| foliar temperature-respiration response functions for broad-leaved tree species in the southern appalachians. | we measured leaf respiration in 18 eastern deciduous forest tree species to determine if there were differences in temperature-respiration response functions among species or among canopy positions. leaf respiration rates were measured in situ and on detached branches for acer pensylvanicum l., a. rubrum l., betula spp. (b. alleghaniensis britt. and b. lenta l.), carya glabra (mill.) sweet, cornus florida l., fraxinus spp. (primarily f. americana l.), liriodendron tulipifera l., magnolia fraseri ... | 1999 | 10562404 |
| ice storm damage and early recovery in an old-growth forest. | we quantified the damage caused by a major ice storm to individual trees in two 1-ha permanent plots located at mont st. hilaire in southwestern québec, canada. the storm, which occurred in january 1998, is the worst on record in eastern north america; glaze ice on the order of 80-100 mm accumulated at our study site. all but 3% of the trees (dbh > or = 10 cm) lost at least some crown branches, and 35% lost more than half their crown. damage to trees increased in the order: tsuga canadensis, bet ... | 2001 | 11339708 |
| component and whole-system respiration fluxes in northern deciduous forests. | we measured component and whole-system respiration fluxes in northern hardwood (acer saccharum marsh., tilia americana l., fraxinus pennsylvanica marsh.) and aspen (populus tremuloides michx.) forest stands in price county, northern wisconsin from 1999 through 2002. measurements of soil, leaf and stem respiration, stem biomass, leaf area and biomass, and vertical profiles of leaf area were combined with biometric measurements to create site-specific respiration models and to estimate component a ... | 2004 | 14996654 |
| characterization and complementation of a fus3/kss1 type mapk from tuber borchii, tbmk. | mitogen-activated protein kinases (mapk) are used by organisms to transduce extra cellular signals from the environment in cellular events such as proliferation and differentiation. in the present study, we have characterized the first mapk from the ectomycorrhizal fungus tuber borchii (tbmk) which belongs to the yerk1 (yeast extra cellular regulated kinase) subfamily. tbmk is present as a single copy in the genome and the codified protein was phosphorylated during the interaction with the host ... | 2006 | 16705420 |
| pharmacological evaluation of the anxiolytic and sedative effects of tilia americana l. var. mexicana in mice. | the anxiolytic and sedative effects of tilia americana l. var. mexicana (schltdl.) hardin inflorescence extracts and its acute toxicity were tested. sodium pentobarbital (sp)-induced hypnosis potentiation (spp), as well as ambulatory activity and anti-anxiety response in three different experimental models were evaluated with hexane and methanol extracts in mice. in order to determine the proper timing of assessments and to identify the most active extract, a 100mg/kg dosage of hexane, ethyl ace ... | 2007 | 16930893 |
| interannual consistency in canopy stomatal conductance control of leaf water potential across seven tree species. | we investigated interannual variability of canopy transpiration per unit ground area (e (c)) and per unit leaf area (e (l)) across seven tree species in northern wisconsin over two years. these species have previously been shown to be sufficient to upscale stand-level transpiration to the landscape level during one growing season. our objective was to test whether a simple plant hydraulic model could capture interannual variation in transpiration. three species, wetland balsam fir (abies balsame ... | 2007 | 17169902 |
| bioactivity-guided isolation of beta-sitosterol and some fatty acids as active compounds in the anxiolytic and sedative effects of tilia americana var. mexicana. | tilia species have been used as anxiolytics for many years. in a previous study anxiolytic-like effects of a hexane extract of tilia americana var. mexicana inflorescences were observed in experimental models in mice. to get additional insights into the neuroactive actions of this particular tilia species, in this study we report a bioactivity guided-fractionation of the extract and separation by column chromatographic methods to isolate three fatty acids and a triterpene identified as beta-sito ... | 2007 | 17823876 |
| sedative and anxiolytic efficacy of tilia americana var. mexicana inflorescences used traditionally by communities of state of michoacan, mexico. | increasing demand of herbal products acquired in stores and markets, as well as medicinal plants collected for personal consume are a known modern tendency. in this study, the ethnomedicinal use of tilia americana var. mexicana inflorescences as sedative and anxiolytic is reinforced by examinating inflorescences used by communities of the state of michoacan, mexico. | 2008 | 18242902 |
| flavonoids from tilia americana with anxiolytic activity in plus-maze test. | the aerial parts of tilia americana var. mexicana (schltdl) hardin (tiliaceae) have been widely used in mexican traditional medicine to relieve sleeplessness, headache, and nervous excitement. the anxiolytic effect of four extracts and several flavonoid fractions from the bracts of tilia americana subsp.mexicana, var. mexicana (schltdl) hardin or tilia mexicana (tiliaceae) was studied. administration of 100mg/kg of n-hexane, ethyl acetate, and aqueous extracts to elevated plus-maze (epm)-exposed ... | 2008 | 18539420 |
