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... Understanding the spatial distribution of vegetation species is essential to gain knowledge on the recovery process of an ecosystem. Few studies have used deep learning and machine learning models for image processing focusing on forest/crop classification. This study, therefore, makes use of a multi-layer perceptron (MLP) deep neural network to discriminate grass species in a mountainous region u ...
... The higher contribution of methane (CH₄) to global anthropogenic potential is a cause of concern to livestock producers. Mimosa tannin gained recent acceptance as an additive for enteric CH₄ mitigation. However, rumen fermentation and digestibility are compromised when large quantities of tannins are supplemented due to the presence of hydrolysable tannin and other non-tannin molecules in mimosa e ...
Eragrostis curvula; Vachellia; biomass; climate change; drought; grasses; microhabitats; rain; sapling growth; savannas; specific leaf area; temperature; water supply; South Africa
Abstract:
... Warming as well as increasingly frequent and severe droughts under climate change are expected to have global impacts on vegetation. We examined the independent and interactive effects of water availability and warming on the growth of savanna grasses and tree saplings. We used a widespread C₄ grass species Eragrostis curvula, and a native woody encroacher, Vachellia sieberiana, in South Africa. W ...
... Simulation modelling of grass biomass production has gained huge attention since the early 2000s, but it has rarely been applied to southern African rangelands, due to limited data availability for model calibration and evaluation. This study was conducted to calibrate the Sustainable Grazing Systems (SGS) pasture model using measured and sourced data, to assess the reliability of model predicted ...
... The biggest threat to cattle production in most South African communal areas is poor management of grazing, which negatively affects vegetation and soil structures. This study was conducted to assess the spatial variation of grass species density, production potential and quality in Breyten (Hutton soil type), Davel (Avalon soil type), and Wesselton (Clovelly soil type) communal rangelands in the ...
Jose Carballo; Diego Zappacosta; Gianpiero Marconi; Jimena Gallardo; Marco Di Marsico; Cristian A. Gallo; Mario Caccamo; Emidio Albertini; Viviana Echenique
... DNA methylation is an epigenetic mechanism by which a methyl group is added to a cytosine or an adenine. When located in a gene/regulatory sequence it may repress or de-repress genes, depending on the context and species. Eragrostis curvula is an apomictic grass in which facultative genotypes increases the frequency of sexual pistils triggered by epigenetic mechanisms. The aim of the present study ...
... Eragrostis curvula (Schrad.) Ness is a grass with a particular apomictic embryo sac development called Eragrostis type. Apomixis is a type of asexual reproduction that produces seeds without fertilization in which the resulting progeny is genetically identical to the mother plant and with the potential to fix the hybrid vigour from more than one generation, among other advantages. The absence of m ...
... Treatment of diseases is a major challenge in Lesotho due to several factors, such as limited availability and affordability of western medicine, as well as accessibility to healthcare facilities. As a result, traditional medicine plays a vital role in the well-being of the population in the country. Many studies conducted on medicinal plants in Lesotho have primarily focused on indigenous uses of ...
... The annual herb Parthenium hysterophorus L. (Asteraceae), remains one of Southern Africa's most significant invasive weeds, commonly invading savannas, and their rangelands, causing severe losses to agriculture, livestock production and native biodiversity. Previous studies have suggested that perennial grasses may act as useful competitive species, capable of suppressing the growth and invasion o ...
... African lovegrass [Eragrostis curvula (Schrad.) Nees] is a highly invasive C₄ perennial grass that threatens global biodiversity. Appropriate management of this species has been hampered by a lack of knowledge concerning its seed ecology, resulting in significant economic and environmental impacts within various environments. Consequently, this study explored the effects of a selection of environm ...
... Eragrostis curvula (African Lovegrass) is an invasive C₄ perennial grass that is threatening natural ecosystems globally. Native to Africa, this species can tolerate a wide range of environmental conditions, from acidic soils to areas with low rainfall and regions with frequent fires, which assists in its widespread distribution. With its large production of small seeds (0.3 to 0.7 mm) and quick s ...
... Certain grasses show potential for the rehabilitation of coalmine spoils. Species selection and evaluation are used to guide the choice of the most appropriate grass species. This study evaluated the germination performance of seven forage grass species, with some represented by two varieties, under varying salinity conditions of 0 (distilled H₂O), 100, 200, 400, 600, 800 and 1 000 mS m⁻¹ of NaCl. ...
