Teakwood Chemistry and Natural Durability

Niamké, Florence Bobelé; Amusant, Nadine; Augustin, Adima Amissa; Chaix, Gilles

doi:10.1007/978-3-030-79311-1_7

Cited by 2 publications

(4 citation statements)

References 74 publications

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“…This agrees with the results of Moya and Calvo-Alvarado (2012). Teak yellowness (b*) is reported to correlate positively with soil pH, calcium, magnesium but negatively with potassium, iron, and phosphorus (Derkyi et al 2010;Moya and Calvo-Alvarado 2012), although the brightness parameter L* is known a better indicator of the durability of teakwood (Niamké et al 2021). An interesting pattern was found in the brightness parameter; it was lower in the LR and CS surfaces for slow-growing and fast-growing sides, respectively.…”

Section: Overall Findingsmentioning

confidence: 99%

“…Heartwood in teak is believed to initiate at between 4 to 6 years (Moya et al 2014) after the living functional cells die (Hillis 1987). Two main chemical constituents, namely tectoquinones and anthraquinines, in heartwood play an important role in the biological resistance of the wood (Rudman and Gay 1961;Sumthong et al 2006;Lukmandaru and Takahashi 2009;Niamké et al 2021;Gasparik et al 2019). The spatial distribution of extractives in the tree could explain the variation in heartwood color (Niamké et al 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Two main chemical constituents, namely tectoquinones and anthraquinines, in heartwood play an important role in the biological resistance of the wood (Rudman and Gay 1961;Sumthong et al 2006;Lukmandaru and Takahashi 2009;Niamké et al 2021;Gasparik et al 2019). The spatial distribution of extractives in the tree could explain the variation in heartwood color (Niamké et al 2021). Wood color, like any other trait, can vary widely within the tree.…”

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal variation and covariation of heartwood color in planted teak wood from Ghana

Adutwum

Matsumura

2022

BioRes

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Heartwood color is a complex trait that affects the economic and aesthetic value of the wood but is highly variable. How the color of the heartwood varies spatially and temporally is poorly understood. To illustrate how heartwood color varies within a tree, two opposite aspects of wood within the same tree, representing differential growth rate, were used to model the long-short axis system jointly. The color of the heartwood on the long and the short axis was considered to be two different traits. By jointly modeling the long and short axes, the correlation was examined between aspect (spatial) and contemporaneous correlations (within aspect). Spatial and temporal correlations and their interactions describe the indirect physiological, genetic, and environmental changes in wood formation with time and position in the trunk. Spatial correlations were consistently lower than temporal correlations but were positive and significant. Between the heartwood color parameters, b* showed a relatively higher spatial correlation. The results suggest that there is a spatial correlation in the long-short axis for all color parameters and in the two surfaces. Variations between aspects were not statistically significant for any color parameter. The bivariate mixed model method revealed hidden physics behind heartwood color formation. Models need to be developed to account for both spatial and temporal dependence in studies of wood property change.

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Section: Overall Findingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal variation and covariation of heartwood color in planted teak wood from Ghana

Adutwum

Matsumura

2022

BioRes

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“…It is also widely used in the flooring industry, barrels, and sculptures [3]. Such applications require wood to exhibit high dimensional stability under different climatic conditions, attractive and stable coloration, and resistance to xylophagous organisms and weathering [4,5].…”

Section: Introductionmentioning

confidence: 99%

Wood Quality of Young Tectona grandis L. f. Trees and Its Relationship with Genetic Material and Planting Site in Mato Grosso, Brazil

de Souza,

da Silva,

Azevedo

et al. 2024

Forests

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Tectona grandis L. f. (teak) is highly valued in the international market, but its volume and properties vary depending on its genetic material and planting site. Evaluating these factors is crucial for promoting new plantations. Therefore, this study aimed to assess the impact of genetic material (clones TG1 and TG3 and seminal material) and planting site (Nova Maringá and Água Boa, Mato Grosso, Brazil) on morphological parameters (heartwood, sapwood, bark, pith proportions, and pith eccentricity), physical properties (shrinkage and air-dry density), and mechanical properties (static bending strength—fm, compressive strength—fc0, Janka hardness—fH90, and shear strength—fv0). For this purpose, we sampled five trees aged 13 years per genetic material from commercial plantations. In Nova Maringá, trees exhibited, on average, 56.07% heartwood, while in Água Boa, this value was less than 50%. Seminal material showed the lowest percentage of heartwood (49.2%). The pith percentage was significantly greater in Água Boa than in Nova Maringá, regardless of the genetic material. We observed the highest standard deviation (5.61) in pith eccentricity for the seminal material. Both the planting site and genetic material influenced the air-dry density (~12% moisture content), which ranged from 0.535 to 0.618 g·cm−3. Trees grown in Nova Maringá produced wood with higher dimensional stability than those from Água Boa, exhibiting a 14% lower radial shrinkage and a 6% lower volumetric variation. In Nova Maringá, the wood from the seminal material exhibited greater resistance. On the other hand, in Água Boa, that material showed lower resistance (fv0, fm, and fc0), or there was no significant difference (fH90) compared to the clonal materials. When comparing the clonal materials (TG1 and TG3) at each planting site, they demonstrated similar mechanical properties. The variability in physical and mechanical properties among different genetic materials and planting locations highlights the need to select appropriate teak genetic materials for each region. We concluded that more productive teak clones can be selected without compromising the physical and mechanical properties of the wood.

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Teakwood Chemistry and Natural Durability

Cited by 2 publications

References 74 publications

Spatiotemporal variation and covariation of heartwood color in planted teak wood from Ghana

Spatiotemporal variation and covariation of heartwood color in planted teak wood from Ghana

Wood Quality of Young Tectona grandis L. f. Trees and Its Relationship with Genetic Material and Planting Site in Mato Grosso, Brazil

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