833 research outputs found
Chemical and biological investigations of Delonix regia (Bojer ex Hook.) Raf.
Get PDFU radu je opisana izolacija pet sastojaka petroleterske i diklormetanske frakcije metanolnog ekstrakta kore biljke Delonix regia: lupeol (1), epilupeol (2), β-sitosterol (3), stigmasterol (4) i p-metoksibenzaldehid (5). Nadalje, testirano je antimikrobno djelovanje različitih ekstrakata difuzijskom metodom na disku (15 μg mm2). Zone inhibicije za sastojke topljive u petroleteru, tetraklormetanu i diklormetanu bile su 914 mm, 1113 mm, odnosno 920 mm, dok je zona inhibicije standarda kanamicina bila 2025 mm. U biološkom pokusu smrtnosti morskih kozica najveću toksičnost pokazali su spojevi topljivi u tetraklormetanu (LC50 = 0,83 μg mL1), dok je topljivost sastojaka topljivih u petroleteru i diklormetanu bila LC50 14,94, odnosno 3,29 μg mL1, a standarda vinkristin sulfata 0,812 μg mL1. Ovo je prvo izvješće o izolaciji sastojaka, antimikrobnom djelovanju i citotoksičnosti biljke D. regia.In this study five compounds, lupeol (1), epilupeol (2), β-sitosterol (3), stigmasterol (4) and p-methoxybenzaldehyde (5) were isolated from the petroleum ether and dichloromethane fractions of a methanolic extract of the stem bark of Delonix regia. Antimicrobial screening of the different extracts (15 μg mm2) was conducted by disc diffusion method. The zones of inhibition demonstrated by the petroleum ether, carbon tetrachloride and dichloromethane fractions ranged from 914 mm, 1113 mm and 920 mm, respectively, compared to kanamycin standard with the zone of inhibition of 2025 mm. In brine shrimp lethality bioassay, the carbon tetrachloride soluble materials demonstrated the highest toxicity with LC50 of 0.83 μg mL1, while petroleum ether and dichloromethane soluble partitionates of the methanolic extract revealed LC50 of 14.94 and 3.29 μg mL1, respectively, in comparison with standard vincristine sulphate with LC50 of 0.812 μg mL1. This is the first report on compounds separation from D. regia, their antimicrobial activity and cytotoxicity
Range-wide analysis of the spatial distribution and genetic diversity of Delonix s.l. (Leguminosae) in Madagascar : enhancing herbarium-based conservation assessments
No full textDespite their ecological and economic importance, the majority of plant species and
their conservation status are poorly known. Only 4% of plants have been assessed
globally and listed on the IUCN Red List of Threatened Species; and without plant
conservation assessments, many plant species will not feature in conservation
planning.
Herbarium collection information can significantly increase the number of plant
conservation assessments. Thus, the aims of this thesis were: (1) to investigate how
the quality of herbarium-based conservation assessments can be optimised; (2) to
assess the extent to which herbarium-based conservation assessments reflect the
reality on the ground; and (3) to scientifically validate genetic and spatial underpinning
of IUCN criteria.
Preliminary range-based assessments of the Leguminosae of Madagascar achieved a
result consistent with the final conservation rating for over 95% of species when using
up to fifteen herbarium specimens. Bioclimatic modelling of range shifts based on
future climate change predicted that, in the worst case scenario, up to one third of
endemic Leguminosae in Madagascar will be threatened with extinction over the next
100 years. An analysis of the population structure of species of Delonix s.l.
(Leguminosae) showed that combining spatial analysis with population genetic data
provides a more complete picture of landscape-level population dynamics and the
impacts on conservation status.
