Publications

trace element availability and plant growth in a mine-spill-contaminated soil under assisted natural remediation ii. plants.	in this second part, we evaluated the effects of different amendments on plant growth (agrostis stolonifera l.), and trace element accumulation and removal by plants in a trace element (as, cd, cu, pb and zn) contaminated soil. description of the various treatments is given in part i of this work. the plants were grown for consecutive periods (2002, 2003, 2004), 5 months each and harvested twice in each period. results showed that plant growth was enhanced and trace element concentrations in pla ...	2006	16600330
effect of a copper gradient on plant community structure.	vegetation data including plant cover, biomass, species richness, and vegetation height was sampled on a copper-contaminated field with total copper contents varying from 50 to almost 3,000 mg/kg soil. the field was covered by early succession grassland dominated by agrostis stolonifera. plant cover, biomass, species richness, and vegetation height generally decreased with increasing copper content, although the highest biomass was reached at intermediate copper concentrations. multivariate stat ...	2006	16566159
root-associated n(2) fixation (acetylene reduction) by enterobacteriaceae and azospirillum strains in cold-climate spodosols.	n(2) fixation by bacteria in associative symbiosis with washed roots of 13 poaceae and 8 other noncultivated plant species in finland was demonstrated by the acetylene reduction method. the roots most active in c(2)h(2) reduction were those of agrostis stolonifera, calamagrostis lanceolata, elytrigia repens, and phalaris arundinacea, which produced 538 to 1,510 nmol of c(2)h(4).g (dry weight). h when incubated at po(2) 0.04 with sucrose (ph 6.5), and 70 to 269 nmol of c(2)h(4). g (dry weight).h ...	1981	16345687
identification of a gene in the process of being lost from the genus agrostis.	lineage-specific gene loss is considered one of the processes contributing to speciation and genome diversity. such gene loss has been inferred from interspecies comparisons of orthologous dna segments. examples of intraspecific gene loss are rare. here we report identification of a gene, designated crs-1 (creeping specific-1), that appears to be in the process of being lost from heterozygous populations of the species creeping bentgrass (agrostis stolonifera). the crs-1 gene encodes a protein w ...	2005	15995002
linkage map construction in allotetraploid creeping bentgrass (agrostis stolonifera l.).	creeping bentgrass (agrostis stolonifera l.) is one of the most adapted bentgrass species for use on golf course fairways and putting greens because of its high tolerance to low mowing height. it is a highly outcrossing allotetraploid species (2n=4x=28, a(2) and a(3) subgenomes). the first linkage map in this species is reported herein, and it was constructed based on a population derived from a cross between two heterozygous clones using 169 rapd, 180 aflp, and 39 heterologous cereal and 36 hom ...	2005	15981010
plant-specific responses to zinc contamination in a semi-field lysimeter and on hydroponics.	the species agrostis stolonifera, brassica napus and trifolium repens representing different ecological strategies, were selected to study the effect of zn contamination on zn tolerance, uptake and accumulation patterns. parallel tests were carried out with increasing concentrations of zn in a semi-field lysimeter and hydroponics in the climate chamber. a significant reduction in biomass production or root length and an increase in shoot zn concentration was observed for all species at increasin ...	2005	15939514
comparison of early development of three grasses: lolium perenne, agrostis stolonifera and poa pratensis.	to improve the management of grass communities, early plant development was compared in three species with contrasting growth forms, a caespitose (lolium perenne), a rhizomatous (poa pratensis) and a caespitose-stoloniferous species (agrostis stolonifera).	2005	15932884
evidence for landscape-level, pollen-mediated gene flow from genetically modified creeping bentgrass with cp4 epsps as a marker.	sampling methods and results of a gene flow study are described that will be of interest to plant scientists, evolutionary biologists, ecologists, and stakeholders assessing the environmental safety of transgenic crops. this study documents gene flow on a landscape level from creeping bentgrass (agrostis stolonifera l.), one of the first wind-pollinated, perennial, and highly outcrossing transgenic crops being developed for commercial use. most of the gene flow occurred within 2 km in the direct ...	2004	15448206
