| three glycosylated polypeptides secreted by several embryogenic cell cultures of pine show highly specific serological affinity to antibodies directed against the wheat germin apoprotein monomer. | embryogenic tissues of pinus caribaea morelet var hondurensis produce extracellular proteins; among them germins have been identified. two-dimensional electrophoresis followed by electroblotting onto a polyvinylidene difluoride membrane allowed isolation and n-terminal amino acid sequencing of extracellular gp111, which is present within the five embryogenic cell lines studied. the amino acid sequence showed strong homologies with the sequences of germins deduced from cdna sequencing, starting a ... | 1995 | 7784502 |
| xylose-rich polysaccharides from the primary walls of embryogenic cell line of pinus caribaea. | embryogenic cell lines of pinus caribaea were isolated from somatic embryogenesis from zygotic embryos. previous studies showed that the proteins and glycoproteins were characteristic of the embryogenic state. in the present work we were seeking typical feature in the polysaccharide from the cell walls of embryogenic calli at nine days of culture. sequential extraction with water, ammonium oxalate, dimethyl sulfoxide, sodium borohydride and 4.3 m potassium hydroxide revealed that the extracted p ... | 1997 | 9283035 |
| biases associated with several sampling methods used to estimate abundance of ixodes scapularis and amblyomma americanum (acari: ixodidae). | several tick sampling methods were evaluated for ixodes scapularis say and amblyomma americanum (i.) in oak-dominated mixed hard-wood, pitch pine-dominated, and mixed hardwood and pine forests in coastal new jersey. walking surveys were more efficient for collecting i. scapularis adults than dragging by a factor of > 2:1. in contrast, drag sampling yielded nearly twice as many a. americanum adults compared with walking surveys. i. scapularis subadults were rarely collected during walking surveys ... | 1997 | 9439115 |
| characterization of a germin-like protein gene expressed in somatic and zygotic embryos of pine (pinus caribaea morelet). | germin-like proteins (glps) ionically bound to the walls of preglobular somatic embryos of pinus caribaea morelet are markers of this early developmental stage. in order to reveal the physiological implications of such markers during early embryo development, we isolated a cdna clone from somatic embryos predicted to encode a protein with sequence similarity to glps. pcger1 has an open reading frame corresponding to a 220 amino acid polypeptide with a putative n-glycosylation site on asn-69. the ... | 1998 | 9869423 |
| inter-population differences in the essential oils of pinus caribaea needles. | differences in volatile terpene content of pinus caribaea needles and soil qualities between two pine plantations (uverito and sartenejas) in venezuela were analyzed. soils in the uverito pine plantation were sandy, low in nutritional quality, and deficient in available nitrogen and phosphorus content. pines grown on these soils presented in their needles higher concentrations of alpha-pinene, camphene, sabinene, myrcene+alpha-phellandrene mixture, beta-phellandrene, beta-caryophyllene, alpha-hu ... | 2000 | 10996258 |
| cloning of a pine germin-like protein (glp) gene promoter and analysis of its activity in transgenic tobacco bright yellow 2 cells. | germins and germin-like proteins (glps) constitute a large and highly diverse family of ubiquitous plant cell wall proteins. these proteins seem to be involved in many developmental stages and stress-related processes, but their exact participation in these processes generally remains obscure. in pinus caribaea morelet, the pcger1 gene is expressed uniquely in embryo tissues, and encodes a glp ionically bound to the walls of pine embryo cells maintained in 2,4-d-containing medium. we have cloned ... | 2003 | 12654044 |
| extraction and periodate cleavage studies of the tannin obtained from pinus caribaea, morelet. | | 1954 | 13142940 |
| composition of gum turpentines of pines. xxi. a report on pinus quadrifolia from southern california, pinus lumholtzii from durango, mexico, and pinus caribaea from nicaragua. | | 1954 | 13221492 |
| phosphate-limitation physiology in ectomycorrhizal pitch pine (pinus rigida) seedlings. | foliar and root p concentrations, net h(2)po(4) (-) (p(i)) uptake rates, and root surface acid phosphatase (apase) rates were assessed in pitch pine (pinus rigida mill.) seedlings inoculated with the ectomycorrhizal fungi laccaria bicolor (maire) pat., paxillus involutus (batsch.) fr., or pisolithus tinctorius (pers.) coker and couch, and grown at 10 or 100 micro m p(i) in sand culture. following a 6-week period of acclimation to the p(i) regimes, seedlings grown at 100 micro m p(i) had greater ... | 1996 | 14871791 |
| growth and nutrition of nonmycorrhizal and mycorrhizal pitch pine (pinus rigida) seedlings under phosphorus limitation. | the association of ectomycorrhizal fungi with tree roots enhances the acquisition of phosphorus (p) from the soil. in addition to increasing the uptake of h(2)po(4) (-) (p(i)), mycorrhizal fungi may increase the spectrum of p sources utilized by tree roots by mediating the dissolution of insoluble metallophosphate salts or the hydrolysis of organic p compounds. to investigate the role of ectomycorrhizal fungi in enhancing p acquisition by tree roots, pitch pine (pinus rigida mill.) seedlings wer ... | 1993 | 14969894 |