Moreover, range-wide genetic analysis of AFLP markers for four species of Delonix
demonstrated a genetic basis for IUCN categories distinguishing between threatened
and non-threatened species. Although genetic data are currently not often
incorporated in conservation assessments, they are crucial in making accurate
management decisions and creating effective action plans for conservation. Only by
using all available scientific resources can informed conservation decisions be made
and the survival of plants and their associated ecosystems be ensured
Delonix regia (Native)
No full textDelonix regia, flower. Family Caesalpiniaceae, Subclass Rosidae. Origin: Native
Delonix regia (Cultivated)
No full textDelonix regia, flowers. Family Caesalpiniaceae, Subclass Rosidae. Origin: Cultivated
Delonix regia (Native) 2
No full textDelonix regia, tree with flowers. Family Caesalpiniaceae, Subclass Rosidae. Origin: Native
954. DELONIX REGIA
No full textDelonix regia (Bojer ex Hook.) Raf. (Leguminosae), a red‐flowered, bird‐pollinated, showy tree, endemic to Madagascar, is described and illustrated for the second time in Curtis's Botanical Magazine, since it first featured in 1829
Genome and annotation of Delonix regia
No full textWe use PacBio HiFi and Hi-C data to assemble a chromosome-level genome for Delonix regia</p
Anti-Inflammatory Activity of Delonix regia (Boj. Ex. Hook)
Get PDFThe present work was to evaluate the anti-inflammatory activity of Delonix regia leaves (Family: Caesalpiniaceae). The powder of Delonix regia leaves was subjected to extraction with ethanol in soxhlet extractor. The ethanol extract after preliminary phytochemical investigation showed the presence of sterols, triterpenoids, phenolic compounds and flavonoids. The anti-inflammatory activity was studied using carrageenan-induced rat paw edema and cotton pellet granuloma at a three different doses (100, 200, and 400 mg/kg b.w. p.o.) of ethanol extract. The ethanol extract of Delonix regia leaves was exhibited significant anti-inflammatory activity at the dose of 400 mg/kg in both models when compared with control group. Indomethacin (10 mg/kg b.w. p.o) was also shown significant anti-inflammatory activity in both models
Nutritional contents of processed Delonix regia seeds incubated in vitro with Pennisetum purpureum
No full textThe effect of processing on proximate, mineral, anti-nutritional compositions, gas production characteristics, methane production, predicted metabolizable energy, organic matter digestibility and short chain fatty acids production of Delonix regia seeds incubated with Pennisetum purpureum were determined. Five treatments (T1: mixture of soaked Delonix regia seed and Pennisetum purpureum; T2: mixture of raw Delonix regia seed and Pennisetum purpureum; T3: mixture of roasted Delonix regia seed and Pennisetum purpureum; T4: mixture of boiled Delonix regia seed and Pennisetum purpureum and T5:100% Pennisetum purpureum which serves as control) were designed. In vitro gas production techniques for 24 hours were used to determine the nutritive value of processed 50% Delonix regia seed and 50% Pennisetum purpureum. The crude protein ranged from 13.38 to 15.71g/100g DM among the treatments while crude fibre was between 20.10 and 21.40g/100g DM, ether extract ranged from 1.90 to 3.12g/100g DM and ash 7.77 to 12.34g/100g DM. Calcium ranged from (2.34 - 3.61%), magnesium ranged (2.90 – 3.48%), sodium (2.05 – 2.91%) and phosphorus (0.88 – 1.12%). It was observed generally that T2 recorded the highest among the treatments while the values obtained for the heat treated seeds were lower than the raw. Oxalates ranged between (0.23% - 0.32%), phytates (0.29 – 0.43%), tannin (0.03 – 0.08%) and saponnin (0.36 – 0.49%). Methane (ml/200mg DM) production indicated T3 (50% roasted Delonix regia seed and 50% Pennisetum purpureum) was highest. The potential gas production 'a+b' ranged from 12.33 to 28.33mL/200mg DM). The highest potential gas production 'a+b' value of 28.33mL/200mg DM was obtained in T1 compared to other dietary treatment. Dry matter digestibility (DMD) ranged between 70.23 – 91.02% while the rate of fermentation was between 0.51 and 1.18ml/hr. The rate of fermentation was directly proportional to dry matter digestibility (DMD); the soaked recorded the highest value. Processing enhanced the nutritional contents of Delonix regia seeds. The result obtained showed that there were significant differences (p<0.05) among the treatments. In conclusion, soaking the seeds of Delonix regia had beter nutritional contents and has the potential for dry season feeding
Analgesic Activity of the Methanol Leaf Extract of Delonix Regia
Get PDFThe analgesic activity of the methanolic leaf extract of Delonix regia in albino Wistar mice using acetic acid –induced writhing reflex, tail immersion and hot plate experimental models was evaluated. Three test doses (200, 400 and 800 mg/kg body weight) of the extract were used while 400 mg/kg of acetylsalicyclic acid (aspirin) was used as reference drug all administered by gastric gavage. In acetic acid-induced writhing reflex model, the extract and acetylsalicyclic acid dose dependently and significantly (p< 0.0001) decreased the abdominal constriction or writhing. The extract also increased the percentage inhibition of abdominal constriction from 0% in the negative group to 80% in the highest dose of the extract (800 mg/kg) treated group. In the tail immersion model, the extract at the doses of 400 and 800 mg/kg significantly (p<0.03) increased the pain reaction time (PRT) while in the hot plate model there was no significant difference in the pre-drug pain reaction time (PRT) but the extract at the dose of 800 mg/kg significantly (p< 0.05) increased the post- drug PRT. In the tail immersion and the hot plate models, the extract at the dose of 200 mg/kg had no analgesic effect. In conclusion, the methanolic leaf extract of Delonix regia demonstrated significant analgesic activity that may be mediated through peripheral and central mechanisms.Keywords: Delonix regia, analgesic, aspirin, writhing, hot plateNigerian Veterinary Journal, VOL:33 (2) 515-52
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