phytotoxins from the leaves of ruta graveolens.	bioassay-guided fractionation of the ethyl acetate extract of ruta graveolens (common rue) leaves led to the isolation of the furanocoumarins 5-methoxypsoralen (5-mop), 8-methoxypsoralen (8-mop), and the quinolone alkaloid graveoline as phytotoxic constituents. graveoline and 8-mop substantially inhibited growth of lactuca sativa (lettuce) seedlings and reduced chlorophyll content at 100 microm; this effect was not due to a direct effect on chlorophyll synthesis. radical growth of l. sativa was ...	2004	15161195
efficacy of different fungicides against rhizoctonia brown patch and pythium blight on turfgrass in italy.	brown patch, incited by rhizoctonia solani kuhn, and pythium blight, caused by pythium spp. are two of the diseases most frequently observed on turfgrass in high maintenance stands, as on golf courses. in such conditions the control strategies, based on chemicals, are particularly difficult due to the scarcity of fungicides registered for turf in italy. the results obtained in experimental trials carried out to evaluate the efficacy of chemical and biological products against brown patch and pyt ...	2003	15151284
thermotolerance and antioxidant systems in agrostis stolonifera: involvement of salicylic acid, abscisic acid, calcium, hydrogen peroxide, and ethylene.	this study investigated whether pre-treating plants with specific putative signaling components and heat acclimation would induce tolerance of a cool-season grass, creeping bentgrass (agrostis stolonifera var. palustris), to subsequent heat stress and whether thermotolerance induction of those pretreatments was associated with the regulation of antioxidant regenerating enzymes. the treatments included foliar application of salicylic acid (sa), abscisic acid (aba), calcium chloride (cacl2), hydro ...	2004	15128028
a comparison of stable caesium uptake by six grass species of contrasting growth strategy.	six plant species in the family gramineae were used to investigate the relationship between cs uptake, nutrient regime and plant growth strategy sensu grime (1979: plant growth strategies and vegetation processes, john wiley). the roots of 66 day old elymus repens (l.) gould., bromus sterilis l., agrostis stolonifera l., anthoxanthum odoratum l., festuca ovina l. and nardus stricta l. plants grown in acid-washed sand at high and low nutrient levels were exposed to a 96 h pulse of stable cs at 0. ...	1997	15093445
agrobacterium tumefaciens-mediated creeping bentgrass (agrostis stolonifera l.) transformation using phosphinothricin selection results in a high frequency of single-copy transgene integration.	genetic transformation of creeping bentgrass mediated by agrobacterium tumefaciens has been achieved. embryogenic callus initiated from seeds (cv. penn-a-4) was infected with an a. tumefaciens strain (lba4404) harboring a super-binary vector that contained an herbicide-resistant bar gene driven either by the camv 35s promoter or a rice ubiquitin promoter. plants were regenerated from 219 independent transformation events. the overall stable transformation efficiency ranged from 18% to 45%. south ...	2004	14615907
heat sensitivity in a bentgrass variant. failure to accumulate a chloroplast heat shock protein isoform implicated in heat tolerance.	two variants of creeping bentgrass (agrostis stolonifera cv palustris), developed using tissue culture, have been used to determine the roles of chloroplast-localized small heat shock proteins (cp-shsps) in heat tolerance. results from previous research indicate that the heat-tolerant variant expressed two additional cp-shsp isoforms not expressed in the heat-sensitive variant, that accumulation of the additional cp-shsp isoforms was genetically linked to thermotolerance, and that the presence o ...	2003	12970497
neozygites abacaridis sp. nov. (entomophthorales), a new pathogen of phytophagous mites (acari, eriophyidae).	a new entomopathogenic fungus, described here as neozygites abacaridis n. sp. (zygomycetes: entomophthorales), has been found on the mites abacarus hystrix, aculodes dubius, and a. mckenziei (acari: eriophyidae). it differs from other neozygites species affecting mites by its small, globose primary conidia, short-ovoid, smoky coloured capilliconidia, and very short capillary conidiophores-which are usually not longer than the spore length. this pathogen infected mite individuals in autumn (from ...	2003	12877829
