| growth and lead accumulation by the grasses vetiveria zizanioides and thysanolaena maxima in lead-contaminated soil amended with pig manure and fertilizer: a glasshouse study. | bo ngam lead mine soils contain high concentrations of lead (up 1% total pb) and low amounts of organic matter and major nutrients (n, p, k). a glasshouse study was conducted to compare growth performance, metal tolerance and metal uptake by two grasses, thysanolaena maxima (roxb.) o. kuntze and four ecotypes of vetiveria zizanioides (l.) nash, syn. chrysopogon zizanioides (l.) roberty (three from thailand: surat thani, songkhla and kamphaeng phet, and one from sri lanka) and to study the effect ... | 2007 | 16828842 |
| comparison of the bacterial community and characterization of plant growth-promoting rhizobacteria from different genotypes of chrysopogon zizanioides (l.) roberty (vetiver) rhizospheres. | molecular approaches [pcr-denaturing gradient gel electrophoresis (dgge)] were used to determine whether three different vetiver (chrysopogon zizanioides) genotypes, commercially used in brazil and considered economically important over the world, select specific bacterial populations to coexist in their rhizospheres. dgge profiles revealed that the predominant rhizospheric bacterial community hardly varies regarding the vetiver genotype. moreover, using traditional cultivation methods, bacteria ... | 2009 | 19763409 |
| sumo-fusion, purification, and characterization of a (+)-zizaene synthase from chrysopogon zizanioides. | an uncharacterized plant cdna coding for a polypeptide presumably having sesquiterpene synthase activity, was expressed in soluble and active form. two expression strategies were evaluated in escherichia coli. the enzyme was fused to a highly soluble sumo domain, in addition to being produced in an unfused form by a cold-shock expression system. yields up to ∼325 mg/l(-1) were achieved in batch cultivations. the 6x-his-tagged enzyme was purified employing an ni(2+)-imac-based procedure. identity ... | 2015 | 25701786 |
| acaricidal properties of vetiver essential oil from chrysopogon zizanioides (poaceae) against the tick species amblyomma cajennense and rhipicephalus (boophilus) microplus (acari: ixodidae). | ticks are arthropods widely distributed in tropical and subtropical regions, which can transmit infectious agents also responsible for zoonoses. excessive use of conventional acaricides has resulted in the onset of drug resistance by these parasites, thus the need to use alternative methods for their control. this study evaluated the acaricidal activities of chrysopogon zizanioides (vetiver) essential oils containing different zizanoic and khuzimol (high and low acidity) acid concentrations on a ... | 2015 | 26359641 |
| phytoremediation of palm oil mill secondary effluent (pomse) by chrysopogon zizanioides (l.) using artificial neural networks. | artificial neural networks (anns) have been widely used to solve the problems because of their reliable, robust, and salient characteristics in capturing the nonlinear relationships between variables in complex systems. in this study, ann was applied for modeling of chemical oxygen demand (cod) and biodegradable organic matter (bod) removal from palm oil mill secondary effluent (pomse) by vetiver system. the independent variable, including pomse concentration, vetiver slips density, and removal ... | 2017 | 27748626 |
| tetracycline uptake and metabolism by vetiver grass (chrysopogon zizanioides l. nash). | environmental contamination by antibiotics not only perturbs the ecological balance but also poses a risk to human health by promoting the development of multiantibiotic-resistant bacteria. this study focuses on identifying the biochemical pathways associated with tetracycline (tc) transformation/degradation in vetiver grass that has the potential to be used as a biological remediation system in tc-contaminated water sources. a hydroponic experimental setup was used with four initial tc concentr ... | 2016 | 27662856 |
| arbuscular mycorrhizal fungi in the growth and extraction of trace elements by chrysopogon zizanioides (vetiver) in a substrate containing coal mine wastes. | vetiver (chrysopogon zizanioides) is a fast-growing, high biomass producing plant employed for environmental rehabilitation. the study evaluated the effects of arbuscular mycorrhizal fungi (amf) on the growth and trace element phytoextracting capabilities of vetiver in a substrate containing coalmine wastes in southern brazil. amf included acaulospora colombiana, acaulospora morrowiae, acaulospora scrobiculata, dentiscutata heterogama, gigaspora margarita, and rhizophagus clarus. among those, a. ... | 2017 | 27491701 |
| modeling bod and cod removal from palm oil mill secondary effluent in floating wetland by chrysopogon zizanioides (l.) using response surface methodology. | while the oil palm industry has been recognized for its contribution towards economic growth and rapid development, it has also contributed to environmental pollution due to the production of huge quantities of by-products from the oil extraction process. a phytoremediation technique (floating vetiver system) was used to treat palm oil mill secondary effluent (pomse). a batch study using 40 l treatment tanks was carried out under different conditions and response surface methodology (rsm) was ap ... | 2016 | 27393941 |
