| mode of action of the azasteroid antibiotic 15-aza-24 methylene-d-homocholesta-8,14-dien-3 beta-ol in ustilago maydis. | ustilago maydis sporidia treated with 0.1 mug of azasterol (15-aza-24-methylene-d-homocholesta-8,14-dien-3beta-ol) per ml appeared branched and vacuolated after 6 h of incubation. sporidial multiplication, dry weight increase, and synthesis of protein, deoxyribonucleic acid, and ribonucleic acid were only slightly or moderately inhibited during the initial 3 h of incubation. an increase of free fatty acids was observed in lipid extracts of treated sporidia after incubation for 3 h or more. ergos ... | 1979 | 383015 |
| ultrastructural changes in cladosporium cucumerinum during pathogenesis. | three ultrastructural patterns, each one associated with a different stage of pathogenesis, were observed in cladosporium cucumerinum infecting cucumber cytoledons. (i) fungal prepenetration structures (conidia and germ tubes) contained numberous lipid bodies. microbodies were abundant and often associated with lipid bodies. mitochondria were also abundant. (ii) during the invasion stage, no lipid bodies and relatively few microbodies were observed. mitochondria were abundant, but differed marke ... | 1976 | 1252998 |
| parasitological and microbiological evaluation of mixe indian medicinal plants (mexico). | medicinal plants are an important health resource in many regions of the americas and are of particular importance to many indian communities. based on a recent ethnobotanical study in mexico, we investigated the activity of 29 plant extracts against entamoeba histolytica, three bacteria (bacillus subtilis, escherichia coli, and micrococcus luteus) and two fungi (cladosporium cucumerinum and penicillium oxalicum). after separation of these extracts between ch2cl2 and h2o the resulting phases wer ... | 1992 | 1501496 |
| a new phloroglucinol derivative from hypericum calycinum with antifungal and in vitro antimalarial activity. | the new phloroglucinol derivative 1 has been isolated from the light petroleum ether extract of the aerial parts of hypericum calycinum. its structure has been established by means of 1h- and 13c-nmr spectroscopy and by noe, mhqc, and hmbc experiments on its monomethyl ether derivative 3. compound 1 was fungicidal against cladosporium cucumerinum in a tlc bioassay. in addition, this new phloroglucinol derivative was also found to exert an interesting antimalarial activity in an in vitro test sys ... | 1991 | 1818346 |
| studies of the antifungal compounds produced by erwinia herbicola. | the organic phase of a wide spectrum, antimycotic and diffusable toxin from erwinia herbicola showed a highly significant inhibitory activity against pyricularia oryzae spores in spore well bioassay. germ tube lengths were inhibited more in wells containing 5 microliters equivalent of bacterial toxin than 1 microliter. no significant difference between the germ tube in an equal mixture of dimethyl sulphoxide: ethanol and controls. thin layer chromatography using the chloroform extraction of the ... | 1990 | 2394476 |
| [microbiotest with cladosporium cucumerinum ell. and arth. for the detection of fungitoxic compounds on thin-layer plates]. | | 1984 | 6395518 |
| mutagenicity of methyl benzimidazole-2-yl carbamate (mbc) towards aspergillus nidulans (eidam) winter and cladosporium cucumerinum ellis & arth. | the ability of methyl benzimidazol-2-yl carbamate (mbc) to induce point mutations to carboxin and mbc resistance was tested in aspergillus nidulans (eidam) winter and cladosporium cucumerinum ellis & arth. a sub-lethal concentration (e.d.50) of mbc, when incorporated into a complete agar medium, induced mbc resistance in germinating conidia of a. nidulans and carboxin resistance in germinating conidia of c. cucumerinum. the significance of these findings in relation to fungicide resistance in th ... | 1981 | 7010147 |
| the ph dependence of the mutagenicity of methyl benzimidazol-2-yl carbamate (mbc) towards aspergillus nidulans (eidam) winter and cladosporium cucumerinum ellis & arth. | the ability of methyl benzimidazol-2-yl carbamate (mbc) to induce point mutations to carboxin and mbc resistance in aspergillus nidulans (eidam) winter and cladosporium cucumerinum ellis & arth. was dependent upon the ph value of the agar medium into which it had been incorporated. the relevance of this in relation to testing chemicals for a possible mutagenic activity with microorganisms is discussed. | 1981 | 7010148 |
