Publications

TitleAbstractYear(sorted ascending)
Filter
PMID
Filter
cytochrome p450 inhibitors reduce creeping bentgrass (agrostis stolonifera) tolerance to topramezone.creeping bentgrass (agrostis stolonifera l.) is moderately tolerant to the p-hydroxyphenylpyruvate dioxygenase-inhibiting herbicide topramezone. however, the contribution of plant metabolism of topramezone to this tolerance is unknown. experiments were conducted to determine if known cytochrome p450 monooxygenase inhibitors 1-aminobenzotriazole (abt) and malathion alone or in combination with the herbicide safener cloquintocet-mexyl influence creeping bentgrass tolerance to topramezone. creeping ...201526186714
suitability of creeping bentgrass and bermudagrass cultivars for black cutworms and fall armyworms (lepidoptera: noctuidae).the black cutworm, agrotis ipsilon hufnagel, and fall armyworm, spodoptera frugiperda smith (lepidoptera: noctuidae), are common turfgrass pests of golf courses in the southeastern united states. heat-tolerant bentgrass (agrostis stolonifera l.) cultivars are expanding the range of bentgrass further south, but these cultivars have not been studied for their potential host plant resistance to black cutworm or fall armyworm. the goals of the study were to investigate feeding response of black cutw ...201526470340
limited transpiration under high vapor pressure deficits of creeping bentgrass by application of daconil-action.first observation that chemical spray can induce limited-transpiration rate under high vapor pressure deficit. it appears that acibenzolar may be key in inducing this water conservation trait. irrigation and water use have become major issues in management of turfgrasses. plant health products that have been introduced into the turfgrass market have been observed to improve plant performance in water stress conditions. in this study, we evaluated whether a selection of common plant health produc ...201626438219
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. ...201611577867
ashsp17, a creeping bentgrass small heat shock protein modulates plant photosynthesis and aba-dependent and independent signalling to attenuate plant response to abiotic stress.heat shock proteins (hsps) are molecular chaperones that accumulate in response to heat and other abiotic stressors. small hsps (shsps) belong to the most ubiquitous hsp subgroup with molecular weights ranging from 12 to 42 kda. we have cloned a new shsp gene, ashsp17 from creeping bentgrass (agrostis stolonifera) and studied its role in plant response to environmental stress. ashsp17 encodes a protein of 17 kda. its expression was strongly induced by heat in both leaf and root tissues, and by s ...201626610288
biodegradable poly-3-hydroxybutyrate as a fertiliser carrier.increasing use of mineral fertilisers can lead to accumulation of fertilisers in soil, water and foodstuffs. one of the approaches to preventing these problems is to develop controlled release forms of fertilisers.201626763527
differentially expressed genes associated with improved drought tolerance in creeping bentgrass overexpressing a gene for cytokinin biosynthesis.transformation with an isopentenyl transferase (ipt) gene controlling cytokinin (ck) synthesis has been shown to enhance plant drought tolerance. the objective of this study was to identify differentially-expressed genes (degs) in creeping bentgrass (agrostis stolonifera) overexpressing ipt compared to non-transgenic plants. the ipt transgene was controlled by a senescence-activated promoter (sag12). both a null transformed line (nt) and sag12-ipt plants were exposed to drought stress in an envi ...201627855226
cloning and expression of the 1-aminocyclopropane-1-carboxylic oxidase gene from agrostis stolonifera.a gene encoding 1-aminocyclopropane-1-carboxylic oxidase (aco), which catalyzes the terminal step in ethylene biosynthesis, was isolated from agrostis stolonifera. the asaco gene is composed of 975 bp, encoding 324 amino acids. three exons interspersed by two introns form asaco gdna. a blast search of the nucleotide sequence revealed a high level of similarity (79-91%) between asaco and aco genes of other plants. a phylogenetic tree was constructed via blast in the ncbi, and revealed the highest ...201627820649
poly(3-hydroxybutyrate)/metribuzin formulations: characterization, controlled release properties, herbicidal activity, and effect on soil microorganisms.slow-release formulations of the herbicide metribuzin (met) embedded in the polymer matrix of degradable poly-3-hydroxybutyrate [p(3hb)] in the form of microparticles, films, microgranules, and pellets were developed and tested. the kinetics of polymer degradation, met release, and accumulation in soil were studied in laboratory soil microecosystems with higher plants. the study shows that met release can be controlled by using different techniques of constructing formulations and by varying met ...201627628924
