Poaceae aqueous extract on ethanolinduced hypertension in wistar rat. Low molecular weight organic acids in the root exudates l. In this study, a crhyperaccumulator, leersia hexandra was investigated for its potential to remove cr from the soil in. The teleomorph of moesziomyces antarcticus, previously known only from japan, is found for the first time in. Leersia hexandra is a species of grass known by the common names southern cutgrass. Plants profile for leersia hexandra southern cutgrass.
This page was last edited on 14 september 2017, at 20. The results of the survey showed that the swamp was a. A cutter head for a lawn mower which has a plurality of fingers arranged in two sets, one above the other, that extend forward in the direction of travel to channel grass between them. They differ from sympatric ricefeeding populations in characters of pulse repetition frequencies of male and female acoustic courtship signals. Determination of organic acids in the root exudates of cr. After feeding on cutgrass for 30 days, summer weevils initiated oviposition rapidly after being transferred to young rice plants, and the percentage of ovipositing weevils was 80100% after 2 weeks.
Randomly amplified polymorphic dna rapd technique was applied to assess the genetic variations and phylogenetic relationships in genetic differentiation within 4 chromiumtreatment leersia hexandra. Sampling was conducted in all recognizable vegetation communities. An investigation of lemma micromorphology in thai oryzeae. This study aimed to evaluate the curative effects of the aqueous extract of l.
Potential of leersia hexandra swartz for phytoextraction. This page was last edited on 26 august 2017, at 14. Archived profiles will only appear in the general search results if the include archived profiles option is selected. Assessment of antibacterial, thrombolytic and cytotoxic. Leersia hexandra was investigated for its potential to.
Leersia in world checklist of selected plant families. One clade contained two specimens that produced a teleomorph in the flowers of echinochloa kimberleyensis in. Leersia hexandra was investigated for its potential to remove cr from the soil in a series of. Pdf potential of leersia hexandra swartz for phytoextraction of cr. The phylogenetic analysis resolved eight wellsupported clades, of which three contained type specimens of known species of moesziomyces. This page was last edited on 17 december 2019, at 02. The scatter plot based on seven morphometric characters indicated that n. Pdf antihypertensive activity of leersia hexandra sw. A combined ecological, morphological, and molecular approach was used to examine 26 herbarium specimens and eight strains of moesziomyces. It is also an introduced species in many regions, sometimes becoming invasive, and it is an agricultural weed of various crops, especially rice. Text is available under the creative commons attributionsharealike license. Leersia hexandra, a weed host of the rice brown planthopper, nilaparvata lugens stal. An investigation of lemma micromorphology in thai oryzeae poaceae pirada sumanon, paweena traiperm.
The low molecular weight organic acids in root exudates of. Subcellular fractionation of crcontaining tissues showed that most of the accumulated cr was isolated to the cell walls in roots and the vacuoles in leaves. Phytoremediation potential of leersia hexandra swartz of copper contaminated soil and its enhancement by using agronomic management practices. All structured data from the file and property namespaces is available under the creative commons cc0 license. Article received 9 jun 2010 accepted 17 aug 2011 published 20 sep 2011 doi. Please note that this is a trial program and may end. In extreme droughts, when the bottom may be exposed for longer times, ruderal species such as cyperus spp. A 4arylcoumarin from coutarea hexandra pdf free download. Subcellular distribution of chromium in accumulating plant. However, the environmental factors responsible for diapause induction have not been thoroughly studied. Bioaccumulation and chemical form of chromium in leersia. Coastal plain semipermanent impoundment communities are ponded wetlands produced by beaver dams or by longestablished manmade dams that produce similar ponds. Antiproliferative, apoptotic induction, and antiinvasive effects of leersia hexandra l.
The fresh leaves of leersia hexandra cultivated on the condition of chrome pollution and exogenous organic acids were used as experimental. In addition, the leaves of leersia are very rough to the touch, leersia having retrorse hairs on the underside of the midrib. It was observed that the root exudates can mobilize cr 2 o 3, pbcro 4 as well as crcontaminated soil. Potential of leersia hexandra swartz for phytoextraction of cr from soil. Leersia hexandra is a species of grass known by the common names southern cutgrass, clubhead cutgrass, and swamp rice grass. From the methanolic extract of the stem of coutarea hexandra we have isolated chromatographically a new natural product. Biological sciences grasses nitrogen fixation nitrogen fixation petroleo aspectos sociales investigacion cientifica. All three species can expand clonally to form a vegetative matrix throughout a wetland. The genetic basis of host plant adaptation in the brown. The plants grown in hydroponics were exposed to cr at 0, 5, 30, and 60.
