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In vitro antimicrobial and larvicidal properties of wild Ricinus communis L. in Mauritius

Asian Pacific Journal of Tropical Biomedicine 2016年第2期6卷 100-107页

作者： Sillma Rampadarath Daneshwar Puchooa Faculty of Agriculture University of Mauritius

Objective: To explore the phytochemical and antimicrobial activities as well as the insecticidal properties of the different sections of Ricinus communis(castor) plant in Mauritius.Methods: Qualitative and quantitative methods were used for the determination of phytochemicals in the crude leaves, pericarp, seeds, bark and root extracts obtained by using polar and non-polar solvents. The disc diffusion and micro-dilution methods were used to evaluate the antimicrobial activities of the crude solvent extracts against 13 microorganisms. The insecticidal properties of the crude extracts on larvae of Bactrocera zonata(Diptera: Tephritidae), which caused important economic losses to local fruits were also investigated.Results: All the extracts from the different parts of the plant showed antimicrobial activity against most tested microorganisms. The polar solvents' extracts of the fully mature parts of the castor plant were active against the Pseudomonas aeruginosa(ATCC 27853),Escherichia coli(E. coli)(ATCC 25922), E. coli(0145:H28 Acc. No. CP006027.1) with inhibition zones ranging from 16 mm to 19 mm and against Bacillus cereus(ATCC11778)(B. cereus), Listeria innocua(ATCC 33090)(L. innocua). Lowest microbial inhibitory concentration was recorded for B. cereus, L. innocua, Staphylococcus aureus(ATCC 29213), E. coli(ATCC 25922) and Proteus mirabilis strain(NCTC 11938) with value of 3.2 mg/m L. The most active extract against both Gram-negative and Grampositive bacteria was extracted from the fully mature pericarps and it was the most active against E. coli(ATCC 25922), B. cereus, L. innocua and Staphylococcus aureus(ATCC 29213). In addition, the extracts obtained by using polar solvent and fully mature leaves demonstrated the strongest larvicidal activity against Bactrocera zonata(100%).Conclusions: Ricinus communis(castor) plant extracts possess larvicidal properties providing an effective eco-friendly control for fruit flies. The antimicrobial results justify the use of this plant in traditional medicine and the pract

关键词： Antibacterial activity Larvicidal property Minimum inhibition Ricinus communis

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PcTGD,a highly expressed gene in stem,is related to water stress in reed (Phragmites communis Trin.)

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Chinese Science Bulletin 2001年第10期46卷 850-854页

作者： CHENG Youfa PU Tongliang XUE Yongbiao ZHANG Chenglie Institute of Botany&Plant Physiology School of Life Science of Lanzhou UniversityLanzhou 730000China Institute of Developmental Biology Chinese Academy of SciencesBeijing 100080China

To compare differential gene expression among three ecotypes of reed (Phragmites communis Trin.), dune reed (DR), heavy-salt meadow reed (HSR) and light-salt meadow reed (LSR), mRNA transcripts were displayed by cDNA-AFLP (amplified fragment length polymorphisms). The result revealed that a relatively small number of genes are likely involved in adaptations of DR and HSR to stresses. A full-length cDNA encoding dTDP-D-glucose dehydratase gene (PcTGD) was subsequently cloned from DR. Northern blot analysis showed that it is highly expressed in stem as well as rhizoma of the three ecotypes. However, its expression in DR stem was much higher than that of the other two ecotypes. After the removal of water stress, the expression of PcTGD was significantly reduced, suggesting that it possibly plays a role in adaptation of DR to water stress through an osmotic regulation mechanism.

关键词： reed (Phragmites communis Trin.) water stress dTDP-D-glucose dehydratase (PcTGD).