... Understanding the factors controlling tree seedling recruitment is an integral research priority for savanna ecosystems, particularly for the management of woody plant encroachment. We investigated the effects of increased nutrients, fire and grazing on the survival, growth and biomass of Acacia sieberiana using a completely randomized experimental design in the greenhouse. We simulated a typical ...
Eragrostis curvula; Themeda triandra; botanical composition; dominant species; face; forbs; herbivores; indigenous species; species richness; Australia
Abstract:
... Lowland grassy woodlands in Australia’s south-east face reductions in native plant diversity because of invasion by non-native plants. We compared the relative abundance and diversity of plant species among sites dominated by the native Kangaroo grass (KG) Themeda triandra with sites co-dominated by the non-native African lovegrass (ALG) Eragrostis curvula and KG. We found significant differences ...
... African lovegrass [Eragrostis curvula (Schrad.) Nees] is an invasive weed that is threatening biodiversity around the world and will continue to do so unless its efficient management is achieved. Consequently, laboratory and field-based experiments were performed to analyze several measures of germination to determine the effect of drought stress, radiant heat stress, and burial depth and duration ...
... A techno-economic evaluation of a lignocellulosic bioethanol facility that uses acid mine drainage for the pre-treatment of weeping love grass (Eragrostis curvula) was performed. Both separate hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF) reactor configurations were evaluated. Results were compared to an evaluation of the same process with biomass pre-t ...
... Natural compounds such as plant secondary metabolites (PSM) can be used to replace antibiotic growth promoters as rumen modifiers. In this study, the effectiveness of stored and freshly extracted Aloe vera (AV), Azadirachta indica (AZ), Moringa oleifera (MO), Jatropha curcas (JA), Tithonia diversifolia (TD) and Carica papaya (CP) crude extract and monensin on in vitro gas and methane production, o ...
... Eragrostis curvula presents mainly facultative genotypes that reproduce by diplosporous apomixis, retaining a percentage of sexual pistils that increase under drought and other stressful situations, indicating that some regulators activated by stress could be affecting the apomixis/sexual switch. Water stress experiments were performed in order to associate the increase in sexual embryo sacs with ...
... The aim of the present work was to study the feasibility of pasture cropping under the Mediterranean conditions prevailing in central Spain and its potential as a weed management tool. Three cropping systems were assessed: conventionally grown winter barley and winter barley in pasture cropping with two perennial summer species, Cynodon dactylon and Eragrostis curvula. The results showed that the ...
... Mixed grass pastures which occupy the eolian sand dunes of the southern Great Plains provide stabilizing soil cover, soil carbon (C) storage, and are a critical resource for livestock production. Large areas of dunes cover the American Great Plains, were active 700–1000 years ago during periods of frequent drought and have the potential to reactivate under forecasted climate scenarios and poor man ...
... Context Reducing emissions of greenhouse gases from livestock production systems is a global research priority. Forages that contain condensed tannins, such as the perennial legume Lespedeza cuneata, may help to reduce ruminant methane (CH4) emissions. Aims The objective of this study was to investigate the effect of feeding different levels of L. cuneata hay on feed intake and enteric CH4 emissio ...
... Animals have evolved strategies to identify areas that provide the resources and environmental conditions they need to survive and reproduce. To explore how invasions by nonnative plants might disrupt this fundamental process, we evaluated settlement patterns of migratory birds that breed in grasslands being invaded by two structurally different congeneric grasses. We established 40, 2.25‐ha plots ...
... The establishment of complementary native grass species could be an ideal method of dealing with existing problems of veld degradation and inadequate forage quantity and quality of pastures. A greenhouse experiment was conducted to evaluate the effect of native grasses viz., Anthephora pubescens, Cenchrus ciliaris, Chloris gayana, Dactylis glomerata, Digitaria eriantha, Eragrostis curvula, Festuca ...
... The invasion of Lehmann lovegrass (Eragrostis lehmanniana Nees) in rangelands of Chihuahua, Mexico, has resulted in a need for revegetation to recover lost forage productivity. Thus, new knowledge on generating alternatives to improve these invaded grasslands is of great importance. This study evaluated seedbeds prepared with unconventional tillage implements and seeded with a grass mixture to red ...
