Geographic Variations of the Wood Density and Fiber Dimensions of the Persian Oak Wood

Nazari, Noorollah; Bahmani, Mohsen; Kahyani, Saleh; Humar, Miha; Koch, Gerald

doi:10.3390/f11091003

Cited by 15 publications

(9 citation statements)

References 30 publications

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“…Generally, an increase in tree growth was related to a slightly higher FL. Several previous studies have shown that FL increases with increasing tree growth [ 28 – 31 ]. In the present study, the genetic correlations between growth traits and FL were also positive at the six sites, indicating that triploid breeding of Populus not only improves the FL but also increases the tree growth.…”

Section: Discussionmentioning

confidence: 99%

Genotype-environment interaction and stability of fiber properties and growth traits in triploid hybrid clones of Populus tomentosa

Zhou

Sang

et al. 2021

BMC Plant Biol

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Background Clones provide a sensitive method for evaluating genotypic stability and detecting genotype-environment (G × E) interactions because of non-additive genetic effects among clones and there being no genetic effect among ramets of an ortet. With this study, we aimed to confirm and expand earlier findings, estimate stability parameters, and provide accurate estimates of clonal repeatabilities and genetic gains for a triploid breeding program of P. tomentosa Carr. Results Six 5-year-old clonal trials established in Northern China were used to determine the clonal variation, clone × site interactions, and the stability parameters of fiber properties of wood and growth traits. 360 trees from ten hybrid clones were collected from six sites. The clonal and site effects had a highly significant effect (P < 0.001) for all studied traits. While the clone × site interactions had a highly significant effect (P < 0.001) on fiber length (FL), coarseness (C), and tree growth (tree height [H], diameter at breast height [DBH] and stem volume [SV]), and a moderate effect (P < 0.05) on fiber width (FW) and fiber length/width (FL/W). For FL and SV, most of the triploid hybrid clones had higher reaction norms to the improvement in growth conditions and higher phenotypic plasticity. The estimated clonal repeatability of FW (0.93) was slightly higher than for FL (0.89), FL/W (0.83), C (0.91), DBH (0.76), H (0.85), and SV (0.80). Three clonal testing sites were sufficient to estimate quantitative parameters of fiber properties, however, more clonal testing sites would help improve the accuracy of quantitative parameters of the growth traits. Conclusions Our results highlight that accurate estimation of quantitative parameters for growth traits in triploid hybrid clones of P. tomentosa requires more clonal testing sites than the fiber properties.

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Section: Discussionmentioning

confidence: 99%

Genotype-environment interaction and stability of fiber properties and growth traits in triploid hybrid clones of Populus tomentosa

Zhou

Sang

et al. 2021

BMC Plant Biol

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“…It has been indicated that the combination of environmental and climatic factors affects tree growth and wood properties (Zobel, van Buijtenen 1989). Geographic factors (latitude, altitude, aspect and slope), climatic factors (temperature and humidity), biotic factors (humans, animals, plants and microorganisms) as well as soil properties can influence wood characteristics (Usta et al 2014;Kaygin et al 2016;Topaloglu et al 2016;Nazari et al 2020). Studies on the relationship between wood properties and ecological factors are of great importance in understanding wood applications as well as cre-https://doi.org/10.17221/125/2020-JFS ate a database for different wood species.…”

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confidence: 99%

Effect of site conditions on the properties of hawthorn (Crataegus azarolus L.) wood

Nazari¹,

Bahmani²,

Kahyani³

et al. 2021

J. For. Sci.

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This study investigated the influence of site conditions on the physical and morphological properties of hawthorn (Crataegus azarolus L.) wood grown in Zagros forests of Iran. Hawthorn is a valuable woody species in Iran’s Zagros forests with data deficiency in its wood properties. To our best knowledge, there is no study on the properties of hawthorn wood. Twenty-seven mature trees were randomly chosen and sampled at three altitude levels (1 800–2 000, 2 000–2 200, and 2 200–2 400 m) in the Bazoft region of Chaharmahal Va Bakhtiari, Iran. Dry wood density, volumetric shrinkage, fibre length, fibre diameter, cell wall thickness were then determined. Multivariate analysis of variance (MANOVA) was conducted to evaluate significant differences between the mean values of studied wood properties at different altitude levels and slope classes. Moreover, the relationships between the above-mentioned properties and some site conditions (temperature, precipitation, altitude, and slope) as well as growth parameters of trees (tree height, DBH, age, crown dimensions, volume, etc.) were studied by principal component analysis (PCA). The results indicated that trees growing at the second altitude level had the highest oven-dry density values, and those at the third altitude level had the lowest ones. Results also indicated a significant effect of altitude levels on fibre length, fibre diameter, and cell wall thickness. In contrast, a significant difference was found between the mean values of fibre diameter at different slope classes. PCA indicated that altitude, precipitation, and temperature are the most important environmental site variables affecting the wood characteristics.

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“…The same author studied the correlation between the position in the growth ring by radius and the wood fibre length and showed a functional quadratic dependence. In some studies (Mladenova et al, 2017;Nazari et al, 2020) fibre characteristics have been investigated, mainly fibre length in the wood of different oak species. The results showed a great dependence of its dimensions on location conditions.…”

Section: Resultsmentioning

confidence: 99%

Radial variability of wood density and fibre length in the red oak trees (Quercus rubra L.)

Todorović¹,

Živanović²,

Vilotić³

et al. 2022

Sustain Forestry

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Wood density and fibre length are two wood properties that are important in determining the quality of wood for commercial use. The fibre length of red oak has not been studied to the same extent as in other oak species. The aim of this paper is to explore the anatomical variation and wood density of red oak wood, as valuable information for researchers in other fields. Samples were taken in a 60-year-old red oak stand in the south part of Belgrade on the site of Stepin Lug. Along the south radius, the disc samples of 20 x 20 mm were cut from the sapwood, mature and juvenile wood. Ovendry density and fibre length were measured from the pith to the bark. According to the obtained data, the average oven-dry density of wood per radius is 0.694 g/cm3 . The lowest is in the juvenile wood and ranges from 0.628 to 0.681 g/cm3 , then in the part of sapwood - 0.662 g/cm3 , and the highest is in the mature wood where the density ranges from 0.707 to 0.740 g/cm3 . The presented values show certain differences, but also conform to literature data on the density of some industrial species from the genus Quercus L. The obtained results of the wood fibre length show that it varies from 0.99 to 1.33 mm which was measured in mature wood. The average length in a mature zone is 1.26 (1.16-1.33) mm, while in a juvenile area the average length is 1.02 (0.85-1.23) mm. Based on the known wood fibre length, it is possible to determine the density of red oak wood. In this research, a positive influence was determined in both parts of the tree, juvenile and mature, but a better mathematical dependence was obtained in the mature zone.

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Geographic Variations of the Wood Density and Fiber Dimensions of the Persian Oak Wood

Cited by 15 publications

References 30 publications

Genotype-environment interaction and stability of fiber properties and growth traits in triploid hybrid clones of Populus tomentosa

Genotype-environment interaction and stability of fiber properties and growth traits in triploid hybrid clones of Populus tomentosa

Effect of site conditions on the properties of hawthorn (Crataegus azarolus L.) wood

Radial variability of wood density and fibre length in the red oak trees (Quercus rubra L.)

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