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Exploration of larvicidal and adult emergence inhibition activities of Ricinus communis seed extract against three potential mosquito vectors in Kolkata,India

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Asian Pacific Journal of Tropical Medicine 2010年第8期3卷 605-609页

作者： Shyamapada Mandal Department of Zoology Gurudas CollegeNarkeldangaKolkata-700 054India

Objective:To determine the larvicidal and adult emergence inhibition activities of castor （Ricinus communis） seed extract against three potential mosquito vectors Anopheles stephensi（An. slephensi）,Culex quinquefasciatus（Cx.quinquefasciatus） and Aedes albopictus（Ae.albopictus） in India.Methods:The R.communis seed extract was tested,employing WHO procedure,against fourth larval instars of the three mosquito species for 24 h and larval mortalities were recorded at various concentrations（2-64μg/mL）:the 24 h LC50 values of the R.communis seed extract were determined following Probit analysis.The larval killing,antipupation and adult emergence inhibition rates of the test extract,using a single concentration of 2μLC50,were studied at different time periods（24-72 h）:the extract toxicity was tested against a fish.Oreochromis niloticus（O.niloticus）.Results:The R.communis seed extract exhibited larvicidal effects with 100%killing activities at concentrations 32-64μg/mL,and with LC50 values 7.***.11.64 and 16.84μg/mL for Cx.quinquefasciatus,An.stephensi and Ae.albopictus larvae,respectively. When the larvae were treated with the extract at a single concentration of 2×LC50,significant differences were observed,compared to control groups,in rate of pupation（Pcommunis seed extract provided an excellent potential for controlling An.stephensi,Cx.quinquefasciatus and Ae. albopictus mosquito vectors.

关键词： Ricinus communis Mosquito vectors Larvicidal activity Probit analysis Adult emergence inhibition

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In vitro control of Staphylococcus aureus (NCTC 6571) and Escherichia coli (ATCC 25922) by Ricinus communis L.

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Asian Pacific Journal of Tropical Biomedicine 2012年第9期2卷 717-721页

作者： E.Christy Jeyaseelan P.T.Justin Jashothan Department of Botany Faculty of ScienceUniversity of Jaffna

Objective:To evaluate antibacterial activity of hot and cold ethanol and methanol leaf extracts of Ricinus communis L(R.communis)against Staphylococcus aureus(S.aureus)(NCTC 6571)and Escherichia coli(E.coli)(ATCC 25922).Methods:Leaf powder of R.communis L.was extracted with hot(in Soxhlet)and cold ethanol and methanol,separately.The antibacterial activity of the extracts was determined by agar well diffusion and macro broth dilution methods.The extracts were also subjected to phytochemical analysis.Results:All the four test extracts showed inhibition on both S.aureus and E.coli.Hot and cold ethanol extracts revealed significantly(P<0.05)higher inhibition on S.aureus than methanol extracts,and the hot ethanol extract had the lowest minimum inhibitory concentration(MIC)and minimum bactericidal concentration(MBC)values(5 mg/mL and 10 mg/mL,respectively).E.coli was highly inhibited by hot extracts of both ethanol and methanol with the MIC and MBC of 40 mg/mL and 80 mg/mL,respectively.Phytochemical analysis revealed the presence of saponins,cardiac glycosides,tannins,flavonoids and terpenoids in all test extracts.Conclusions:This study demonstrates that the hot and cold methanol and ethanol extracts are potential sources for control of S.aureus and E.coli.Especially,the hot and cold extracts of ethanol are more inhibitive against 5.aureus even at lower concentration.Further study is needed to identify the specific bioactive compounds,their mode of action and their nontoxic nature in vivo condition.

关键词： Ricinus communis Antibacterial activity Staphylococcus aureus Escherichia coli Extract Minimum inhibitory concentration Minimum bactericidal concentration

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Antimicrobial potential of Ricinus communis leaf extracts in different solvents against pathogenic bacterial and fungal strains

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Asian Pacific Journal of Tropical Biomedicine 2012年第12期2卷 944-947页

作者： Rabia Naz Asghari Bano Department of Plant Sciences Quaid-i-Azam University

Objective:To investigate the in vitro antimicrobial activities of the leaf extract in different solvents viz.,methanol,ethanol and water extracts of the selected plant Ricinus communis.Methods:Ager well diffusion method and agar tube dilution method were carried out to perform the antibacterial and antifungal activity of methanol,ethanol and aqueous extracts.Results:Metbanol leaf extracts were found to be more active against Gram positive bacteria(Bacillus subtilis:ATCC 6059 and Staphylococcus aureus:ATCC 6538)as well as Gram negative bacteria(Pseudomonas aeruginosa:ATCC 7221 and Klebsiella pneumoniae)than ethanol and aqueous leaf extracts.Antifungal activity of methanol and aqueous leaf extracts were also carded out against selected fungal strains as Aspergillus fumigatus and Aspergillus flavus.Methanolic as well as aqueous leaf extracts of Ricinus communis were effective in inhibiting the fungal growth.Conclusions:The efficient antibacterial and antifungai activity of Ricinus communis from the present investigation revealed that the methanol leaf extracts of the selected plant have significant potential to inhibit the growth of pathogenic bacterial and fungal strains than ethanol and aqueous leaf extracts.