... Recently, in the mid-upper reach of Japanese rivers, due to artificial impacts such as dam construction, original gravel bar environments and endemic plants have been disappearing, meanwhile alien plant communities have been expanding. As a countermeasure against these issues, gravel bar restoration project started in Kinugawa River. In the present study, vegetation transition was investigated fro ...
... The essential oil composition of Bothriochloa velutina has been studied. The principal compounds of essential oils of three South American endemics, B. eurylemma, B. meridionalis and B. velutina were isolated. In laboratory bioassays, the principal compounds inhibited the seed germination and root and shoot growth of lettuce (Lactuca sativa L.), maize (Zea mays L.), wintergreen paspalum (Paspalum ...
... Acid mine drainage (AMD) was used for the pre-treatment of indigenous South African grass (Eragrostis curvula), and compared to H₂SO₄ (1 wt%) pre-treatment. The optimal pre-treatment duration were investigated and found to be 1 day for H₂SO₄ and 3 days for AMD pre-treatment. The optimal biomass solid loadings were found to be 20 wt% for both pre-treatment methods. Additionally, enzymatic hydrolysi ...
... In grassland ecosystems, invasions by nonnative grasses typically decrease floristic diversity and structural heterogeneity in ways that alter the quantity and quality of habitat for animals. Grassland arthropods that rely directly on herbaceous plants for food, shelter, or as substrates for reproduction are especially vulnerable to these invasions because many have evolved specialized relationshi ...
... Agronomic surveys of summer weed species are necessary to identify future research directions for optimal weed control, but usually focus on agricultural fields in a single season. To survey all species in the absence of weed control measures and determine species variability between seasons, a survey of 133 sites was conducted on roadsides adjoining agricultural fields throughout the Western Aust ...
Eragrostis curvula; Themeda triandra; buried seeds; canopy; correlation; drought; ecological restoration; grasses; grasslands; herbicides; interviews; introduced plants; invasive species; land degradation; long term experiments; overgrazing; prediction; soil fertility; species diversity; spot spraying; woodlands; New South Wales
Abstract:
... Globally the prevalence and impact of invasive non‐native plant species is increasing rapidly. Experimentally based research aimed at supporting management is limited in its ability to keep up with this pace, partly because of the importance of understanding historical abiotic and biotic conditions. Contrastingly, landholders are in unique positions to witness species turnover in grasslands, adapt ...
Angus; Eragrostis curvula; Nassella tenuis; absorption; antagonists; beef; blood serum; calcium; chemical analysis; farms; forage; herds; hypomagnesemia; magnesium; mortality; pastures; potassium; rain; sodium; spring; surveys; water analysis; winter; Argentina
Abstract:
... The objective of this trial was to study the serum magnesium (Mg) levels in a beefcow herd of a farm of the "caldenal" pampas zone (Argentina), and mineral concentrations in forage and drinking water. We worked with a herd of 440 Aberdeen Angus beef cows, in a farm of 2.500 has, located in Loventué department, province of La Pampa (36º 31' S, 65º 59' O). The animals grazed native pasture in winter ...
... Carpilis barberi (Blatchley), Ptochiomera nodosa Say, Sisamnes claviger (Uhler), and S. contractus Distant are related seed bugs of the lygaeoid family Rhyparochromidae that once were placed in the same genus (Ptochiomera). The habits of only P. nodosa are well known. All four species (only one specimen of S. claviger was observed) were associated with the large, dense crowns of weeping lovegrass ...
... CONTEXT: Landscape-scale conservation planning is key to the protection of biodiversity globally. Central to this approach is the development of multifunctional rural landscapes (MRLs) that maintain the viability of natural ecosystems and promote animal and plant dispersal alongside agricultural land uses. OBJECTIVES: We investigate evidence that non-native grasses (NNGs) in rangelands and other l ...
... Five crossbred beef steers (initial BW = 338.6 ± 7.8 kg) fitted with ruminal and duodenal cannulas were used in a 5 × 5 Latin square design experiment to evaluate the effects of methionine hydroxy analog (MHA) and/or yellow grease (fat) added to a molassesurea-based supplement on intake and characteristics of digestion. Steers were fed low-quality hay (long-stem lovegrass Eragrostis curvula: 3.3% ...