| antinociceptive activity of tilia americana var. mexicana inflorescences and quercetin in the formalin test and in an arthritic pain model in rats. | tilia species are well known around the world for their properties in traditional medicine. antinociceptive activity of hexane, methanol and aqueous extracts from tilia americana var. mexicana inflorescences was evaluated in the pain-induced functional impairment model in rats (pifir). a preliminar 300 mg/kg dosage of aqueous extracts i.p., but not the same dose of methanol or hexane extract, produced an antinociceptive response in rats similar to that of tramadol (17.8 mg/kg i.p.). a dose-respo ... | 2009 | 19027760 |
| hplc/ms analysis and anxiolytic-like effect of quercetin and kaempferol flavonoids from tilia americana var. mexicana. | around the world, tilia species have been used in traditional medicine for their properties as tranquilizer. furthermore, mexican species of tilia have been grouped as tilia americana var. mexicana, but their specific content in flavonoids is poorly described. in this study, inflorescences of mexican tilia were collected in three different regions of mexico to compare their flavonoid content and anxiolytic-like response. | 2010 | 19799990 |
| laboratory performance of two polyphagous invasive weevils on the predominant woody plant species of a northern hardwood community. | a complex of invasive weevils that consume roots as larvae and foliage as adults have become established in northern hardwood forests in north america. we evaluated adults of the two most prominent species, phyllobius oblongus and polydrusus sericeus, for longevity, foliage consumption, and egg production on several putative hosts commonly found in this ecosystem. adult pairs were monitored in no-choice laboratory assays for the duration of their lifespans on basswood, tilia americana, ironwood ... | 2010 | 22127174 |
| influences of a calcium gradient on soil inorganic nitrogen in the adirondack mountains, new york. | studies of the long-term impacts of acidic deposition in europe and north america have prompted growing interest in understanding the dynamics linking the nitrogen (n) and calcium (ca) cycles in forested watersheds. while it has been shown that increasing concentrations of nitrate (no3-) through atmospheric deposition or through nitrification can increase ca loss, the reciprocal effects of ca on n transformation processes have received less attention. we studied the influence of soil ca availabi ... | 2008 | 18839757 |
| ceratocystis tiliae sp. nov., a wound pathogen on tilia americana. | species in the north american clade (nac) of the ceratocystis fimbriata complex are mostly weak pathogens that infect native tree hosts through fresh wounds. isolations from discolored tissue of wounded tilia americana (basswood) in iowa and nebraska yielded a ceratocystis species that was similar to but distinct from isolates of c. variospora from other hosts. sequences of 28s rdna showed that isolates from basswood did not differ from c. variospora, but there were minor differences in its rdna ... | 2015 | 26240301 |
| seasonal effect on tree species classification in an urban environment using hyperspectral data, lidar, and an object- oriented approach. | the objective of the current study was to analyze the seasonal effect on differentiating tree species in an urban environment using multi-temporal hyperspectral data, light detection and ranging (lidar) data, and a tree species database collected from the field. two airborne imaging spectrometer for applications (aisa) hyperspectral images were collected, covering the summer and fall seasons. in order to make both datasets spatially and spectrally compatible, several preprocessing steps, includi ... | 2008 | 27879863 |
| differential gene expression during pre-symbiotic interaction between tuber borchii vittad. and tilia americana l. | ectomycorrhizal formation is a highly regulated process involving the molecular reorganization of both partners during symbiosis. an analogous molecular process also occurs during the pre-symbiotic phase, when the partners exchange molecular signals in order to position and prepare both organisms for the establishment of symbiosis. to gain insight into genetic reorganization in tuber borchii during its interaction with its symbiotic partner tilia americana, we set up a culture system in which th ... | 2004 | 15258696 |
| headspace solid-phase microextraction with gas chromatography and mass spectrometry in the investigation of volatile organic compounds in an ectomycorrhizae synthesis system. | ectomycorrhizae formation represents one of the most significant steps in the truffle life cycle and is determined by a complex molecular signaling between two symbionts. in order to understand the molecular pathway of ectomycorrhiza development, we focused on the signaling interaction between the ectomycorrhizal fungus tuber borchii vittad. and the tilia americana l. plant roots. the medium of a pre-symbiotic (t. americana-t. borchii) in vitro system was analysed by headspace solid-phase microe ... | 2004 | 14745771 |
| solid-phase microextraction gas chromatography/ion trap mass spectrometry and multistage mass spectrometry experiments in the characterization of germacrene d. | germacrene d is a vegetable pheromone utilized in interactions among organisms belonging to different species. for the first time, using solid-phase microextraction/gas chromatography/ion trap mass spectrometry, the presence of this compound was detected in an in vitro mycorrhizal synthesis system where the mycelium of the ectomycorrhizal fungus tuber borchii vittad. interacts with the plant tilia americana l. from this symbiosis, a new structure, called ectomycorrhiza, is formed where the two s ... | 2002 | 12489082 |