metabolic pathways regulated by γ-aminobutyric acid (gaba) contributing to heat tolerance in creeping bentgrass (agrostis stolonifera).γ-aminobutyric acid is a non-protein amino acid involved in various metabolic processes. the objectives of this study were to examine whether increased gaba could improve heat tolerance in cool-season creeping bentgrass through physiological analysis, and to determine major metabolic pathways regulated by gaba through metabolic profiling. plants were pretreated with 0.5 mm gaba or water before exposed to non-stressed condition (21/19 °c) or heat stress (35/30 °c) in controlled growth chambers fo ...201627455877
constructing slow-release formulations of metribuzin based on degradable poly(3-hydroxybutyrate).experimental formulations of herbicide metribuzin embedded in matrices of degradable natural polymer poly(3-hydroxybutyrate) (p3hb) and its composites with poly(ethylene glycol) (peg), poly-ε-caprolactone (pcl), and wood powder have been prepared in the form of pressed pellets containing 75% polymeric basis (pure p3hb or its composite with a second component at a ratio of 7:3) and 25% metribuzin. incubation of formulations in soil laboratory systems led to the degradation of the matrix and herbi ...201627356030
synonymous mutation gene design to overexpress accase in creeping bentgrass to obtain resistance to accase-inhibiting herbicides.overexpression of a native gene can cause expression of both introduced and native genes to be silenced by posttranscriptional gene silencing (ptgs) mechanisms. ptgs mechanisms rely on sequence identity between the transgene and native genes; therefore, designing genes with mutations that do not cause amino acid changes, known as synonymous mutations, may avoid ptgs. for proof of concept, the sequence of acetyl-coa carboxylase (accase) from creeping bentgrass (agrostis stolonifera l.) was altere ...201627116460
effects of cytokinin and nitrogen on drought tolerance of creeping bentgrass.cytokinin (ck) is a vital plant hormone that controls many aspects of growth and development in plants. nitrogen (n) is the indispensable macronutrient needed in plants and also one of the most important limiting factors for plant growth. this study was designed to investigate the simultaneous effects of ck and n on the visual turf quality and antioxidant metabolism of drought-stressed creeping bentgrass (agrostis stolonifera l.). 'penna-4' creeping bentgrass treated with trans-zeatin riboside a ...201627099963
enhancing cytokinin synthesis by overexpressing ipt alleviated drought inhibition of root growth through activating ros-scavenging systems in agrostis stolonifera.drought stress limits root growth and inhibits cytokinin (ck) production. increases in ck production through overexpression of isopentenyltransferase (ipt) alleviate drought damages to promote root growth. the objective of this study was to investigate whether ck-regulated root growth was involved in the alteration of reactive oxygen species (ros) production and ros scavenging capacity under drought stress. wild-type (wt) creeping bentgrass (agrostis stolonifera l. 'penncross') and a transgenic ...201626889010
responses of poa annua and three bentgrass species (agrostis spp.) to adult and larval feeding of annual bluegrass weevil, listronotus maculicollis (coleoptera: curculionidae).the annual bluegrass weevil (abw), listronotus maculicollis kirby, is an economically important pest of short-cut turfgrass in eastern north america. wide spread insecticide resistance warrants the development of alternative management strategies for this pest. abw damage typically occurs in areas with a high percentage of annual bluegrass, poa annua l., the preferred abw host. damage to bentgrasses, agrostis spp., is much rarer and usually less severe. to aid the implementation of host plant re ...201627353253
chlorophyll loss associated with heat-induced senescence in bentgrass.heat stress-induced leaf senescence is characterized by the loss of chlorophyll from leaf tissues. the objectives of this study were to examine genetic variations in the level of heat-induced leaf senescence in hybrids of colonial (agrostis capillaris)×creeping bentgrass (agrostis stolonifera) contrasting in heat tolerance, and determine whether loss of leaf chlorophyll during heat-induced leaf senescence was due to suppressed chlorophyll synthesis and/or accelerated chlorophyll degradation in t ...201627297985