... Eragrostis curvula (Schrad) Nees (weeping lovegrass) represents important cultivated forage in semiarid regions, and the most useful cultivars are tetraploid and reproduce by pseudogamous diplosporous apomixis. We previously produced a series of genetically related E. curvula lines that provide a suitable system for the identification of gene(s) involved in diplosporous apomixis and ploidy, includ ...
... Bermudagrass (Cynodon dactylon), seashore paspalum (Paspalum vaginatum), and weeping lovegrass (Eragrostis curvula) were evaluated for use as a vegetative cover over a brine solid waste surface impoundment. Grass seed and sod were established at soil cap depths of 0, 5.1, 10.2, and 15.3 cm over a brine field. Results indicated that each grass species had benefits for either soil stabilization, phy ...
... This study examined the effects of two types of parent material, sandstone and limestone, on the response of vegetation growth after the 1990 Dude Fire in central Arizona. The operating hypothesis of the study was that, given the right conditions, severe wildfire can trigger vegetation type conversion. Overall, three patterns emerged: (1) oak density increased by 413% from unburned sites to burned ...
... The recent success of Aristida junciformis Trin. and Rupr. and Eragrostis curvula Schrad. Nees in dominating South African grasslands has posed agricultural and ecological threats. With the objective of examining if the current success of the species is related to allelopathy, the present study assessed the allelopathic potential of five common perennial grassland species (Poaceae). Aqueous extrac ...
Y. A. Torres; C. A. Busso; O. A. Montenegro; L. Ithurrart; H. D. Giorgetti; G. D. Rodríguez; D. Bentivegna; R. E. Brevedan; O. A. Fernández; M. M. Mujica; S. S. Baioni; L. Entío; M. Fioretti; G. Tucat
... The field performance of the native Pappophorum vaginatum, the naturalized Eragrostis curvula and various cultivars of the introduced Achnatherum hymenoides and Leymus cinereus was evaluated as potential forage resources in rangelands of arid Argentina during the warm seasons of 2007/2008 and 2008/2009. Plants of these grass species, obtained from seeds, were transplanted to the field in 2006, whe ...
... The 1990 Dude Fire on the Mogollon Rim in Arizona and the following restoration resulted in an invasion of weeping lovegrass. Ecosystem restoration required successful collaboration between federal, state, and private individuals. We used protein supplementation to redistribute grazing pressure on the rangeland and to increase use of nutrient-poor old-growth weeping lovegrass forage. We observed t ...
... This study investigated the effect of elevated CO₂ on the post‐fire resprouting response of a grassland system of perennial grass species of Cumberland Plain Woodland. Plants were grown in mixtures in natural soil in mesocosms, each containing three exotic grasses (Nassella neesiana, Chloris gayana, Eragrostis curvula) and three native grasses (Themeda australis, Microlaena stipoides, Chloris vent ...
Eragrostis curvula; Nassella trichotoma; control methods; decision making; invasive species; landscapes; mangers; models; plants (botany); population ecology; risk; weed control
Abstract:
... Management of damaging invasive plants is often undertaken by multiple decision makers, each managing only a small part of the invader's population. As weeds can move between properties and re‐infest eradicated sites from unmanaged sources, the dynamics of multiple decision makers plays a significant role in weed prevalence and invasion risk at the landscape scale. We used a spatially explicit age ...
... Perennial grasses may provide a renewable source of biomass for energy production. Biomass yield, nutrient concentrations, and nutrient removal rates of switchgrass (Panicum virgatum L.), giant miscanthus (Miscanthus x giganteus), giant reed (Arundo donax L.), weeping lovegrass [Eragrostis curvula (Shrad.) Nees], kleingrass (Panicum coloratum L.), and Johnsongrass (Sorghum halepense (L.) Pers.) we ...
... The development of techniques to estimate and map increaser grass species is critical for better understanding the condition of the rangeland and levels of rangeland degradation. This paper investigates whether canopy reflectance spectra, resampled to AISA Eagle resolution can discriminate among four increaser species representing different levels of rangeland degradation. Canopy spectral measurem ...