using empirical data to model transgene dispersal.	one element of the current public debate about genetically modified crops is that gene flow from transgenic cultivars into surrounding weed populations will lead to more problematic weeds, particularly for traits such as herbicide resistance. evolutionary biologists can inform this debate by providing accurate estimates of gene flow potential and subsequent ecological performance of resulting hybrids. we develop a model for gene flow incorporating exponential distance and directional effects to ...	2003	12831482
risk assessment of pesticide runoff from turf.	the turfpq model was used to simulate the runoff of 15 pesticides commonly applied to creeping bentgrass (agrostis stolonifera l.) fairways and greens on golf courses in the northeastern usa. simulations produced 100-yr daily records of water runoff, pesticide runoff, and pesticide concentration in runoff for three locations: boston, ma, philadelphia, pa, and rochester, ny. results were summarized as annual and monthly means and annual maximum daily loads (amdls) corresponding to 10- and 20-yr r ...	2006	12708667
headspace solid-phase microextraction--comprehensive two-dimensional gas chromatography of wound induced plant volatile organic compound emissions.	plant emissions of volatile organic compounds from mechanically wounded agrostis stolonifera, pennisetum clandestinum, eucalyptus leucoxylon and trifolium repens have been sampled by headspace-solid phase microextraction (hs-spme) and analysed by using comprehensive two-dimensional gas chromatography (gcxgc) for measurement of the plant emissions. gcxgc produces a fingerprint of the volatile organic compounds in a 2d separation space that may be approximately interpreted as a boiling point-polar ...	2002	12537367
selectivity of florasulam in 4 grass species during the seed harvest year.	results from one year indicated that florasulam (primus) and its combination with fluorxypyr applied in spring of the seed harvest year, were completely selective in seed crops of 4 grass species; namely agrostis stolonifera, festuca rubra rubra, koeleria macrantha and lolium multiflorum. experimental treatments also included a reference product i.e. bentazone + dichlorprop-p and an untreated control; in total 7 treatments were involved. the prime objective of this study was to investigate not o ...	2001	12425099
removal of ammoniacal nitrogen from landfill leachate by irrigation onto vegetated treatment planes.	leachate is a contaminated liquor resulting from the disposal of solid and liquid wastes at landfill sites that must be treated before discharge. vegetated leachate treatment planes have been used at landfill sites in the uk but have received little scientific attention. this paper describes studies of model leachate treatment planes with a focus on the removal of ammoniacal nitrogen (nh3-n). small-scale and field-scale experimental treatment planes were constructed. filled with clay loam soil a ...	2002	11766806
effect of turfgrass cover and irrigation on soil mobility and dissipation of mefenoxam and propiconazole.	irrigation effects on pesticide mobility have been studied, but few direct comparisons of pesticide mobility or persistence have been conducted on turfgrass versus bare soil. the interaction of irrigation practices and the presence of turfgrass on the mobility and dissipation of mefenoxam [n-(2,6-dimethylphenyl)-n-(methoxyacetyl)-d-alanine methyl ester] and propiconazole (1-[[2-(2,4-dichlorophenyl)-4-propyl-1,3-dioxolan-2-yl]methyl]-1h-1,2,4-triazole) was studied. sampling cylinders (20-cm diam. ...	2016	11577867
costs of plasticity in foraging characteristics of the clonal plant ranunculus reptans.	in clonal plants, evolution of plastic foraging by increased lengths of leaves and internodes under unfavourable conditions may be constrained by costs and limits of plasticity. we studied costs and limits of plasticity in foraging characteristics in 102 genotypes of the stoloniferous herb ranunculus reptans. we grew three replicates of each genotype with and three without competition by the naturally co-occuring grass agrostis stolonifera. we used regression and correlation analyses to investig ...	2000	11209772
phytotoxic lignans of leucophyllum frutescens.	bioassay-guided fractionation of the hexane:ethyl acetate (1:1) extract of the leaves of leucophyllum frutescens (berl.) i.m.johnst (scrophulariaceae) led to the isolation of its phytotoxic constituents diayangambin (1), epiyangambin (2), diasesartemin (3) and epiashantin (4). phytotoxicity was demonstrated as inhibition of seed germination of agrostis stolonifera cv. penncross (poaceae) and inhibition of development of lactuca sativa l. (asteraceae) seedlings in a microassay using 24-well plate ...	1999	10441036