| [studies on the constituents of quercus spp. vi. triterpenes of quercus glauca thunb., structure of cyclobalanone]. | | 1976 | 1033998 |
| superoxide anion scavenge effect of quercus glauca thunb. in whole blood of patients with ankylosing spondylitis. | nine phenolic compounds, catechin (1), epicatechin (2), gallocatechin (3), epigallocatechin (4), procyanidin b-4 (5), catechin-3-o-rhamnoside (6), rutin (7), querglanin (8) and isoquerglanin (9) were isolated from oak leaves (quercus glauca thunb. fagaceae), and the latter two (8, 9) were identified as new compounds. several quercus species have been used in folk medicine as an astringent for hemorrhoids and for treatment of inflammation, jaundice, and tumor. in this study, these compounds were ... | 1997 | 9358904 |
| [bioproductivity of castanopsis hysrix-cyclobalanopsis glauca-machilus pauhoi community in huitong, hunan]. | based on the mean dbh measurements of sample trees, the bioproductivity of subtropical castanopsis hysrix-cyclobalanopsis glauca-machilus pauhoi community in huitong, hunan province was studied by regression analysis (y = a(d2.h)b). the results showed that the total biomass of the forest was 451.02 t.hm-2, and the component biomass of tree, shrub, liana and litter layer was 426.76, 17.76, 1.80 and 4.70 t.hm-2, respectively. the net production and average production of tree layer were 34.46 and 1 ... | 2000 | 11767514 |
| spatial pattern of chloroplast dna variation of cyclobalanopsis glauca in taiwan and east asia. | this study examined the spatial pattern of chloroplast dna (cpdna) variation in cyclobalanopsis glauca (thunb. ex murray) oerst. (fagaceae) in 140 trees from taiwan (25 populations), japan (three), ryukyus (two), hong kong (one) and mainland china (one). by sequencing three cpdna intergenic spacer fragments using universal primers (trnt-trnl, trnv-trnm, including the trnv intron, and petg-trnp), we found a total of 1,980 bp and 15 polymorphic sites. among them, 12 sites were caused by point muta ... | 2002 | 12406245 |
| evidence for the existence of some dissociation in an otherwise strong linkage disequilibrium between mitochondrial and chloroplastic genomes in cyclobalanopsis glauca. | variations in mitochondrial dna in cyclobalanopsis glauca (thunb. ex murray) oerst. were studied in 140 trees from 32 populations collected from within the tree's natural range. by sequencing two mitochondrial dna intron fragments (nad4/3-nad4/4r and nad7/2-nad7/3r), we revealed a total of 1788 bp and five polymorphic sites which allowed us to distinguish six mitotypes. the mitochondrial dna markers provided replicated data to support population phylogeographical scenarios suggested previously u ... | 2003 | 12969469 |
| relationships between light, leaf nitrogen and nitrogen remobilization in the crowns of mature evergreen quercus glauca trees. | we estimated the amount of nitrogen (n) remobilized from 1-year-old leaves at various positions in the crowns of mature quercus glauca thunb. ex murray trees and related this to the production of new shoots. leaf n concentration on an area basis (na) and total n (nt= na x lamina area of all leaves on a shoot) were related to photosynthetic photon flux (ppf) on the leaves of current-year and 1-year-old shoots. when new shoots (s02 shoots; flushed in 2002) flushed, only a portion of the leaves on ... | 2004 | 15294762 |
| potential refugia in taiwan revealed by the phylogeographical study of castanopsis carlesii hayata (fagaceae). | in this study, we examined spatial patterns of chloroplast dna (cpdna) variation in a total of 30 populations of castanopsis carlesii hayata (fagaceae), a subtropical and temperate tree species, including 201 individuals sampled throughout taiwan. by sequencing two cpdna fragments using universal primers (the trnl intron and the trnv-trnm intergenic spacer), we found a total of 1663 bp and 21 polymorphic sites. these gave rise to a total of 28 cpdna haplotypes. the level of differentiation among ... | 2005 | 15910328 |
| [understory vegetation composition and main woody population niche of artificial masson pine forest in south subtropical area]. | this paper studied the characteristics of the natural understory vegetation in the artificial masson pine forest replanted after chinese fir cut for 13 years. the results indicated that there were 100 species of understory vegetation, including 74 species of shrub or small arbor, accounting for 74.0% of the total species, belonging to 41 faculties and 63 categories, and 26 herbs belonging to 14 faculties and 23 categories. the tropical and subtropical elements were dominant in the vegetation, wh ... | 2005 | 16355802 |
| physiological basis of seasonal trend in leaf photosynthesis of five evergreen broad-leaved species in a temperate deciduous forest. | the physiological basis of photosynthesis during winter was investigated in saplings of five evergreen broad-leaved species (camellia japonica l., cleyera japonica thunb., photinia glabra (thunb.) maxim., castanopsis cuspidata (thunb.) schottky and quercus glauca thunb.) co-occurring under deciduous canopy trees in a temperate forest. we focused on temperature dependence of photosynthetic rate and capacity as important physiological parameters that determine light-saturated rates of net photosyn ... | 2006 | 16356922 |