... Minimal quantities of ruminally degradable protein from supplements may improve supplement use efficiency of ruminants grazing dormant forages. In Exp. 1, N retention, ruminal NH3, serum urea N, and NDF digestibility were evaluated for 12 ruminally cannulated cows (Bos spp.) in an incomplete Latin Square design with 3 periods of 42 d each. Cows were fed weeping lovegrass [Eragrostis curvula (Schra ...
Aster kantoensis; Eragrostis curvula; introduced species; rivers; seedlings; vegetation; Japan
Abstract:
... To assess the vegetation status and substrate condition on seedling survival and flowery of an endangered plant species Aster kantoensis, I carried out an in situ seed-sowing experiment in the gravelly/sandy floodplain of the Kinu River, central Japan. The coverage of plant species, especially that of an alien species Eragrostis curvula, increased, and the subsequent reduction in the relative phot ...
... Weeping lovegrass [Eragrostis curvula (Schrad.) Nees] supports extensive beef cattle operations in arid and semiarid environments worldwide. This perennial grass is preferred in low production areas of Argentina because it has a high biomass production with minimal management requirements. Therefore, we evaluated yield and nutritional value of seven different cultivars and accessions of weeping lo ...
... Increased or fluctuating resources may facilitate opportunities for invasive exotic plants to dominate. This hypothesis does not, however, explain how invasive species succeed in regions characterized by low resource conditions or how these species persist in the lulls between high resource periods. We compare the growth of three co-occurring C4 perennial bunchgrasses under low resource conditions ...
Yanina A. Torres; Carlos Busso; Oscar Montenegro; Leticia Ithurrart; Hugo Giorgetti; Gustavo Rodríguez; Diego Bentivegna; Roberto Brevedan; Osvaldo Fernández; María de la Merced Mujica; Sandra Baioni; José Entío; María Nélida Fioretti; Guillermo Tucat
... Pappophorum vaginatum is the most abundant C₄, warm-season perennial grass in rangelands of northeastern, arid Patagonia, which is often exposed to continuous grazing. Eragrostis curvula is the only naturalized, C₄ warm-season genotype that has successfully established from seed during moist years in the study region, that is characterized by a scarce forage availability to livestock during the sp ...
... The smoke-derived chemical karrikinolide commonly triggers seeds in the Brassicaceae, Solanaceae and Asteraceae families to germinate, yet species in the Poaceae â another major understorey and weed family â have responded to the chemical with mixed results. This study aimed to understand why some grass species respond to karrikinolide while others do not. Using a field-based seed-burial trial ...
... The largest population of the Argentinean Pampas deer Ozotoceros bezoarticus celer is found in the semiarid grasslands of the San Luis province. Despite relatively high deer numbers in the region, there has been concern that expansion of farming practices could displace the species. Since the 1990’s, cattle breeding has intensified especially as a result of the replacement of natural grassland wit ...
... Weeping lovegrass is a forage grass cultivated in semiarid regions of the world that reproduces mainly by apomixis (diplospory), a process that involves the formation of asexual seeds and bypasses the processes of meiosis and fertilisation. The aim of this work was to evaluate and compare different techniques (cytoembryology, callose deposition, flow cytometry and progeny tests) to determine the r ...
... Switchgrass (Panicum virgatum) has been identified as a model dedicated energy crop species. After a perennial grass is established, the major variable costs are for nitrogen (N) fertilizer and harvest. Prior to establishing switchgrass on millions of ha in a particular agro-climatic region, it would be useful to determine switchgrass yield response to N and its response to harvest frequency relat ...
Cymbopogon; Eragrostis curvula; Tripsacum; canopy; erosion control; field experimentation; green tea; runoff; soil; soil erosion; water conservation; India
Abstract:
... A field experiment was conducted at Central Soil and Water Conservation Research and Training Institute, Research Centre, Udhagamandalam, The Nilgiris, Tamil Nadu, India, to evaluate vegetative barriers with Contour Staggered Trenches(CST) in new tea plantation for erosion control on 24% land slope. Vegetative barriers of Tripsacum laxum with CST and Cymbopogon flexuousus with CST were more effici ...
... Eragrostis curvula is an important forage grass in marginal regions for its capacity to grow and develop in sandy, not very fertile soils and for its drought tolerance. However, its widespread use for animal production is limited at present since it has low forage quality. In forage species, lignin content has been recognized as one of the main factors that affects this parameter. The O-methylatio ...
