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... Background and Aims When the orientation of the stems of conifers departs from the vertical as a result of environmental influences, conifers form compression wood that results in restoration of verticality. It is well known that intercellular spaces are formed between tracheids in compression wood, but the function of these spaces remains to be clarified. In the present study, we evaluated the im ...
... Premise of the study: Although several microsatellite markers of Chamaecyparis obtusa (Cupressaceae) have been reported in previous studies, we newly developed and evaluated polymorphic microsatellite markers of C. obtusa, an economically important species in Korea as a major forestation tree species, for further genetic studies.Methods and Results: Microsatellite-enrichment libraries were constru ...
Chamaecyparis obtusa; Cryptomeria japonica; chemical bonding; dissociation; glucosides; image analysis; matrix-assisted laser desorption-ionization mass spectrometry; moieties; osmium; softwood; sucrose; tree physiology; vapors; xylem
Abstract:
... Matrix-assisted laser desorption/ionization mass spectrometric imaging (MALDI-MSI) was employed to detect monolignol glucosides in differentiating normal and compression woods of two Japanese softwoods, Chamaecyparis obtusa and Cryptomeria japonica. Comparison of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry collision-induced dissociation fragmentation analysis and s ...
... The objective of this study was to investigate plant growth and nutrient uptake of Chamaecyparis obtusa seedlings with heavy fertilization treatment depending on previous fertilization experience. In a previous year, one-year-old Chamaecyparis obtusa seedlings were planted at a nursery with two levels of fertilization: the first group was fertilized with a mixed nitrogen–phosphorus (N-P) fertilize ...
Chamaecyparis obtusa; aluminum; ammonium nitrogen; biomass; buffering capacity; bulk density; cations; chemical bases; correlation; fine roots; forest soils; forests; nitrate nitrogen; nitrates; nitrogen; respiratory rate; soil acidification; soil properties; East Asia
Abstract:
... KEY MESSAGE : The biomass, morphology, and respiration of the fine roots of Chamaecyparis obtusa did not change between different soil acid buffering capacities. Soil nitrate has noticeable effects on morphology and respiration. Low soil acid buffering capacity (ABC) accelerates soil acidification because of the lower concentrations of base cations (BC) and higher concentrations of aluminum (Al) p ...
... Forecasts of prices can help industries in their risk management. This is especially true for Japanese logs, which experience sharp fluctuations in price. In this research, the authors used an exponential smoothing method (ETS) and autoregressive integrated moving average (ARIMA) models to forecast the monthly prices of domestic logs of three of the most important species in Japan: sugi (Japanese ...
Chamaecyparis obtusa; buried seeds; canopy; mixed forests; plantations; seed dispersal; seedlings; species recruitment; stems; surveys; transmittance; trees; understory; Japan
Abstract:
... Heavy thinning may provide a feasible means to convert single-species coniferous plantations to broadleaved or mixed forests. To assess this possibility, we monitored tree seedling dynamics of other tree species, the understory microenvironment, and seed availability following heavy thinning (50 % by volume) in two hinoki (Chamaecyparis obtusa) plantations in Shikoku, southwestern Japan. Conventio ...
... As a part of improving forest management practices, we tested the idea that partial defoliation of container-grown and bare-root Hinoki cypress (Chamaecyparis obtusa) seedlings prior to outplanting can reduce transplant shock and enhance seedling survival during their first growing season after transplanting. For container-grown seedlings, the remaining leaves of defoliated seedlings showed photos ...
... The secondary cell wall of compression wood tracheids has a highly lignified region (S2L) in its outermost portion. To better understand the mechanism of S2L formation, we focussed on the activity of laccase (a monolignol oxidase) and performed in situ studies of this enzyme in differentiating compression wood. Staining of differentiating compression wood demonstrated that laccase activity began i ...
... Biochar (BC), charcoal produced through the pyrolysis of biomass, is reported to adsorb dissolved nitrate-nitrogen (NO ₃-N). The NO ₃-N adsorption properties of BC differ depending on the feedstock and the pyrolysis conditions, and the influences have not been systematically clarified. Therefore, we evaluated the dependence of feedstock and pyrolysis temperature on the NO ₃-N adsorption properties ...
... Background and Aims In temperate regions, trees undergo annual cycles of cambial growth, with periods of cambial activity and dormancy. Environmental factors might regulate the cambial growth, as well as the development of cambial derivatives. We investigated the effects of low temperature by localized cooling on cambial activity and latewood formation in two conifers, Chamaecyparis obtusa and Cry ...
Chamaecyparis obtusa; Cryptomeria japonica; Ursus thibetanus; bark; conifers; forest management; foresters; forests; growth rings; managers; models; plantations; temporal variation; tree damage; tree trunk; trees; Japan
Abstract:
... Bark stripping by Asiatic black bears (Ursus thibetanus) has a serious impact on conifer plantations in Japan, resulting in physical damage to the tree trunks and reduction of the value of the timber. The aim of this study was to clarify whether these plantations are more prone to damage by bears at particular times and sites, to more effectively prevent this damaging behavior. The study was condu ...
... We examined changes in suspended-sediment yields (SSY) after a 50 % strip thinning in headwater streams draining a Japanese cedar (Cryptomeria japonica) and cypress (Chamaecyparis obtusa) plantation forest. We applied a paired-catchment analysis to treated (K T : 17.1 ha) and control (K C : 8.9 ha) catchments. Annual suspended-sediment yield (SSYₐₙ) in the prethinning period in the K T and K C cat ...
... Chamobtusin A, a unique diterpene alkaloid isolated from Chamaecyparis obtusa cv. tetragon, is considered to be biosynthesized from an abietane diterpenoid. On the basis of this biosynthetic hypothesis, ferruginol (15) was synthesized from (+)-dehydroabietylamine and then biomimetically transformed into (−)-chamobtusin A in 6 steps (12 steps from (+)-dehydroabietylamine). ...
basins; canopy; solar radiation; soil water content; stems; forest litter; models; lysimeters; environmental factors; evaporation; soil water; forest thinning; vapor pressure; Chamaecyparis obtusa; hydrologic cycle; forests; Japan
Abstract:
... Thinning results in more open-stand canopies and then immediately modifies the environmental factors that influence forest floor evaporation (Ef). Thus, the changes in Ef induced by thinning would play an important role in the forest water cycle, whereas few studies have reported this topic. This study analyzes the effect of strip thinning on Ef, its spatial variation and identifies the factors in ...
... Chamaecyparis obtusa essential oil (COE) has been widely used to treat allergic diseases and was suggested to exert anti-inflammatory, antioxidant, and antimicrobial effects. This study evaluated the effects of COE on pain-related behavior and pro-inflammatory cytokines in rats with carrageenan (CGN)-induced arthritis. Reduced dynamic weight load on inflamed joint in voluntarily walking rats was u ...