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Article
Effects of chronic endurance exercise training on serum 25(OH)D concentrations in elderly Japanese men
Higher levels of physical activity and cardiorespiratory fitness are positively related to serum 25-hydroxyvitamin D [25(OH)D] concentrations; however, the response of 25(OH)D concentrations to chronic enduran...
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Article
Tracheary elements that resemble secondary xylem in calli derived from the conifers, Torreya nucifera and Cryptomeria japonica
Differentiated cells were recognized in calli derived from needles of Torreya nucifera and in calli derived from immature zygotic embryos of Cryptomeria japonica. Some differentiated cells resembled tracheary ele...
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Article
Differences in the timing of cell death, differentiation and function among three different types of ray parenchyma cells in the hardwood Populus sieboldii × P. grandidentata
Differences in the timing of cell death, differentiation and function among three different types of ray parenchyma cells in the hardwood Populus sieboldii × P. grandidentata which form uniseriate and homocellula...
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Article
Radial variations in the anatomical characteristics and density of the wood of Acacia mangium of five different provenances in Indonesia
The anatomical characteristics and density of wood were examined in 23-year-old Acacia mangium trees that had been planted in Yogyakarta, Indonesia. The seeds had been collected from trees of five different prove...
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Article
Plant regeneration by somatic embryogenesis from mature seeds of Magnolia obovata
We attempted to develop a method for the regeneration of plantlets from mature seeds of medically important Magnolia obovata via the induction of somatic embryogenesis in vitro. We initially cultured halves of ma...
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Article
Polyamines promote the development of embryonal-suspensor masses and the formation of somatic embryos in Picea glehnii
Effects of polyamines on the development of embryonal-suspensor masses (ESMs) and the formation of somatic embryos were examined in an effort to improve the frequency of somatic embryogenesis in Picea glehnii. Ex...
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Article
Nuclear DNA fragmentation during cell death of short-lived ray tracheids in the conifer Pinus densiflora
One key event in the programmed cell death is nuclear DNA fragmentation. We investigated the timing of nuclear DNA fragmentation during the cell death of short-lived ray tracheids in Pinus densiflora using the te...
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Article
Cambial sensitivity to rising temperatures by natural condition and artificial heating from late winter to early spring in the evergreen conifer Cryptomeria japonica
Differences in the timing of cambial reactivation and the initiation of xylem differentiation in response to the sum of daily maximum temperatures were studied in two Cryptomeria japonica trees with cambium of di...
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Article
Morphological changes in the cytoskeleton, nuclei, and vacuoles during cell death of short-lived ray tracheids in the conifer Pinus densiflora
Morphological changes in the cytoskeleton, nuclei, and vacuoles were monitored during the cell death of short-lived ray tracheids in the conifer Pinus densiflora. After formation of the dentate thickenings that o...
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Article
Differences in patterns of cell death between ray parenchyma cells and ray tracheids in the conifers Pinus densiflora and Pinus rigida
Differences in patterns of cell death between ray parenchyma cells and ray tracheids in the conifers Pinus densiflora and Pinus rigida were clarified. Differentiation and cell death of ray tracheids occurred succ...
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Article
Gibberellin-induced formation of tension wood in angiosperm trees
After gibberellin had been applied to the vertical stems of four species of angiosperm trees for approximately 2 months, we observed eccentric radial growth that was due to the enhanced growth rings on the sid...
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Article
Relationships between vessel element anatomy and physiological as well as morphological traits of leaves in Fagus crenata seedlings originating from different provenances
We attempted to observe differences in vessel element anatomy, and physiological and morphological traits of leaves in Fagus crenata seedlings originated from seven different provenances grown under the uniform e...
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Article
Influence of osmotic pressure on somatic embryo maturation in Pinus densiflora
The effect of an osmoticum, polyethylene glycol (PEG), on somatic embryo production was examined using embryogenic cells of Pinus densiflora. In the basal medium containing 30 µM abscisic acid and 6% maltose, the...
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Article
The positional distribution of cell death of ray parenchyma in a conifer, Abies sachalinensis
We monitored the distribution of death of secondary xylem cells in a conifer, Abies sachalinensis. The cell death of tracheids, which are tracheary elements, occurred successively and was related to the distance ...
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Article
Bending creep performances of three-ply cross-laminated woods made with five species
To improve the performance of cross-laminated woods, 30 types of three-ply parallel-laminated and cross-laminated woods were prepared from five species with various densities and shear compliances in cross sec...
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Article
Effect of polyamines and L-ornithine on the development of proembryogenic masses of Cryptomeria japonica
We examined the effects of polyamines, namely, putrescine, spermidine and spermine, and of amino acids, such as l-arginine and l-ornithine, as part of our efforts to identify factors that stimulate the developmen...
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Article
Static bending strength performances of cross-laminated woods made with five species
Thirty types of three-ply parallel- and cross-laminated woods were prepared from five species, and their static bending strength performance were investigated. The modulus of elasticity (MOE), proportional lim...
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Article
Relationships between cambial activity, cell differentiation and the localization of starch in storage tissues around the cambium in locally heated stems of Abies sachalinensis (Schmidt) Masters
A study was made, in a cool-temperate zone, of the extent of cell division in the cambium, the extent of differentiation of cambial derivatives, and the localization of storage starch around the cambium in loc...
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Article
Changes in levels of endogenous plant hormones in cambial regions of stems ofLarix kaempferi at the onset of cambial activity in springtime
The total amounts of endogenous indole-3-acetic acid (IAA), cytokinins, and abscisic acid (ABA) were quantified by gas chromatography-selected ion monitoring-mass spectrometry (GC-SIM-MS) in cambial regions of...
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Article
Cambial reactivation in locally heated stems of the evergreen conifer Abies sachalinensis (Schmidt) Masters
A study was made of cambial activity, the localization of storage starch around the cambium, and the localization and occurrence of microtubules in cambial cells from dormancy to reactivation in locally heate...