| ecological restoration alters microbial communities in mine tailings profiles. | ecological restoration of mine tailings have impact on soil physiochemical properties and microbial communities. the surface soil has been a primary concern in the past decades, however it remains poorly understood about the adaptive response of microbial communities along the profile during ecological restoration of the tailings. in this study, microbial communities along a 60-cm profile were investigated in a mine tailing pond during ecological restoration of the bare waste tailings (bw) with ... | 2016 | 27126064 |
| phytoremediation of cu and zn by vetiver grass in mine soils amended with humic acids. | phytoremediation of contaminated mine soils requires the use of fast-growing, deep-rooted, high-biomass, and metal-tolerant plants with the application of soil amendments that promote metal uptake by plants. a pot experiment was performed to evaluate the combined use of vetiver grass (chrysopogon zizanioides) and humic acid for phytoremediation of cu and zn in mine soils. vetiver plants were grown in soil samples collected from two mine sites of spain mixed with a commercial humic acid derived f ... | 2016 | 27030238 |
| identification of biochemical pathways associated with lead tolerance and detoxification in chrysopogon zizanioides l. nash (vetiver) by metabolic profiling. | lead (pb) is a major urban pollutant, due to deteriorating lead-based paint in houses built before 1978. phytoremediation is an inexpensive and effective technique for remediation of pb-contaminated homes. vetiver (chrysopogon zizanioides), a noninvasive, fast-growing grass with high biomass, can tolerate and accumulate large quantities of pb in its tissues. lead is known to induce phytochelatins and antioxidative enzymes in vetiver; however, the overall impact of pb stress on metabolic pathways ... | 2016 | 26843403 |
| uptake of 2,4-bis(isopropylamino)-6-methylthio-s-triazine by vetiver grass (chrysopogon zizanioides l.) from hydroponic media. | 2,4-bis(isopropylamino)-6-methylthio-s-triazine (prometryn) poses a risk to aquatic environments in several countries, including china, where its use is widespread, particularly due to its chemical stability and biological toxicity. vetiver grass (chrysopogon zizanioides l.) was tested for its potential for phytoremediation of prometryn. vetiver grass was grown in hydroponic media in a greenhouse, in the presence of prometryn, with appropriate controls. plant uptake and removal of prometryn from ... | 2016 | 26810796 |
| adaptation and detoxification mechanisms of vetiver grass (chrysopogon zizanioides) growing on gold mine tailings. | vetiver grass (chrysopogon zizanioides) was investigated for its potential use in the rehabilitation of gold mine tailings, its ability to extract and accumulate toxic metals from the tailings and its metal tolerant strategies. vetiver grass was grown on gold mine tailings soil, in a hothouse, and monitored for sixteen weeks. the mine tailings were highly acidic and had high electrical conductivity. vetiver grass was able to grow and adapt well on gold mine tailings. the results showed that veti ... | 2016 | 26588814 |
| molecular and chemical characterization of vetiver, chrysopogon zizanioides (l.) roberty, germplasm. | due to the economic interests in vetiver, chrysopogon zizanioides (l.) roberty, molecular and chemical studies are essential to generate information for its sustainable exploitation. the aim of this study was to undertake a molecular and chemical characterization of vetiver accessions of the active germplasm bank of the universidade federal de sergipe. the molecular characteristics of the accessions were studied using amplified fragment length polymorphism markers, with a total of 14 primer comb ... | 2015 | 26345879 |
| effect of organic manures on the growth of cymbopogon citratus and chrysopogon zizanioides for the phytoremediation of chromite-asbestos mine waste: a pot scale experiment. | the abandoned chromite-asbestos mines are located in the roro hills, west singhbhum, jharkhand, india, where mining operation ceased in 1983, and since then these mines are causing environmental pollution. the present study was planned to phytoremediate these metalloid and metal contaminated mine waste by using two aromatic grasses, cymbopogon citratus and chrysopogon zizanioides by applying different proportions of amendments (chicken manure, farmyard manure and garden soil). mine waste has neu ... | 2015 | 25495934 |
| unravelling the scent of vetiver: identification of character-impact compounds. | vetiver oil is a highly esteemed basic ingredient of modern perfumery, but the nature of the constituents that really impart its typical and most sought woody-earthy scent has remained controversial. indeed, vetiver oil is considered as one of the most complex essential oils, being mostly composed of several hundreds of sesquiterpene derivatives with a large structural diversity. its complexity has hindered the direct identification of its odoriferous components. we thus aimed at using a combina ... | 2014 | 25408325 |
| performance evaluation of a dual-flow recharge filter for improving groundwater quality. | a dual-flow multimedia stormwater filter integrated with a groundwater recharge system was developed and tested for hydraulic efficiency and pollutant removal efficiency. the influent stormwater first flows horizontally through the circular layers of planted grass and biofibers. subsequently, the flow direction changes to a vertical direction so that water moves through layers of pebbles and sand and finally gets recharged to the deep aquifers. the media in the sequence of vegetative medium:biof ... | 2014 | 25112029 |