| the bulk elastic modulus and the reversible properties of cell walls in developing quercus leaves. | we examined the relationship between the bulk elastic modulus (epsilon) of an individual leaf obtained by the pressure-volume (p-v) technique and the mechanical properties of cell walls in the leaf. the plants used were quercus glauca and q. serrata, an evergreen and a deciduous broad-leaved tree species, respectively. we compared epsilon and young's modulus of leaf specimens determined by the stretch technique at various stages of their leaf development. the results showed that epsilon increase ... | 2006 | 16571617 |
| source populations of quercus glauca in the last glacial age in taiwan revealed by nuclear microsatellite markers. | in this work, we attempted to study genetic differentiation between populations of quercus glauca in taiwan using nuclear microsatellite markers to infer the potential refugium in the last glaciation stage. four microsatellite loci for 20 individuals each in 10 populations of taiwan were analyzed. we found that q. glauca has relatively high within-population diversity (h(e) = 0.741) and low population differentiation (f(st) = 0.042) but shows isolation by distance. the most divergent populations ... | 2006 | 16614134 |
| seasonal fluctuations and temperature dependence of leaf gas exchange parameters of co-occurring evergreen and deciduous trees in a temperate broad-leaved forest. | seasonal fluctuations in leaf gas exchange parameters were investigated in three evergreen (quercus glauca thunb., cinnamomum camphora sieb. and castanopsis cuspidata schottky) and one deciduous (quercus serrata thunb.) co-occurring, dominant tree species in a temperate broad-leaved forest. dark respiration rate (rn), maximum carboxylation rate (vcmax) and stomatal coefficient (m), the ratio of stomatal conductance to net assimilation rate after adjustment to the vapor pressure deficit and inter ... | 2006 | 16740493 |
| conservative decrease in water potential in existing leaves during new leaf expansion in temperate and tropical evergreen quercus species. | this study aimed at clarifying how the water potential gradient (deltapsi) is maintained in the shoots of evergreen trees with expanding leaves, whose leaf water potentials at the turgor loss point (psi(tlp)) are generally high. | 2007 | 17855379 |
| biogenic volatile organic compound emission potential of forests and paddy fields in the kinki region of japan. | the standard biogenic volatile organic compound (bvoc) emissions from 10 japanese plant species (quercus serrata, quercus crispula, fagus crenata, quercus acutissima carruthers, quercus glauca, quercus myrsinaefolia, cryptomeria japonica, chamaecyparis obtusa, pinus densiflora, and rice [oryza sativa]) were measured. these species were selected due to their abundance in the estimated domain (47,000 km(2)) of the kinki region. bvoc emission experiments were conducted in a growth chamber where tem ... | 2008 | 18023428 |
| [seasonal variation of cyclobalanopsis glauca whole-tree transpiration in karst region]. | by using granier's sap-flow method, the variations of sap flux density and whole-tree transpiration of cyclobalanopsis glauca (syn. quercus glauca) on a hilly slope in the karst region of south china were studied, with their driving factors analyzed. the sap flux density (js) of c. glauca varied randomly with the diameter of breast height of individual trees, and its maximum occurred at 13:30-14:30. in a seasonal course, the daily js was the maximum (56.00 g h2o x m(-2) x s(-1)) in summer, and t ... | 2009 | 19459361 |
| hoarding decisions by edward's long-tailed rats (leopoldamys edwardsi) and south china field mice (apodemus draco): the responses to seed size and germination schedule in acorns. | co-varying traits in acorns such as seed size and germination schedule are important to influence the behavioural decisions of hoarding rodents. using acorn pairs from cork oak (quercus variabilis) (large size and short germination schedules) serrate oak (q. serrata) (small size and short germination schedule) and qinggang (cyclobalanopsis glauca) (small size and long germination schedule) with contrasting seed size and germination schedule, we conducted a series of experiments to investigate ho ... | 2009 | 19615609 |
| [litter decomposition of dominant plant species in successional stages in mid-subtropical zone]. | the litters of seven tree species representing the dominant plant species in three main successional stages in subtropical china, i.e., pinus massoniana in early successional forests, schima superba and cinnamanun camphora in transitional forests, and castanopsis eyeri, cyclobalanopsis gracilis, cyclobalanopsis glauca, and michelia chapensis in late successional forests, were collected, and their decomposition rates were measured with litterbags. the results showed that m. chapensls and c. graci ... | 2009 | 19637588 |