| influence of meso- and microscale habitat structure on focal distribution of sympatric ixodes scapularis and amblyomma americanum (acari: ixodidae). | we compared the distribution of sympatric ixodes scapularis say and amblyomma americanum (l.) within several suitable forested habitats at different spatial scales and characterized differences in microhabitat features accounting for the observed distribution of questing ticks. we used automatic data loggers placed in the shrub and litter layers to contrast mesoclimate and microclimate conditions experienced by questing ticks. larger numbers of i. scapularis were collected at sites where the for ... | 2005 | 15962776 |
| tannins from barks of pinus caribaea protect escherichia coli cells against dna damage induced by gamma-rays. | this work was aimed to evaluate genotoxicity and antigenotoxicity activity against gamma-rays of a tannin fraction obtained from barks of pinus caribaea, as well as to elucidate the antigenotoxic mechanisms involved in radioprotection by using different approaches as pre-, co- and post-irradiation cell treatments with plant extract. the tannin fraction was not genotoxic to escherichia coli cells in experiments using different exposure times. this extract was antigenotoxic against gamma-rays when ... | 2006 | 16439067 |
| increases in phosphorus requirements for co(2)-enriched pine species. | pinus radiata d. don (half-sib families 20010 and 20062) and pinus caribaea var hondurensis (an open-pollinated family) were grown for 49 weeks at seven levels of phosphorus and at co(2) concentrations of either 340 or 660 microliters per liter, to establish if the phosphorus requirements differed between the co(2) concentrations and if mycorrhizal associations were affected. when soil phosphorus availability was low, phosphorus uptake was increased by elevated co(2). this may have been related ... | 1990 | 16667414 |
| usefulness of the sos chromotest in the study of medicinal plants as radioprotectors. | the aim of this work is to investigate the usefulness of a modified protocol of the sos chromotest to detect antigenotoxicity activities against gamma-rays of plant extracts with proven antioxidant activity, and to elucidate the antigenotoxic mechanisms involved in radioprotection using this system. | 2006 | 16782649 |
| chronic gamma radiation affects the distribution of radial increment in pinus rigida stems. | exposure of pitch pine trees to chronic ionizing radiation at rates between 1 and 5 roentgens per day for several years causes reduction of radial increment throughout the stem, the reduction being most ponounced near the base of the tree. both the size of the tree crown and climate influence the severity of the effect, trees with large crowns showing little effect at low exposures except in years of environmental stress. | 1963 | 17772083 |
| woody species diversity influences productivity and soil nutrient availability in tropical plantations. | we investigated the relationship between plant diversity and ecological function (production and nutrient cycling) in tropical tree plantations. old plantations (65-72 years) of four different species, namely araucaria cunninghamii, agathis robusta, toona ciliata and flindersia brayleyana, as well as natural secondary forest were examined at wongabel state forest, in the wet tropics region of queensland, australia. two young plantations (23 years) of araucaria cunninghamii and pinus caribaea wer ... | 2007 | 17899202 |
| a preliminary phytochemical investigation of the tannin obtained from pinus caribaea morelet. | | 1949 | 18119731 |
| chemical composition changes in eucalyptus and pinus woods submitted to heat treatment. | this study investigated the influence of heat treatment on the chemical composition of eucalyptus saligna and pinus caribaea var. hondurensis woods to understand its role in wood processing. e. saligna and p. caribaea var. hondurensis woods were treated in a laboratorial electric furnace at 120, 140, 160 and 180 degrees c to induce their heat treatment. the chemical composition of the resulting products and those from original wood were determined by gas chromatography. eucalyptus and pinus show ... | 2008 | 18586488 |
| a preliminary pharmacological investigation of the tannin obtained from pinus caribaea, morelet. | | 1948 | 18889415 |
| decline and death of pinus spp. in delaware caused by bursaphelenchus xylophilus. | etiological studies to determine the cause of decline and death of pinus spp. in delaware were initiated in 1980. the pinewood nematode, bursaphelenchus xylophilus, was found to be the major canse of mortality in japanese black pine (pinus thunbergii). when inoculated into healthy 5-yr-old japanese black pines, b. xylophilus produced typical decline symptoms observed in the field. the xylophilous fungi most often associated with declining trees, rhizosphaera pini, fusarium spp., and pestalotia f ... | 1982 | 19295726 |
| biological activities of procyanidins from the bark of pinus caribaea morelet. | the extraction and biological activities of procyanidins from the bark of pinus caribaea morelet (p. caribaea) have been studied for the first time in our research. the main factors influencing the extraction, including solvent, temperature and liquid-to-solid (l/s) ratio, were discussed. the results illustrate that the suitable conditions for the extraction of procyanidins from the bark of p. caribaea are as follows: extraction temperature at 50 degrees c, l/s ratio at 11 : 1 and ethanol volume ... | 2009 | 19418352 |