| study of the spatial distribution of mercury in roots of vetiver grass (chrysopogon zizanioides) by micro-pixe spectrometry. | localization of hg in root tissues of vetivergrass (chrysopogon zizanioides) was investigated by micro-proton induced x-ray emission (pixe) spectrometry to gain a better understanding of hg uptake and its translocation to the aerial plant parts. tillers of c. zizanioides were grown in a hydroponic culture for 3 weeks under controlled conditions and then exposed to hg for 10 days with or without the addition of the chelators (nh(4))(2)s(2)o(3) or ki. these treatments were used to study the effect ... | 2014 | 24933909 |
| comparison of carbon balance in mediterranean pilot constructed wetlands vegetated with different c4 plant species. | this study investigates carbon dioxide (co2) and methane (ch4) emissions and carbon (c) budgets in a horizontal subsurface flow pilot-plant constructed wetland (cw) with beds vegetated with cyperus papyrus l., chrysopogon zizanioides (l.) roberty, and mischantus × giganteus greef et deu in the mediterranean basin (sicily) during the 1st year of plant growing season. at the end of the vegetative season, m. giganteus showed the higher biomass accumulation (7.4 kg m(-2)) followed by c. zizanioides ... | 2015 | 24743957 |
| uptake and accumulation of endosulfan isomers and its metabolite endosulfan sulfate in naturally growing plants of contaminated area. | endosulfan isomers (α+β) and its main metabolite endosulfan sulfate were analyzed in naturally growing vegetation of pesticide contaminated area in ghaziabad, india. seven species of dominating plants were collected at different locations within the contaminated area. endosulfan residues from plant parts and soil were extracted and determined by a gas chromatograph equipped with 63ni electron capture detector (gc-ecd). endosulfan isomers and endosulfan sulfate were present in almost all soil and ... | 2014 | 24681448 |
| chrysopogon zizanioides aqueous extract mediated synthesis, characterization of crystalline silver and gold nanoparticles for biomedical applications. | the exploitation of various plant materials for the biosynthesis of nanoparticles is considered a green technology as it does not involve any harmful chemicals. the aim of this study was to develop a simple biological method for the synthesis of silver and gold nanoparticles using chrysopogon zizanioides. to exploit various plant materials for the biosynthesis of nanoparticles was considered a green technology. an aqueous leaf extract of c. zizanioides was used to synthesize silver and gold nano ... | 2013 | 23861583 |
| phytoremediation potential of vetiver grass [chrysopogon zizanioides (l.)] for tetracycline. | the presence of veterinary and human antibiotics in soil and surface water is an emerging environmental concern. the current study was aimed at evaluating the potential of using vetiver grass as a phytoremediation agent in removing tetracycline (tc) from aqueous media. the study determined uptake, translocation, and transformation of tc in vetiver grass as function of initial antibiotic concentrations and exposure time. vetiver plants were grown for 60 days in a greenhouse in tc contaminated hyd ... | 2013 | 23488000 |
| effect of calcium on growth performance and essential oil of vetiver grass (chrysopogon zizanioides) grown on lead contaminated soils. | the aim of this study was to investigate effect of calcium on growth, survival, essential oil yield and chemical compositions of vetiver grass grown on lead contaminated soils. calcium inform of caco3 (0, 2000, 4000, 6000 mg ca kg(-1)) was added to river sand soils containing 4000 mg pb kg(-1) dry soil. results showed that, in the absence of calcium treatment, no plants survived after 2 weeks of cultivation, while the rest grew well to the end of the experimental period (42 weeks). calcium treat ... | 2011 | 22046757 |
| greenhouse study on the phytoremediation potential of vetiver grass, chrysopogon zizanioides l., in arsenic-contaminated soils. | the purpose of this greenhouse study was to assess the capacity of vetiver grass to accumulate arsenic from pesticide-contaminated soils of varying physico-chemical properties. results indicate that vetiver is capable of tolerating moderate levels of arsenic up to 225 mg/kg. plant growth and arsenic removal efficiency was strongly influenced by soil properties. arsenic removal was highest (10.6%) in millhopper soil contaminated with 45 mg/kg arsenic, which decreased to 4.5 and 0.6% at 225 and 45 ... | 2011 | 21190015 |
| symbiotic role of glomus mosseae in phytoextraction of lead in vetiver grass [chrysopogon zizanioides (l.)]. | lead (pb) has limited solubility in the soil environment owing to complexation with various soil components. although total soil pb concentrations may be high at a given site, the fraction of soluble pb that plants can extract is very small, which is the major limiting factor for pb phytoremediation. the symbiotic effect of arbuscular mycorrhizal (am) fungus, glomus mosseae was examined on growth and phytoextraction of lead (pb) by vetiver grass [chrysopogon zizanioides (l.)]. a hydroponic study ... | 2010 | 20061082 |
| the possible role of hydroxylation in the detoxification of atrazine in mature vetiver (chrysopogon zizanioides nash) grown in hydroponics. | the resistance mechanism of vetiver (chrysopogon zizanioides) to atrazine was investigated to evaluate its potential for phytoremediation of environment contaminated with the herbicide. plants known to metabolise atrazine rely on hydroxylation mediated by benzoxazinones, conjugation catalyzed by glutathione-s-transferases and dealkylation probably mediated by cytochromes p450. all three possibilities were explored in mature vetiver grown in hydroponics during this research project. here we repor ... | 2014 | 16042344 |