and this character make threes vulnerable to high winds breaking. Timber containing a high proportion of juvenile wood is unsuitable for use as high-grade structural timber. On the other hand, the small MFA in wood shows high stiffness, which has importance in a good view of the trend in forestry. The timber with high stiffness is commonly high economic value. They are grown mainly for construction, timber and furniture. Until date, it is under pressure for increased timber production means that ways will be sought to improve the quality of timber by reducing MFA. Commonly, MFA decrease during the formation of tension wood therefore study on tension wood related to MFA formation is important for MFA reduction in normal wood. The study on tension wood formation could predict expression patterns of genes/proteins for reduction of MFA. Herein, the orientation of microfibril and MFA in cell wall layers of normal and tension wood fiber are discussed.

show abstract

Anatomy and lignin distribution of reaction wood in two Magnolia species

Cited by 49 publications

References 0 publications

Microspectroscopy as applied to the study of wood molecular structure

Microspectroscopy as applied to the study of wood molecular structure

Determination of Differences in Anatomical and Chemical Characteristics of Tension and Opposite Wood of 8-Year Old Eucalyptus Globulus

An Overview of Microfibril Angle in Fiber of Tension Wood

Contact Info

Product

Resources

About