| isolation of fungal cellobiohydrolase i genes from sporocarps and forest soils by pcr. | cellulose is the major component of plant biomass, and microbial cellulose utilization is a key step in the decomposition of plant detritus. despite this, little is known about the diversity of cellulolytic microbial communities in soil. fungi are well known for their cellulolytic activity and mediate key functions during the decomposition of plant detritus in terrestrial ecosystems. we developed new oligonucleotide primers for fungal exocellulase genes (cellobiohydrolase, cbhi) and used these t ... | 2008 | 18408067 |
| spatial and temporal patterns of morel fruiting. | the biotic and abiotic factors conditioning morel fruit body production are incompletely known. we examined spatial and temporal patterns of morchella esculenta fruiting over five years in a wooded site in missouri, usa. fruiting onset was inversely correlated with spring air and soil temperatures, whereas abundance was positively correlated with rain events (>10mm) during the 30 d preceding fruiting. the two years with the greatest fruiting had the shortest fruiting seasons (6-7d). fruiting sea ... | 2007 | 17363234 |
| pharmacokinetic study of biotransformation products from an anxiolytic fraction of tilia americana. | an anxiolytic fraction of tilia americana standardized in tiliroside, rutin, quercitrin, quercetin glucoside, and kaempferol was obtained. after oral administration of the fraction, the above-mentioned flavonoids were not detected in plasma over 24 h. however, meta and para hydroxyphenylacetic acid and dihydroxyphenylacetic acid (m-hpaa, p-hpaa and dopac) were monitored. these are the biotransformation compounds of the aglycones of kaempferol and quercetin; these aglycones are products of the ot ... | 2017 | 28749448 |
| biochemical and molecular modulation of ccl4-induced peripheral and central damage by tilia americana var. mexicanaextracts. | around the world, species from the genus tilia are commonly used because of their peripheral and central medicinal effects; they are prepared as teas and used as tranquilizing, anticonvulsant, and analgesic agents. in this study, we provide evidence of the protective effects of organic and aqueous extracts (100 mg/kg, i.p.) obtained from the leaves of tilia americana var. mexicana on ccl4-induced liver and brain damage in the rat. protection was observed in the liver and brain (cerebellum, corte ... | 2017 | 28344485 |
| isolated coastal populations of tilia americana var. caroliniana persist long-term through vegetative growth. | sprouting in woody plant species allows for the long-term persistence of small, isolated populations experiencing changing environments and can preserve genetic diversity in these populations despite the infrequent recruitment of sexually produced individuals. we examined demographic data collected over a 10-yr period for tilia americana var. caroliniana populations in the context of genetic structure as an empirical case study of this concept. | 2016 | 27630119 |
| neuroprotective effects of tilia americana var. mexicana on damage induced by cerebral ischaemia in mice. | tilia americana var. mexicana (t. americana) is a plant widely used in mexico for its medicinal properties on the central nervous system. in the present study, we designed a protocol to investigate the neuroprotective effects of non-polar and polar extracts of t. americana on damage induced by cerebral ischaemia in mice. vehicle or extracts were administered immediately after ischaemia. functional neurological deficit, survival percentage and infarct area were determined in each experimental gro ... | 2016 | 26592749 |
| interactions of a standardized flavonoid fraction from tilia americana with serotoninergic drugs in elevated plus maze. | tilia americana var. mexicana (schltdl) hardin (tiliaceae) aerial parts (bracts and flowers) are used in the traditional mexican medicine to treat nervous disorders, as sedative and to treat insomnia. a fraction of this species called fc1 (organic fraction from this plant) was proposed, described as anxiolytic and characterized by the presence of flavonoids. in the present work, this fraction was standardized, and its interaction with different serotonergic drugs was tested. we used the elevated ... | 2015 | 25656001 |
| anticonvulsant and antioxidant effects of tilia americana var. mexicana and flavonoids constituents in the pentylenetetrazole-induced seizures. | tilia genus is commonly used around the world for its central nervous system properties; it is prepared as tea and used as tranquilizing, anticonvulsant, and analgesic. in this study, anticonvulsant activity of the tilia americana var. mexicana inflorescences and leaves was investigated by evaluating organic and aqueous extracts (100, 300, and 600 mg/kg, i.p.) and some flavonoids in the pentylenetetrazole-induced seizures in mice. moreover, antioxidant effect of these extracts and flavonoids was ... | 2014 | 25197430 |