关键词： Antibacterial Antifungal Relative percentage inhibition Ricinus communis Methanol Ethanol

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Antinociceptive activity of Ricinus communis L.leaves

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Asian Pacific Journal of Tropical Biomedicine 2011年第2期1卷 139-141页

作者： Dnyaneshwar J Taur Maruti G Waghmare Rajendra S Bandal Ravindra Y Patil Department of Pharmacognosy SVPM's College of Pharmacy Department of Pharmaceutical Chemistry SVPM's College of Pharmacy Department of Pharmacognosy PDEA's Shankarrao Ursal College of Pharmaceutical Sciences and Research Center

Objective:To evaluate the antinociceptive activity of the methanol extract of Ricinus communis leaves(MRCL).Methods:Antinociceptive activity was evaluated using acetic acid induced writhing test,formalin induced paw licking and tail immersion method in mice at doses of 100,125 and 130 mg/kg bw.Results:The results indicated that MRCL exhibited considerable antinociceptive activity against three classical models of pain in mice.Preliminary phytochemical analysis suggested the presence of saponin,steroids and alkaloids.Conclusions:It can be concluded that MRCL possesses antinociceptive potential that may be due to saponin,steroids and alkaloids in it.

关键词： Ricinus communis Analgesic Antinociceptive Writhing Formalin

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Phytochemical analysis,hypotensive effect and antioxidant properties of Myrtus communis L.growing in Algeria

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Asian Pacific Journal of Tropical Biomedicine 2015年第1期5卷 19-28页

作者： Amel Bouaziz Seddik khennouf Mussa Abu zarga Shtaywy Abdalla Abderahmane Baghiani Noureddine Charef Laboratory of Phytotherapy Applied to Chronic Diseases Department of Biology and Animal PhysiologyFaculty of Nature and Life SciencesUniversity Setif I Natural Products Laboratory Department of ChemistryFaculty of Sciencethe University of Jordan Animal & Human Physiology Laboratory Department of BiologyFaculty of Sciencethe University of Jordan Laboratory of Applied Biochemistry Department of BiochemistryFaculty of Nature and Life SciencesUniversity Setif 1

Objective:To analyze Myrlus communis chemically and evaluate the hypotensive effects and antioxidant properties of methanol,chloroform,ethyl acetate and aqueous extracts from the leaves of this plant.Methods:Total phenolic and flavonoid contents as well as the antioxidant potential of methanol,chloroform,ethyl acetate and aqueous extracts have been investigated by using different in vitro methods.The hypotensive effects of methanol and ethyl acetate extracts were evaluated in anaesthetized rats by using the method of invasive blood pressure recording.Moreover,ethyl acetate extract was subjected to analysis by different chromatographic methods in order to identify new compounds.Results:Chemical analysis of ethyl acetate extract revealed the presence of myrecitin-3-O-α-rhamnoside.Ethyl acetate extract was found to have the highest total phenolic and total flavonoid contents with the values of 435.37 ma gallic acid equivalents/g dried weight and 130.75 mg quercetin equivalent/g dried weight,respectively.Ethyl acetate extract also exhibited the highest activity in scavenging 2.2-diphenyl-1-picrylhydrazyl.2,2'-azinobis-(3-ethylbenzthiazoline-6-sulfonic acid),hydroxy]radical and reducing power:whereas,methanol extract exhibited higher chelating activity than ethyl acetate extract did.Chloroform was found to be strong inhibitor of lipid peroxidation in β-carotene bleaching assay(91.19%).ferric thiocyanate method(87.55%).and thiobarbituric acid method(82.59%) as compared to butylated hydroxytoluene.Intravenous administration of methanol and ethyl acetate extract(0.04 to 12 mg/kg body weight) decreased the maximum mean arterial blood pressure with values of 20.6%and 32.49%at 12 mg/kg body weight,respectively in anesthetized rats.Conclusions:This study provides a scientific basis for the use of Myruts communis in traditional medicine as hypertensive agent as well as additional resources for natural antioxidants.

