Preliminary evaluation of anatomical characteristics of four common Mongolian softwoods

Sarkhad Murzabyek,Ishiguri Futoshi,Nezu Ikumi,Aiso Haruna,Ngadianto Agus,Tumenjargal Bayasaa,Baasan Bayartsetseg,Chultem Ganbaatar,Ohshima Jyunichi,Yokota Shinso 한국산림과학회 2022 Forest Science And Technology Vol.18 No.3

To effectively and sustainably utilize wood resources from boreal forests in Mongolia, ana- tomical characteristics, tracheid morphology, cell proportion, annual ring width, and late- wood percentage were preliminary determined in Pinus sylvestris, Pinus sibirica, Picea obovata,andLarix sibirica trees naturally growing in Mongolia. Based on the observation, the anatomical characteristics of four common Mongolian softwoods were the same as those previously observed in the same species or the same genus species. Based on the parame- ters of the Gompertz functions for annual ring width, silvicultural management, such as thin- ning timing and harvesting age, should be considered depending on the species when the plantation is established. The results of the model selection for relationships between late- wood percentage and basic density indicated that the increase ratio of basic density corre- sponded to an increase of latewood percentage is almost the same irrespective of species, although there are species-specific values of basic density corresponding to specific late- wood percentages. The results obtained in the present study contribute effective and sus- tainable utilization of wood resources from Mongolian forestry.

Anatomical Characteristics and Air-dry Density of Young Trees of Teak Clones Planted in Indonesia¹

Fanny Hidayati,Futoshi Ishiguri,Sri Nugroho Marsoem 한국목재공학회 2017 목재공학 Vol.45 No.4

The objectives of this study are to obtain the basic knowledge of anatomical characteristics and wood proper-ties of thinning trees of young teak (Tectona grandis L.F.) for fulfill the timber demand in Indonesia. Nine thin-ning trees of 5-year-old teak clone trees were used for analyzing the cell morphology and air-dry density. Vessel diameters in pore and outer pore zones were 165 and 90 μm, respectively. Mean value of fiber diameter, cell wall thickness, and fiber length in outer pore zone were 14.6 μm, 2.07 μm, and 1.04 mm, respectively. In addition, mean value of air-dry density was 0.55 g/cm³. The measurement and values of vessel diameter, fiber diameter, cell wall thickness, fiber length and air-dry density in the experimental had lower than those in the older teak. Therefore, it could be suggested that the wood from thinning young teaks was not appropriate as construction material, but it could be used for furniture which do not need high of strength properties. Furthermore, since the measurements values of anatomical characteristics were still increasing from pith to bark, it could be suggested that 5-year-old teak clones are still in a juvenile phase. Positively significant correlations were found between air-dry density and cell wall thickness, indicating that cell wall thickness is strongly correlated with wood density of teak.

Radial variation of bending property in plantation grown Acacia auriculiformis in Bangladesh

Md. Qumruzzaman Chowdhury,Nobuo Yoshizawa,Futoshi Ishiguri,Tokiko Hiraiwa,Yuya Takashima,Kazuya Iizuka,Shinso Yokota 한국산림과학회 2012 Forest Science And Technology Vol.8 No.3

Acacia auriculiformis is one of the major fast-growing plantation species in Bangladesh. Understanding the radial variation of bending property has importance in tree improvement and wood utilization. In this study, the radial variation of modulus of elasticity (MOE) and modulus of rupture (MOR) in static bending were examined in 11-year-old plantation-grown Acacia auriculiformis from Bangladesh. MOE and MOR increased up to about 6 and 8 cm radial distance from the pith, respectively, and then both properties were nearly stable toward the bark. MOE did not show significant correlation with air-dried density. Conversely, MOR showed significant correlation with airdried density. Significant variation among the trees indicates that the air-dried density and MOR could be used in plus tree selection for wood quality improvement of this species through tree breeding.

In vitro plantlet regeneration of ‘‘dwarf’’ Indian olive (Elaeocarpus robustus Roxb.): a fruit plant of Bangladesh

Md. Mahabubur Rahman,Muhammad Nurul Amin,Futoshi Ishiguri,Shinso Yokota,Rubaiyat Sharmin Sultana,Yuya Takashima,Kazuya Iizuka,Nobuo Yoshizawa 한국식물생명공학회 2009 Plant biotechnology reports Vol.3 No.3

A plantlet regeneration protocol was developed on pot-grown mature plants of Elaeocarpus robustus Roxb. cv. Dwarf from nodal and leaf explants. The best yield of adventitious shoots was achieved from the leaf-derived calli in a modified MS (MMS1, half strength of major salts, full strength of minor salts, and vitamins) medium containing 4.0 lM BA ? 4.0 lM Kn ? 0.5 lM NAA ? 15% coconut water (CW). The shoot multiplication rate was amplified about twofold per culture after the addition of 15% CW to the medium. The rate of shoot multiplication reached maximum at the 5th subculture, and it maintained this rate throughout the 3 subsequent subcultures. The best rooting in vitro was investigated by subculturing the microcuttings in an MMS2 (half strength of both major salts and minor salts and full strength of vitamins) medium containing 1.0 lM IBA in the dark for one initial week at 30C, followed by subculturing them in a plant-growth regulator (PGR)-free medium in the light. The plantlets raised in vitro were successfully established under ex vitro conditions. A plantlet regeneration protocol was developed on pot-grown mature plants of Elaeocarpus robustus Roxb. cv. Dwarf from nodal and leaf explants. The best yield of adventitious shoots was achieved from the leaf-derived calli in a modified MS (MMS1, half strength of major salts, full strength of minor salts, and vitamins) medium containing 4.0 lM BA ? 4.0 lM Kn ? 0.5 lM NAA ? 15% coconut water (CW). The shoot multiplication rate was amplified about twofold per culture after the addition of 15% CW to the medium. The rate of shoot multiplication reached maximum at the 5th subculture, and it maintained this rate throughout the 3 subsequent subcultures. The best rooting in vitro was investigated by subculturing the microcuttings in an MMS2 (half strength of both major salts and minor salts and full strength of vitamins) medium containing 1.0 lM IBA in the dark for one initial week at 30C, followed by subculturing them in a plant-growth regulator (PGR)-free medium in the light. The plantlets raised in vitro were successfully established under ex vitro conditions.