Archived 201106 at the wayback machine grass manual. Determination of cr vi in leersia hexandra swartz based. Southern cutgrass, leersia hexandra swartz, is a widely distributed perennial grass in the rice ecosystem of regions where rice water weevil occurs. After feeding on cutgrass for 30 days, summer weevils initiated oviposition rapidly after. Leersia hexandra was completely unsuitable as a host for the nymphs of the three table 1. Files are available under licenses specified on their description page. Swamp rice grass leersia hexandra important information. Characterization of microbial communities, identification.
This study examined the relationship between oxalic acid and cr tolerance in an accumulating plant leersia hexandra swartz. The habitat structure of lukanga ramsar site in central. Genetic differentiation caused by chromium treatment in. The subcellular distribution of chromium in leersia hexandra swartz, a craccumulating plant found in china, was studied by differential centrifugation, transmission electron microscope and energy dispersive analysis of xray. It was named for the german botanist johann daniel leers 17271774 species. Chromium treatment could significantly increase the. The chromium bioaccumulation ability of leersia hexandra was assessed and the chromium distribution in the deferent chemical forms in plant tissues was determined. Effect of simulated harvesting on the plant composition in the floating grasslands of keibul lamjao national park, manipur written by thounaojam sanggai leima, pebam rocky, ruchi badola published on 20191004 download full article with reference data and citations. A total of fifteen experiments including morphological, molecular genetic and host plant relationship studies were conducted to differentiate between two sympatric populations of brown planthopper bph, nilaparvata lugens, one from rice oryza sativa and the other from leersia hexandra, a weed grass. Between the fingers is a conveyor belt carrying a set of short blades moving transverse to the direction of motion of the mower for shearing the grass that is channeled by the fingers. Accumulation and transportation of copper in different. The name thecaphora globuligera now moesziomyces globuligerus is available for this species, which is lectotypified. It was trimmed to 15 cm and then washed with pure water. Phytoremediation potential of leersia hexandra swartz of.
Coastal plain semipermanent impoundment sandhills mire subtype concept. Read kinetic parameters and mechanisms of the batch biosorption of crvi and criii onto leersia hexandra swartz biomass, journal of colloid and interface science on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at. The hydroponic experimental results indicated that the maximum chromium concentration in the dry leaf matter of leersia hexandra reached 4302 mg kg. Hypertension was induced in rats by oral administration of ethanol 5 gkgday for five weeks. Oryza, leersia, hygroryza, zizania introduction oryzeae dumort. Effect of simulated harvesting on the plant composition in. Two sibling species of nilaparvata lugens sensu lato were collected from cultivated rice oryza sativa and two from the wild grass leersia hexandra. The root exudates of leersia hexandra swartz were collected to investigate their mobilization of chromic oxide cr 2 o 3, lead chromate pbcro 4 and crcontaminated soil. Author links open overlay panel hua lin a b xuehong zhang a b jun chen a b liang liang a liheng liu a b.
School of life and environmental sciences, guilin university of electronic technology, guilin 541004, china. The rotary mower blade of this invention allows grass clippings, leaves and twigs to be finely shredded, to be greatly reduced in bulk volume, and to decompose rapidly on the ground or in a compost pile. Southern cutgrass, leersia hexandra swartz1, allows rice. Leersia denudata launert from kenya to cape province. Leersia is a genus of plants in the grass family which includes species known generally as cutgrasses the genus is widespread across many countries on all the inhabited continents. We studied the genetic architecture of host plant adaptation in two populations of brown planthopper nilaparvata lugens homoptera. Variation in hostplant relations and courtship signals of.
Genetic dissection of sympatric populations of brown. Abstractthis study used hydroponics with different copper cu concentrations to assess metal accumulation and growth in two different populations of leersia hexandra swartz, one obtained from a contaminated area cp and the other from a noncontaminated area ncp. Occurrence in nature of an alternative host leersia hexandra sw. Effects of dominant species on vegetation change in. Insecticide resistance spectrum and underlying resistance. In vitro study of antiproliferation and cytotoxicity of the hexane and butanolic extracts of the three grass species, namely leersia hexandra l. Leersia hexandra swartz was collected from the nonpolluted area of the liangfeng river beach in yanshan district, guilin, china. A field survey was carried out to determine the vegetation structure of the lukanga swamp ramsar site in central zambia. Determination of organic acids in the root exudates of crhyperaccumulator leersia hexandra swartz using high performance liquid chromatography. The aim of the study was to identify the different vegetation communities, species composition and distribution patterns for improved habitat management.
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