... Bothriochloa laguroides var. laguroides (DC.) Herter, a native bluestem of America, has been shown to produce many biologically active compounds. The allelopathic potential of aqueous extracts from roots, stems and leaves was examined. Lettuce seeds (Lactuca sativa) and maize (Zea mays), the common allelopathy bioassay systems, as well as seeds from two native species, wintergreen paspalum (Paspal ...
invasive species; indigenous species; community ecology; ecosystems; Eragrostis curvula; grazing; case studies; biomass; herbicides; soil nutrients; growing season; ecological restoration; fertilizers; livestock; ecological succession; Australia
Abstract:
... 1. Identifying the mechanisms that facilitate invasion is crucial for the design of preventative measures and understanding the invasion process, but not necessarily for the design of effective control strategies. 2. When a novel disturbance is identified as facilitating invasion, the intuitive control strategy is to restore the previous disturbance regime. This recommendation is implicitly based ...
... Campuloclinium macrocephalum is an Asteraceous alien weed that invades roadside vegetation and grassland in South Africa. The role of allelopathy and competition in its invasiveness was investigated using Eragrostis curvula (weeping lovegrass, an indigenous grass), E. tef and Lactuca sativa (lettuce) as test species. Trials were conducted in Petri-dishes, pots and in the field. Root and shoot extr ...
... We investigated invasion impacts of a grass species (Eragrostis curvula) on native grasshoppers by periodic censuses of these insects on gravelly floodplains of the Kinu River, Japan. Our hypothesis was that there are greater impacts on natives when they are habitat specialists, as opposed to habitat generalists. The study area comprised two main habitat types: gravelly areas and riparian grasslan ...
... To examine the relative importance and interactions of trophic and non-trophic effects of plant invasions on herbivores, we investigated how the invasion of weeping lovegrass Eragrostis curvula impacted Eusphingonotus japonicus, a food generalist grasshopper endemic to gravelly floodplains with sparse vegetation in Japan. Field observations and laboratory experiments showed that the grasshopper fe ...
... Weeping lovegrass (Eragrostis curvula (Schrad.) Nees; Poaceae), an African species planted in the southern United States for erosion control and forage, has been colonized by a diversity of native planthoppers. Collecting data and previously recorded host plants are provided for 26 species of Fulgoroidea in 12 genera and 5 families; nymphs of 13 fulgoroid species were observed. New state records a ...
... Knowledge remains limited about how fungal pathogens that colonize living plant cells translocate effector proteins inside host cells to regulate cellular processes and neutralize defense responses. To cause the globally important rice blast disease, specialized invasive hyphae (IH) invade successive living rice (Oryza sativa) cells while enclosed in host-derived extrainvasive hyphal membrane. Usi ...
... Soil mineral nitrogen (N) profiles during the growing season and changes in total soil N and available N after 3-4 years were examined under 9 different pasture swards containing annual legumes, lucerne (Medicago sativa L.), or one of 4 perennial grasses at 2 sites representative of the low and medium rainfall belt of south-eastern Australia. The effect of the presence of phalaris (Phalaris aquati ...
... Carbon (C) and nitrogen (N) fluxes are largely controlled by the small but highly bio-reactive, labile pools of these elements in terrestrial soils, while long-term C and N storage is determined by the long-lived recalcitrant fractions. Changes in the size of these pools and redistribution among them in response to global warming may considerably affect the long-term terrestrial C and N storage. H ...
... A USDOE and USDA study concluded that more than 20 million U.S. hectares of cropland, idle cropland, and cropland pasture could be converted from current uses to the production of perennial grasses from which biomass could be harvested for use as biorefinery feedstock. This study was conducted to determine the most efficient species, level of N, and harvest frequency from among four perennial gras ...
... In many species polyploidization involves rearrangements of the progenitor genomes, at both genetic and epigenetic levels. We analyzed the cytosine methylation status in a 'tetraploid-diploid-tetraploid' series of Eragrostis curvula with a common genetic background by using the MSAP (Methylation-sensitive Amplified Polymorphism) technique. Considerable levels of polymorphisms were detected during ...
... The molecular nature of gene expression during the initiation and progress of diplosporous apomixis is still unknown. Moreover, the basis of the close correlation between diplospory and polyploidy is not clarified yet. A comparative expression analysis was performed based on expressed sequence tags (ESTs) sequencing and differential display in an Eragrostis curvula diplosporous tetraploid genotype ...