| coprophilous fungi of the horse. | a total of 1267 microfungi, including 35 myxomycetes, were recorded from the fecal samples of the 60 horses; of these 395 were found on 20 saddle-horse feces, 363 on 20 race-horses and 509 on 20 working horses. eighty two species representing 53 genera were recorded; of these 7 were zygomycetes, 18 ascomycetes, 1 basidiomycetes and 25 fungi imperfecti: 2 myxomycetes. common coprophilous fungi are in decreasing order pilobolus kleinii, saccobolus depauperatus, mucor hiemalis, lasiobolus ciliatus, ... | 1981 | 7242651 |
| an antifungal naphthoquinone, xanthones and secoiridoids from swertia calycina. | a chemical and biological screening of 25 species of the gentianaceae family has been undertaken. both methanolic and dichloromethane extracts of swertia calycina exhibited a strong antifungal activity against cladosporium cucumerinum and candida albicans. the compound responsible for this activity has been isolated and identified as 2-methoxy-1,4-naphthoquinone. it is the first naphthoquinone to be described in gentianaceae species. lc-uv and lc-tsp-ms analysis of the crude extracts of swertia ... | 1995 | 7480185 |
| polyphenols from eriosema tuberosum. | a dichloromethane extract of the roots of eriosema tuberosum exhibited antifungal activity against cladosporium cucumerinum and candida albicans using tlc bioautography. bioassay-directed fractionation led to the isolation of four new compounds, eriosemaones a-d, together with a known compound, flemichin-d, as the active constituents. three inactive polyphenols were also isolated after methylation, together with one new chromone, eriosematin. structures were determined by spectroscopic analysis ... | 1995 | 7662271 |
| isolation of antifungal and larvicidal constituents of diplolophium buchanani by centrifugal partition chromatography. | three phenylpropanoids, myristicin [1], elemicin [2], and trans-isoelemicin [3], together with two furanocoumarins, oxypeucedanin [4] and oxypeucedanin hydrate [5], have been isolated from the leaves of diplolophium buchanani by a separation strategy involving the almost exclusive use of centrifugal partition chromatography. all five compounds were antifungal in a tlc bioautography test using cladosporium cucumerinum. compounds 1-4 exhibited larvicidal activity against aedes aegypti. | 1995 | 7760070 |
| an antifungal gamma-pyrone and xanthones with monoamine oxidase inhibitory activity from hypericum brasiliense. | a new gamma-pyrone (hyperbrasilone), three known xanthones (1,5-dihydroxyxanthone, 5-hydroxy-1-methoxyxanthone and 6-deoxyjacareubin) and betulinic acid have been isolated from a dichloromethane extract of stems and roots of hypericum brasiliense. their structures were established by spectroscopic methods (uv, ei-ms, 1h and 13c nmr) and that of the gamma-pyrone was confirmed by x-ray crystallography. hyperbrasilone and the xanthones were all antifungal against cladosporium cucumerinum, while the ... | 1994 | 7765428 |
| antifungal tests in phytochemical investigations: comparison of bioautographic methods using phytopathogenic and human pathogenic fungi. | the detection limits in two bioautographic assays have been determined for a series of antifungal compounds, including clinically used antimycotics, fungicidal agrochemicals, and various classes of secondary plant metabolites. target organisms were the filamentous fungus cladosporium cucumerinum and the yeast candida albicans. for clinical agents and agrochemicals, the detection limits in the two assays reflected to a certain extent their known spectrum of activity. most of the plant-derived com ... | 1994 | 8134415 |
| search for antifungal, molluscicidal and larvicidal compounds from african medicinal plants. | african medicinal plants provide a rich source of biologically-active natural products. by the use of simple bioassays in conjunction with an approach involving bioactivity guided fractionation, it is possible to isolate novel compounds with interesting properties. several hundred plant extracts have been submitted to different screens, including bioautography on tlc plates with the fungi cladosporium cucumerinum and candida albicans. among the other test systems are a bioassay for molluscicidal ... | 1993 | 8510471 |
| secoiridoids and antifungal aromatic acids from gentiana algida. | fractionation of an aqueous acetone extract of the whole herb of gentiana algida gave one new [2'-(o,m-dihydroxybenzyl)sweroside] and five known secoiridoids, together with anofinic acid, fomannoxin acid, sitosterol, daucosterol, stigmasterol, oleanolic acid, orientin and gentianose. the structures were determined by spectral methods and a few chemical transformations. anofinic acid and fomannoxin acid were found to be active against cladosporium cucumerinum, a plant pathogenic fungus. prelimina ... | 1996 | 8588862 |