| [effects of different types of litters on soil organic carbon mineralization]. | using litter incubation experiment in laboratory, decomposition discrepancies of four typical litters from zijin mountain were analyzed. the results show that organic carbon mineralization rates of soil with litters all involve fast and slow decomposition stages, and the differences are that the former has shorter duration,more daily decomposition quantity while the latter is opposite. organic carbon mineralization rates of soil with litters rapidly reached maximum in the early days of incubatio ... | 2009 | 19662876 |
| [effects of simulated acid rain on quercus glauca seedlings photosynthesis and chlorophyll fluorescence]. | taking the seedlings of quercus glauca, a dominant evergreen broadleaf tree species in subtropical area, as test materials, this paper studied their photosynthesis, chlorophyll fluorescence, and chlorophyll content under effects of simulated acid rain with ph 2.5, 4.0, and 5.6 (ck). after 2-year acid rain stress, the net photosynthetic rate of q. glauca increased significantly with decreasing ph of acid rain. the acid rain with ph 2.5 and 4.0 increased the stomatal conductance and transpiration ... | 2009 | 20030127 |
| changes in the distribution of south korean forest vegetation simulated using thermal gradient indices. | to predict changes in south korean vegetation distribution, the warmth index (wi) and the minimum temperature of the coldest month index (mtci) were used. historical climate data of the past 30 years, from 1971 to 2000, was obtained from the korea meteorological administration. the fifth-generation national center for atmospheric research (ncar) /penn state mesoscale model (mm5) was used as a source for future climatic data under the a1b scenario from the special report on emission scenario (sre ... | 2010 | 20697868 |
| inhibition effects of the classical pathway complement of isolated compounds from quercus glauca. | species of the quercus species is an evergreen broadleaf tree found not only in korea but also in china, taiwan, and japan. quercus species is the most commonly occurring plant among the 50 native species of the family fagaceae in korea, china, and taiwan. quercus species have been used for diarrhea, dysentery, dermatitis, and hemorrhagia in korean folk medicine. the present study evaluated the anticomplement effect of constituents from quercus species (fagaceae) in classical pathway complement ... | 2010 | 21078772 |
| [total flavonoids and icariin contents of epimedium pubescens in different types of communities and their relationships with soil factors]. | epimedium pubescens and soil samples were collected from the betula albosinensis community (community i ), cyclobalanopsis glauca var. gracilis community (community ii), and cinnamomum longepaniculatum community (community iii) in tangjiahe nature reserve in august 2009, with the total flavonoids and icariin contents in e. pubescens samples measured by high performance liquid chromatography and uv-spectrophotometer, and the relationships between these contents and soil parameters analyzed. among ... | 2010 | 21328937 |
| [effects of extreme drought on plant species in karst area of guizhou province, southwest china]. | based on the investigation data of damaged vegetations in karst areas of guizhou province during the extreme drought in 2010, an investigation was made on the species composition, floristic composition, life form, leaf characteristics, and environmental conditions of drought-damaged plants at six sampling plots. at these plots, there were 31 plant species drought-damaged, among which, cunninghamia lanceolata, celastrus orbiculatus, rapanea neriifolia, myrsine semiserrata, cyclobalanopsis glauca, ... | 2011 | 21812284 |
| light acclimation potential and carry-over effects vary among three evergreen tree species with contrasting patterns of leaf emergence and maturation. | we compared light acclimation potential among three evergreen broadleaved species with contrasting patterns of shoot elongation, leaf emergence and leaf maturation. understory saplings were transferred to a high-light environment before bud break, grown for 13 months, and then transferred back to the understory to observe subsequent carry-over effects. acclimation potential was highest and sapling mortality was lowest for cinnamomum japonicum sieb. ex nakai. indeterminate growth and successive l ... | 2011 | 21868403 |
| changes in understory species occurrence of a secondary broadleaved forest after mass mortality of oak trees under deer foraging pressure. | the epidemic of mass mortality of oak trees by japanese oak wilt has affected secondary deciduous broadleaved forests that have been used as coppices in japan. the dieback of oak trees formed gaps in the crown that would be expected to enhance the regeneration of shade-intolerant pioneer species. however, foraging by sika deer cervus nippon has also affected forest vegetation, and the compound effects of both on forest regeneration should be considered when they simultaneously occur. a field stu ... | 2016 | 28028480 |