... BACKGROUND AND AIMS: Thesium chinense is a hemiparasitic plant that is common in grassland habitats of eastern Asia. Although the physiology of Thesium has been well studied in attempts to control its weedy habit, there have been few ecological investigations of its parasitic life history. Thesium chinense is thought to parasitize species of Poaceae, but evidence remains circumstantial. METHODS: A ...
... Warm-season grasses and legumes have the potential to provide forage throughout the Mediterranean summer when there are high temperatures and low rainfall and when cool-season grasses become less productive. Twenty-nine non-native, warm-season pasture species (twenty-three grasses and six legumes) were assessed for their adaptability to the coastal plain of southern Italy in terms of their product ...
... Molecular markers were used to analyze the genomic structure of an euploid series of Eragrostis curvula, obtained after a tetraploid dihaploidization procedure followed by chromosome re-doubling with colchicine. Considerable levels of genome polymorphisms were detected between lines. Curiously, a significant number of molecular markers showed a revertant behavior following the successive changes o ...
... To test the hypothesis that nonbuoyant seeds transported by river water are deposited with mineral sediment particles that have a similar fall velocity through water, we examined the relationship between the size of sediment deposited by a flood and the density of the deposited seeds of a invasive alien plant, Eragrostis curvula. The average estimated fall velocity of the seeds was 2.93 cm/s, and ...
... Livestock grazing may or may not be an exogenous disturbance facilitating the spread of exotic grasses, perhaps depending on the historical importance of native ungulates in a particular grassland. We compared canopy cover of native grasses and two African lovegrasses (Eragrostis spp.) over 22 years in ungrazed versus livestock grazed desert grasslands in southeastern Arizona. The exotics comprise ...
... BACKGROUND AND AIMS: Previous studies on grass leaf tensile properties (behaviour during mechanical stress) have focused on agricultural applications such as resistance to trampling and palatability; no investigations have directly addressed mechanical properties during water stress, and hence these are the subject of this study. METHODS: Critical (lethal) relative water contents were determined f ...
primary productivity; Tristachya; potassium chloride; phosphorus; grasslands; forbs; soil acidification; on-farm research; Magnoliopsida; soil pH; Themeda triandra; grasses; community structure; species diversity; Eragrostis curvula; soil productivity; liming; nitrogen; nutrient availability; Megathyrsus maximus; South Africa
Abstract:
... Question: What is the long-term influence of nutrient availability, productivity and soil pH on grassland community organization?Location: Ukulinga research farm, KwaZulu-Natal, South Africa.Methods: The influence of fertilization on soil pH, nitrogen (N) and phosphorus (P) on variation in plant traits, community composition and species richness were examined in a 50-year grassland fertilization e ...
Anthephora; Cenchrus ciliaris; Digitaria eriantha; Eragrostis curvula; land restoration; plant density; plows; rangelands; sandy clay soils; sandy soils; species diversity; South Africa
Abstract:
... Semi-arid rangelands, which have retrogressed beyond a certain threshold and could not rest-recover, can only be restored by mechanical inputs helping the re-establishment of vegetation. Therefore, different over-sown species and mechanical restoration methods (hollows-dyker plough, furrows-ripper/sub-soiler and walking-stick planter) were evaluated for the restoration of bare areas on both a sand ...
Eragrostis curvula; erosion control; wind erosion; soil water content; width; Argentina
Abstract:
... Cultivation strips of different widths were compared in the southwestern area of the Argentinean semiarid region to evaluate their efficiency in controlling wind erosion and soil water storage. The strips ranged in width from L to 4L, with L being the length of the field free of barriers, as calculated by the wind erosion equation (WEQ). The movement of soil particles and the moisture level in the ...