| unusual antimicrobial compounds from aeollanthus buchnerianus. | using bioassay guided isolation, three novel 12 carbon polyoxygenated fatty acids and a novel abietane diterpene have been isolated from the chloroform extract of aerial parts of aeollanthus buchnerianus (lamiaceae). rigorous spectroscopic methods were used for compound identification. (z,z)-8zeta-acetoxy-5zeta-hydroxydodeca-2,6-dienoic acid and (z,z)-5zeta, 8zeta-dihydroxydodeca-2,6-dienoic acid inhibited the spore germination of cladosporium cucumerinum (both with minimum inhibitory dose (mid) ... | 1996 | 8608820 |
| antifungal and antibacterial chalcones from myrica serrata. | the dichloromethane extract of the leaves of myrica serrata inhibits growth of cladosporium cucumerinum, bacillus subtilis, and escherichia coli on tlc plates. activity-guided fractionation led the isolation of 2',4'-dihydroxy-6'-methoxy-3',5'-dimethylchalcone (1), 2',4'-dihydroxy-6'-methoxy-5'-methylchalcone (aurentiacin a) (2), 2',6'-dihydroxy-4'-methoxy-3',5'-dimethyldihydrochalcone (3), 2'-hydroxy-4',6'-dimethoxy-3'-methyldihydrochalcone (4), and 2', 6'-dihydroxy-4'-methoxy-3'-methyldihydroc ... | 1996 | 8720393 |
| antimicrobial abietane diterpenoids from plectranthus elegans. | two novel abietane diterpenoids have been isolated from the aerial material of plectranthus elegans and identified as 11-hydroxy-12-oxo-7,9(11),13-abietatriene and 7 alpha,11-dihydroxy-12-methoxy-8,11,13-abietatriene. their structures were determined through rigorous use of spectroscopic methods. both inhibited spore germination of the fungus cladosporium cucumerinum, in direct bioautography, at a dose of 1 microgram. the new diterpenes also inhibited the growth of gram-positive bacteria, in the ... | 1996 | 8835454 |
| influence of a subinhibitory dose of antifungal fatty acids from sporothrix flocculosa on cellular lipid composition in fungi. | antifungal fatty acids produced by the biocontrol fungus sporothrix flocculosa were studied on the basis of their effect on growth and cellular lipid composition of three fungi, cladosporium cucumerinum, fusarium oxysporum, and s. flocculosa, whose growth was decreased by 51, 33, and 5%, respectively, when exposed to 0.4 mg fatty acid per ml. the sensitivity to fatty acid antibiotics from s. flocculosa was related to a high degree of unsaturation of phospholipid fatty acids and a low proportion ... | 1996 | 8898307 |
| acyl secoiridoids and antifungal constituents from gentiana macrophylla. | lc-uv-mass spectrometry and bioassay co-directed fractionation of an aqueous acetone extract of the roots of gentiana macrophylla gave three new chromene derivatives and two novel and six known secoiridoids, along with kurarinone, kushenol i, beta-sitosterol, stigmasterol, daucosterol, beta-sitosterol-3-o-gentiobioside, alpha-amyrin, oleanolic acid, isovitexin, gentiobiose and methyl 2-hydroxy-3-(1-beta-d-glucopyranosyl)oxybenzoate. the structures of the new products were established from spectr ... | 1996 | 9397205 |
| antifungal and antibacterial naphthoquinones from newbouldia laevis roots. | from a dichloromethane extract of newbouldia laevis roots, four new (6-hydroxydehydroiso-alpha-lapachone, 7-hydroxydehydroiso-alpha-lapachone, 5,7-dihydroxydehydroiso-alpha-lapachone and 3-hydroxy-5-methoxydehydroiso-alpha-lapachone) and six known naphthoquinones have been isolated. their structures were established by spectroscopic methods (uv, ei mass spectrometry, 1h and 13c nmr) and that of 7-hydroxydehydroiso-alpha-lapachone was confirmed by x-ray crystallography. all naphthoquinones showed ... | 1996 | 9397206 |
| antifungal alkaloids and limonoid derivatives from dictamnus dasycarpus. | from the root bark of dictamnus dasycarpus (rutaceae), four limonoid derivatives, two furoquinoline alkaloids, five limonoids, two sesquiterpenes and three steroids were isolated and their structures elucidated on the basis of various spectroscopic methods. among the identified compounds, one was determined to be a new natural product, 6 beta-hydroxyfraxinellone, while six compounds were found to be active against the plant pathogenic fungus cladosporium cucumerinum. the relationship between the ... | 1998 | 9429316 |
| four new bioactive polybrominated diphenyl ethers of the sponge dysidea herbacea from west sumatra, indonesia. | the marine sponge dysidea herbacea collected from indonesia yielded four new polybrominated diphenyl ether congeners 2-5 and the known derivatives 1, 6, and 7. the structures of the new compounds were unambiguously established on the basis of nmr spectroscopic (1h, 13c, cosy, 1h-detected direct and long-range 13c-1h correlations) and mass spectrometric (eims) data. all of the compounds were active against the gram-positive bacteria bacillus subtilis and the phytopathogenic fungus cladosporium cu ... | 1997 | 9463111 |