an evaluation of the use of individual grass species in retaining polluted soil and dust particulates in vegetated sustainable drainage devices.a sustainable means of preventing polluted particulates carried in urban storm water entering rivers, groundwater and lakes is by employing vegetated sustainable drainage system (suds) devices, or best management practices to trap or biodegrade them. in the uk, a mixture of grass species is recommended for use in devices such as swales or filter strips. however, there is little evidence in support of the efficiency of the individual grasses or mixtures to deal with such contaminated material. a ...201626753553
expression in grasses of multiple transgenes for degradation of munitions compounds on live-fire training ranges.the deposition of toxic munitions compounds, such as hexahydro-1, 3, 5-trinitro-1, 3, 5-triazine (rdx), on soils around targets in live-fire training ranges is an important source of groundwater contamination. plants take up rdx but do not significantly degrade it. reported here is the transformation of two perennial grass species, switchgrass (panicum virgatum) and creeping bentgrass (agrostis stolonifera), with the genes for degradation of rdx. these species possess a number of agronomic trait ...201627862819
pollen-mediated gene flow from transgenic perennial creeping bentgrass and hybridization at the landscape level.the planting of 162 ha of transgenic glyphosate-resistant creeping bentgrass (agrostis stolonifera) near madras, or, usa, allowed a unique opportunity to study gene flow over time from a perennial outcrossing species at the landscape level. while conducting a four year in situ survey, we collected panicles and leaf tissue samples from creeping bentgrass and its sexually compatible species. seeds from the panicles were planted, and seedlings were tested in the greenhouse for expression of the tra ...201728257488
new pesticidal diterpenoids from vellozia gigantea (velloziaceae), an endemic neotropical plant living in the endangered brazilian biome rupestrian grasslands.vellozia gigantea is a rare, ancient, and endemic neotropical plant present in the brazilian rupestrian grasslands. the dichloromethane extract of v. gigantea adventitious roots was phytotoxic against lactuca sativa, agrostis stolonifera, and lemna paucicostata, and showed larvicidal activity against aedes aegypti. phytotoxicity bioassay-directed fractionation of the extract revealed one new isopimaradiene, 8(9),15-isopimaradien-1,3,7,11-tetraone, and three new cleistanthane diterpenoids, 7-oxo- ...201728117710
candidate genes and molecular markers associated with heat tolerance in colonial bentgrass.elevated temperature is a major abiotic stress limiting the growth of cool-season grasses during the summer months. the objectives of this study were to determine the genetic variation in the expression patterns of selected genes involved in several major metabolic pathways regulating heat tolerance for two genotypes contrasting in heat tolerance to confirm their status as potential candidate genes, and to identify pcr-based markers associated with candidate genes related to heat tolerance in a ...201728187136
metabolic pathways regulated by abscisic acid, salicylic acid and γ-aminobutyric acid in association with improved drought tolerance in creeping bentgrass (agrostis stolonifera).abscisic acid (aba), salicylic acid (sa) and γ-aminobutyric acid (gaba) are known to play roles in regulating plant stress responses. this study was conducted to determine metabolites and associated pathways regulated by aba, sa and gaba that could contribute to drought tolerance in creeping bentgrass (agrostis stolonifera). plants were foliar sprayed with aba (5 μm), gaba (0.5 mm) and sa (10 μm) or water (untreated control) prior to 25 days drought stress in controlled growth chambers. applicat ...201727507681
ectopic expression of a cyanobacterial flavodoxin in creeping bentgrass impacts plant development and confers broad abiotic stress tolerance.flavodoxin (fld) plays a pivotal role in photosynthetic microorganisms as an alternative electron carrier flavoprotein under adverse environmental conditions. cyanobacterial fld has been demonstrated to be able to substitute ferredoxin of higher plants in most electron transfer processes under stressful conditions. we have explored the potential of fld for use in improving plant stress response in creeping bentgrass (agrostis stolonifera l.). overexpression of fld altered plant growth and develo ...201727638479
Refresh
firstprev
12
nextlast
Displaying items 101 - 123 of 123