| neuroprotective evaluation of tilia americana and annona diversifolia in the neuronal damage induced by intestinal ischemia. | tilia americana and annona diversifolia are plants widely distributed in mexico and sold in markets for their medicinal properties on the central nervous system (cns) including possible neuroprotection. pharmacological studies have corroborated cns activities due to flavonoid constituents, but evidence of their neuroprotector effects are lacking. this study was conducted to test aqueous and organic extracts of these two plants for neuroprotective effects in a novel experimental model of intestin ... | 2013 | 23739919 |
| winning and losing tree species of reassembly in minnesota's mixed and broadleaf forests. | we examined reassembly of winning and losing tree species, species traits including shade and fire tolerance, and associated disturbance filters and forest ecosystem types due to rapid forest change in the great lakes region since 1850. we identified winning and losing species by changes in composition, distribution, and site factors between historical and current surveys in minnesota's mixed and broadleaf forests. in the laurentian mixed forest, shade-intolerant aspen replaced shade-intolerant ... | 2013 | 23613911 |
| eriophyes species (acari: eriophyoidea) inhabiting lime trees (tilia spp.: tiliaceae)--supplementary description and morphological variability related to host plants and female forms. | three poorly known species of the subfamily eriophyinae living on tilia spp. (tiliaceae) are illustrated and supplementary descriptions are provided. two of them, eriophyes exilis (nalepa 1892) and eriophyes nervalis (nalepa 1918), were recorded both in vein angle galls on leaves of tilia platyphyllos scop. and in erinea on leaves of tilia tomentosa moench, tilia americana l. 'moltkei', tilia americana var. heterophylla (vent.) loudon, tilia cordata mill., tiliajaponica (miq.) simonk., tilia pet ... | 2013 | 26213770 |
| evaluation of visual and olfactory cues for sampling three thrips species (thysanoptera: thripidae) in deciduous forests of the northern united states. | the introduced basswood thrips, thrips calcaratus uzel pear thrips, taeniothrips inconsequens (uzel), and native basswood thrips, neohydatothrips tiliae (hood), form a thrips complex that attacks buds and foliage of basswood, tilia americana l., trees in the northern united states. we assessed the potential for exploiting visual and olfactory cues to monitor these forest thrips. we tested blue, green, red, white, and yellow for thrips' response to visual stimuli, and anisaldehyde, ethyl nicotina ... | 2003 | 12852616 |
| comparative study and molecular characterization of ectomycorrhizas in tilia americana and quercus pubescens with tuber brumale. | mycorrhizas of tuber brumale on quercus pubescens and tilia americana were obtained in vitro using micropropagated plantlets. mycelium pure cultures were used for inoculation. both the mycelium used for the inoculations, as well as the mycorrhizas which were obtained, were identified using several molecular approaches: analysis of the its region, polymerase chain reaction (pcr) specific primers and sequencing. the mycorrhizas were described from a morphological standpoint. some of their biometri ... | 2002 | 12423745 |
| american linden, tilia americana. | | 2002 | 12027081 |
| ethylene emission by a deciduous tree,tilia americana, in response to feeding by introduced basswood thrips,thrips calcaratus. | ethylene emission from excised and intact american basswood tissue was increased after seedlings were infested with the bud-feeding herbivore,thrips calcaratus. gas chromatographic analysis showed that thrips-infested tissue produced significantly more ethylene than mechanically damaged or control tissue. the possibility that thrips feeding enhances ethylene-mediated stress signals is discussed. | 1995 | 24234018 |
| temperature dependence of anaphase chromosome velocity and microtubule depolymerization. | the time course of chromosome movement and decay of half-spindle birefringence retardation in anaphase have been precisely determined in the endosperm cell of a plant tilia americana and in the egg of an animal asterias forbesi. for each species, the anaphase retardation decay rate constant and chromosome velocity are similar exponential functions of temperature. over the temperature range at which these cells can complete anaphase, chromosome velocity and retardation rate constant yield a posit ... | 1975 | 1238405 |
| mitosis in tilia americana endosperm. | the endosperm cells of the american basswood tilia americana are favorable experimental material for investigating the birefringence of living plant spindles and anaphase movement of chromosomes. the behavior of the chromosomes in anaphase and the formation of the phragmoplast are unique. the numerous (3 n equals 123), small chromosomes move in precise, parallel rows until midanaphase when they bow away from the poles. such a pattern of anaphase chromosome distribution has been described once be ... | 1975 | 1088927 |
| plastids in sieve elements and companion cells of tilia americana. | contrary to an earlier report, the sieve elements and companion cells of tilia americana contain plastids. in young sieve elements and companion cells the plastids contain a moderately electronopaque matrix and internal membranes; the latter are very numerous in the plastids of the sieve elements. plastids of mature sieve elements contain an electron-transparent matrix, apparently fewer internal membranes than the plastids of young elements, and a single starch grain each. the plastids of compan ... | 1971 | 24493047 |
| nuclear p protein in sieve elements of tilia americana. | | 1970 | 5411086 |