| [substitution of native savanna by pinus caribaea (pinaceae) plantations in venezuela: effect on parameters that indicated changes in soil carbon content]. | a great extension (615,000 ha) of native savannas of the eastern plains of venezuela have been replaced by plantations of pinus caribaea var. hondurensis; however, only scarce information exists about the impact of this land use on carbon dynamics in soils. we studied the effect of temporal variability and the substitution on the total organic carbon (toc), water-soluble carbon (wsc), microbial biomass c (cmic), basal respiration (br), microbial metabolic quotient (qco2) and cmic/corg ratio. sel ... | 2008 | 19419100 |
| ectomycorrhizal responses to organic and inorganic nitrogen sources when associating with two host species. | while it is established that increasing atmospheric inorganic nitrogen (n) deposition reduces ectomycorrhizal fungal biomass and shifts the relative abundances of fungal species, little is known about effects of organic n deposition. the effects of organic and inorganic n deposition on ectomycorrhizal fungi may differ because responses to inorganic n deposition may reflect c-limitation. to compare the effects of organic and inorganic n additions on ectomycorrhizal fungi, and to assess whether ho ... | 2009 | 19465124 |
| larvicidal effect of dried leaf extracts from pinus caribaea against aedes aegypti (linnaeus, 1762) (diptera: culicidae). | in this study, the larvicidal activity of dried leaf extracts from pinus caribaea morelet against aedes aegypti was evaluated for the first time. pinus caribaea extracts were obtained by macerating dried leaves in alkaline hydroethanol, ethanol and acetone solutions followed by evaporation under reduced pressure. the lignin content was quantified using the thioglycolic acid complexation method. lethality bioassays (lc(50) and lc(90)) were carried out in accordance with the recommendations of the ... | 2009 | 19802470 |
| organosolv pretreatment with various catalysts for enhancing enzymatic hydrolysis of pitch pine (pinus rigida). | three different types of catalysts were evaluated for organosolv pretreatment with pitch pine (pinus rigida). sulfuric acid, magnesium chloride, and sodium hydroxide for acid, neutral and base catalysts, respectively, were used, and ethanol was the organic solvent. the pretreatment process was conducted at different temperatures and times. the enzymatic hydrolysis process followed to estimate the digestibility of the biomass. the digestibility of pitch pine by pretreatment process with 1% sulfur ... | 2010 | 20435474 |
| [fungal and bacterial biomass as indicators of soil c sequestration in savannas soils substituted by pine plantations]. | a transformation of any natural ecosystem to an agricultural or forest system leads to an important soil modification, not only in the total carbon pool, but also in the carbon associated to the microbial biomass. this way, carbon quantification on soil quality is important for the determination of impacts of agricultural practices and land use changes. the aim of this study was to the determine, through the selective inhibition technique, the fungal and bacterial biomass, and fungal-to-bacteria ... | 2010 | 20737850 |
| sources of variation in growth, form, and survival in dwarf and normal-stature pitch pines (pinus rigida, pinaceae) in long-term transplant experiments. | determining the relative contributions of genetic and environmental factors to phenotypic variation is critical for understanding the evolutionary ecology of plant species, but few studies have examined the sources of phenotypic differentiation between nearby populations of woody plants. we conducted reciprocal transplant experiments to examine sources of variation in growth rate, form, survival, and maturation in a globally rare dwarf population of pitch pine (pinus rigida) and in surrounding p ... | 2006 | 21642178 |
| microaerobic conversion of xylose to ethanol in recombinant saccharomyces cerevisiae sx6(mut) expressing cofactor-balanced xylose metabolic enzymes and deficient in ald6. | xylose is a major monosugar in cellulosic biomass and should be utilized for cost-effective ethanol production. in this study, xylose-converting ability of recombinant saccharomyces cerevisiae sx6(mut) expressing nadh-preferring xylose reductase mutant (r276h) and other xylose-metabolic enzymes, and deficient in aldehyde dehydrogenase 6 (ald6p) were characterized at microaerobic conditions using various sugar mixtures. the reduction of air supply from 0.5vvm to 0.1vvm increased specific ethanol ... | 2016 | 27059482 |
| using electrical resistivity tomography to differentiate sapwood from heartwood: application to conifers. | estimating sapwood area is one of the main sources of error when upscaling point scale sap flow measurements to whole-tree water use. in this study, the potential use of electrical resistivity tomography (ert) to determine the sapwood-heartwood (sw-hw) boundary is investigated for pinus elliottii engelm var. elliottii × pinus caribaea morelet var. hondurensis growing in a subtropical climate. specifically, this study investigates: (i) how electrical resistivity is correlated to either wood moist ... | 2013 | 23329335 |