关键词： Myrtus communis Phytochemistry Phenolic content Antioxidant Hypertension

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DNA Barcoding of Ricinus communisfrom Different Geographical Origin by Using Chloroplast matKand Internal Transcribed Spacers

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American Journal of Plant Sciences 2012年第9期3卷 1304-1310页

作者： Mohamed Enan Mohammad Al-Deeb Nael Fawzy Khaled Amiri Department of Biology UAE University Al-Ain UAE Flora and Phyto-Taxonomy Research Department Horticultural Research Institute Agricultural Research Center Giza Egypt

Ricinus communis have attracted considerable attention because of its specific industrial and pharmacological activities. DNA barcodes can be used as reliable tools to facilitate the identification of medicinal plants for the safe use, quality control and forensic investigation. In this study, the differential identification of eight accessions of R. com-munis was investigated through DNA sequence analysis of two candidate DNA barcodes. The nucleotide sequence of internal transcribed spacers (ITS2) and chloroplast maturase gene (matK) have been determined to construct the phylogenetic tree. The phylogenetic relationships of accessions based on the nrITS2 region and partial matK region showed that all accessions in this study were related to three geographical origins. Based on sequence align-ment and phylogenetic analyses we concluded that the ITS2 sequences can distinguish R. communis accessions from different geographical distributions.

关键词： DNA Barcoding Internal Transcribed Spacer Maturase K Ricinus communis

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Removal of Malachite Green Dye from Aqueous Solutions onto Microwave Assisted Zinc Chloride Chemical Activated Epicarp of Ricinus communis

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Journal of Water Resource and Protection 2013年第2期5卷 222-238页

作者： M. Makeswari T. Santhi Department of chemistry Karpagam University Coimbatore India

Competitive adsorption of malachite green (MG) in single and binary system on microwave activated epicarp of Ricinus communis (MRC) and microwave assisted zinc chloride activated epicarp of Ricinus communis (ZRC) were analyzed. The preparation of ZRC from Ricinus communis was investigated in this paper. Orthogonal array experimental design method was used to optimize the preparation of ZRC. Optimized parameters were radiation power of 100 W, radiation time of 4 min, concentration of zinc chloride of 30% by volume and impregnation time of 16 h, respectively. The MRC and ZRC were characterized by pHzpc, SEM-EDAX and FTIR analysis. The effect of the presence of one dye solution on the adsorption of the other dye solution was investigated in terms of equilibrium isotherm and adsorption yield. Experimental results indicated that the uptake capacities of one dye were reduced by the presence of the other dye. The adsorption equilibrium data fits the Langmuir model well and follows pseudo second-order kinetics for the bio-sorption process. Among MRC and ZRC, ZRC shows most adsorption ability than MRC in single and binary system.

关键词： Epicarp of Ricinus communis Microwave Heating Zinc Chloride Binary System Equilibrium Isotherm

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Juniperus communisExtract Effect on Bronze Corrosion in Natural 0.5 M Chloride Medium

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Journal of Materials Science and Chemical Engineering 2015年第11期3卷 21-29页

作者： Refka Ben Channouf Nebil Souissi Nizar Bellakhal Carthage University Institut National des Sciences Appliquées et Technologie Unité de Recherche “Catalyse Electrochimie Nanomatériaux et leurs Applications et Didactique” Centre Urbain Nord de Tunis Tunis Tunisia Tunis El Manar University Institut Préparatoire aux Etudes d’Ingénieurs El Manar Campus Universitaire El Manar Tunis Tunisia

The effect of Juniperus communis (JC) extract on the inhibition of bronze corrosion in aqueous chloride solution was studied by electrochemical polarization methods. The variation of two experimental factors such as the chloride concentration and the temperature allows us to deduce the kinetics parameters of this process (Ea = 65.7 kJ•mol–1). Thermodynamic calculations indicated that JC adsorption on bronze surface obeyed Arrhenius adsorption isotherm and was characterized by an endothermic process (ΔH* = 54.7 kJ•mol–1).

关键词： Synthetic Bronze Corrosion Inhibition Green Inhibitor Juniperus communis

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