Variations in Growth Characteristics and Stress-wave Velocities of Zelkova serrata Trees from Eight Half-sib Families Planted in Three Different Initial Spacings

Prasetyo, Agung,Endo, Ryota,Takashima, Yuya,Aiso, Haruna,Hidayati, Fanny,Tanabe, Jun,Ishiguri, Futoshi,Iizuka, Kazuya,Yokota, Shinso Institute of Forest Science 2015 Journal of Forest Science Vol.31 No.3

Zelkova serrata is an important hardwood species for the timber industry in Japan. Tree breeding programs for this species have mainly focused on growth characteristics such as stem diameter (D), tree height (TH), stem form, and branching. In order to fulfill timber industry needs, wood quality improvement should be included in the tree breeding program of this species. In the present study, growth characteristics, such as D and TH, and the stress-wave velocity (SWV), which is highly correlated with Young's modulus of wood, were measured for 20-year-old Z. serrata from eight half-sib families planted in a progeny test site with three different initial spacings. Significant differences in all the measured characteristics were found among the eight half-sib families. The variance components of the half-sib families for D, TH, and SWV were 27.2%, 47.3%, and 33.5%, respectively. These results indicate that all the measured characteristics of this species could be improved by tree breeding programs. In addition, only low correlation coefficients were obtained between the growth characteristics and SWV, indicating that extensive selection on SWV in tree breeding programs may not always lead to a reduction in yield volume.

Investigating the Anatomical and Physical-Mechanical Properties of the 8-Year-Old Superior Teakwood Planted in Muna Island, Indonesia

( Alvin Muhammad Savero ),( Imam Wahyudi ),( Istie Sekartining Rahayu ),( Andi Detti Yunianti ),( Futoshi Ishiguri ) 한국목재공학회 2020 목재공학 Vol.48 No.5

Muna teakwood, especially from old stands, has been popular as raw material for timber industries in Indonesia for the past ten decades. Due to the scarcity of this wood, superior-grown seedlings of Muna teakwood have been developed and widely planted. Since there is no information on its characteristics, therefore, the aim of this research was to investigate wood characteristics of the 8-year-old superior-grown teak from Muna Island to ensure their proper utilization as raw material for wooden furniture. Wood discs and boards from basal area of three different trees were used as the samples. Macroscopic and microscopic anatomical characteristics were observed following the IAWA's list, while their physicalmechanical properties were measured following British Standard 373-57. Results showed that anatomical characteristics of this wood sample are similar to regular teakwood, but its heartwood portion is higher. Differences among trees are found in regards to wood texture, growth ring width, as well as early and latewood portion. The green moisture content was lower than that of fast-growing teak of a similar age. The wood is more stable than the old teakwood, but its specific gravity is lower. In general, mechanical properties of this wood were higher than those of the regular fast-growing teakwood, but lower than the old one. Based on its specific gravity, this superior Muna teakwood was categorized as a Strength Class of III. The wood is suitable enough for wooden furniture manufacturing.

Variations in Growth Characteristics and Stress-wave Velocities of Zelkova serrata Trees from Eight Half-sib Families Planted in Three Different Initial Spacings

Agung Prasetyo,Ryota Endo,Yuya Takashima,Haruna Aiso,Fanny Hidayati,Jun Tanabe,Futoshi Ishiguri,Kazuya Iizuka,Shinso Yokota 강원대학교 산림과학연구소 2015 Journal of Forest Science Vol.31 No.3

Zelkova serrata is an important hardwood species for the timber industry in Japan. Tree breeding programs for this species have mainly focused on growth characteristics such as stem diameter (D), tree height (TH), stem form, and branching. In order to fulfill timber industry needs, wood quality improvement should be included in the tree breeding program of this species. In the present study, growth characteristics, such as D and TH, and the stress- wave velocity (SWV), which is highly correlated with Young’s modulus of wood, were measured for 20-year-old Z. serrata from eight half-sib families planted in a progeny test site with three different initial spacings. Significant differences in all the measured characteristics were found among the eight half-sib families. The variance components of the half-sib families for D, TH, and SWV were 27.2%, 47.3%, and 33.5%, respectively. These results indicate that all the measured characteristics of this species could be improved by tree breeding programs. In addition, only low correlation coefficients were obtained between the growth characteristics and SWV, indicating that extensive selection on SWV in tree breeding programs may not always lead to a reduction in yield volume.