... A greenhouse experiment was conducted to investigate the effects of moderate (14 cm) vs. severe (7 cm) defoliation on tiller recruitment and mortality within the interior and on the perimeter of weeping lovegrass (Eragrostis curvula) tussocks. Tiller number per marked shoot within the interior was significantly greater in plants defoliated at 14-cm stubble height than at 7-cm stubble height (2·37 ...
soil organic carbon; pastures; organic compounds; nitrogen; Medicago sativa; soil degradation; chemical analysis; Eragrostis curvula; soil fertility; soil aggregates; Medicago truncatula; grassland soils; New South Wales
Abstract:
... To compare the effectiveness of different pasture species in restoring soil quality, changes in concentration and quality of soil organic carbon (C) were measured in the surface 10 cm of an Oxic Paleustalf (red earth) in the semiarid area of New South Wales, Australia, at the end of 4 years under lucerne (Medicago sativa cv. Trifecta), Consol lovegrass (Eragrostis curvula), and barrel medic (Medic ...
... Tef is an important cereal crop in Ethiopia. This study was conducted to investigate (1) genetic diversity within and among three Eragrostis species (E. tef, E. pilosa and E. curvula), and (2) the relationship between E. tef, E. pilosa and E. curvula. A total of 630 AFLP markers were obtained, out of which 58% (368) were polymorphic, using 10 primer combinations. The three species were separated d ...
... Prescribed burning is a common management practice applied to weeping lovegrass [Eragrostis curvula (Schrad.) Nees], but little is known about tiller density and demographic response to burning. Our objectives were to determine fire effects on weeping lovegrass tiller density and demographics on a site, seeded in 1989, in western Texas. Tillers were sampled at 14-d intervals in 1996 and 1997 to de ...
carbon dioxide; endangered species; stems; artificial shade; gas exchange; microclimate; introduced species; air temperature; light intensity; floodplains; Eragrostis curvula; plant competition; leaves; photosynthesis; habitats; roots; Japan
Abstract:
... Aster kantoensis , an endangered plant species, is endemic to gravelly floodplains of a few large rivers in central Japan. In recent years, competitive exclusion by alien perennial grasses in its natural habitat has been suspected to be one of the major factors threatening this species. In the River Kinu, increased shading by the perennial alien grass Eragrostis curvula reduces light availability ...
... Tef, [Eragrostis tef(Zucc) Trotter, is a major cereal crop in Ethiopia. The objective of this study was to investigate the genetic relationships among tef accessions by the amplified fragment length polymorphism (AFLP) technique. Forty-seven accessions of tef and one accession each of E. pilosa and E. curvula were analyzed. A total of 316 polymorphic DNA fragments across the three Eragrostis speci ...
Cynodon dactylon; Eragrostis curvula; Eragrostis tef; biomass; coal; composts; cost effectiveness; grasses; land restoration; leaves; livestock; metals; models; perennials; selenium; toxic substances; toxicity; vegetation cover; South Africa
Abstract:
... Eight medium amendments were conducted on top of a fine ash coal dump (i) to evaluate a few cost-effective treatments that could determine the minimum fertility status required for the local ash to support the establishment of a viable vegetation cover, and (ii) to select suitable grass species that would establish on the ash and could serve as a foundation for long-term rehabilitation. Degree and ...
... Callose, a β-l,3-glucan, is synthesized and deposited in the walls of megaspore mother cells (MMCs) of angiosperms that produce either normal monosporic (>90% of all angiosperm species) or bisporic embryo sacs. Such deposits are absent in angiosperms that produce tetrasporic embryo sacs and were recently shown to be absent in diplosporous Elymus rectisetus (Nees in Lehm.) A. Löve & Connor, Tripsac ...
... Weeping lovegrass, Eragrostis curvula (Schrad.) Nees, was introduced to the Americas for soil conservation. It is a useful forage only if intensively managed. Apomictic lovegrass hybrids, developed from introductions with higher forage quality, need to be evaluated in multiple environments to determine their potential. Studies were to be established in Argentina the same year seed was produced in ...
... The PWL2 gene, isolated from a Magnaporthe grisea rice pathogen, prevents this fungus from infecting a second host grass, weeping lovegrass. We have investigated the distribution of sequences homologous to PWL2 in M. grisea strains isolated from diverse grass species. Multiple PWL2 homologs with varying degrees of sequence homology were identified. The presence of PWL2 homologs does not correlate ...
... Apomictic plant breeding is being practiced in several turf and forage grasses. Variation released during apomictic breeding has been discussed, but few reports have quantified this variation. Our objectives were to characterize variation among lovegrass, Eragrostis curvula (Schrad.) Nees, hybrids and their parents, compare parents and hybrids, and determine interrelationships among the characteri ...