| antifungal and larvicidal meroterpenoid naphthoquinones and a naphthoxirene from the roots of cordia linnaei. | three new meroterpenoid naphthoquinones, the known cordiaquinone b and a new naphthoxirene have been isolated from the roots of cordia linnaei. their structures were established by spectrometric methods including ei, d/ci and fab mass spectrometry, 1h, 13c and 2d nmr experiments. the naphthoquinones showed activity against cladosporium cucumerinum, candida albicans and the larvae of the yellow fever-transmitting mosquito aedes aegypti, while the naphthoxirene derivative was found to be inactive ... | 1998 | 9542168 |
| four new bioactive lobane diterpenes of the soft coral lobophytum pauciflorum from mindoro, philippines. | the marine soft coral lobophytum pauciflorum collected from mindoro island, philippines, yielded four new lobane diterpene derivatives: the acetate congeners of epoxylobatrienol and lobatrienediol (2 and 7, respectively), a methoxyl congener of lobatetraene (10), and an oxepin congener of lobatrienetriol (11), and six known derivatives (1, 3-6, and 8). the structures of the new compounds were unambiguously established on the basis of nmr spectroscopic (1h, 13c, cosy, 1h-detected direct, and long ... | 1998 | 9548875 |
| use of on-flow lc/1h nmr for the study of an antioxidant fraction from orophea enneandra and isolation of a polyacetylene, lignans, and a tocopherol derivative. | the ch2cl2 extract of the leaves of orophea enneandra displayed antifungal, antioxidant, and radical scavenging properties in bioautographic tlc assays. to obtain rapid information on the active compounds, on-flow lc/1h nmr and lc/uv/ms analyses of the antioxidant fraction were performed. the on-line information led rapidly to the partial identification of three closely related lignans, one tocopherol derivative, and one polyacetylene. this approach necessitated, however, large quantities to be ... | 1998 | 9868150 |
| mono- and sesquiterpenes and antifungal constituents from artemisia species. | in addition to beta-sitosterol and alpha-amyrin detected in all the investigated species, the extract of the aerial parts of artemisia giraldii var. giraldii gave stigmasterol, daucosterol, sesamine, luteolin, eupafolin, hispidulin, eupatilin, belamcanidin, pinitol, artemin, ridentin, and a new antifungal monoterpene (named santolinylol) while that of the aerial parts of a. mongolica afforded sesamine, eupafolin, eupatilin, matricarin, and a new germacranolide (3-oxo-11 alpha h-germacra-1(10)e,4 ... | 1999 | 10083848 |
| comparison of local and systemic induction of acquired disease resistance in cucumber plants treated with benzothiadiazoles or salicylic acid. | the accumulation of chitinase and its involvement in systemic acquired disease resistance was analyzed using acibenzolar-s-methyl and salicylic acid (sa). resistance against scab (pathogen: cladosporium cucumerinum) and the accumulation of chitinase were rapidly induced in cucumber plants after treatment with acibenzolar-s-methyl. in contrast, sa protected the plants from c. cucumerinum and the accumulation of chitinase was induced only on the treated leaves. the accumulation of chitinase in res ... | 1999 | 10394634 |
| two 6-substituted 5,6-dihydro-alpha-pyrones from ravensara anisata. | the leaves and bark dichloromethane extracts of ravensara anisata showed antifungal activity against the yeast candida albicans and the phytopathogenic fungus cladosporium cucumerinum in bioautographic tlc assays. activity-guided fractionation afforded two new alpha-pyrones: 6r*-(4r*-acetoxy-2s*-hydroxy- 8-phenyloctyl)-5,6-dihydro-2-h-pyran-2-one and 6r*-(2s*-acetoxy-4r*- hydroxy-8-phenyloctyl)-5,6-dihydro-2-h-pyran-2-one. their structures have been established by nmr spectroscopy, chemical meth ... | 1999 | 10513401 |
| antifungal and larvicidal cordiaquinones from the roots of cordia curassavica. | in addition to the known cordiaquinones a and b, two novel meroterpenoid naphthoquinones, named cordiaquinones j and k, have been isolated from the roots of cordia curassavica. their structures were elucidated by spectrometric methods including ei, d/ci mass spectrometry, 1h, 13c and 2d-nmr experiments. the four naphthoquinones demonstrated antifungal activities against cladosporium cucumerinum, candida albicans and toxic properties against larvae of the yellow fever-transmitting mosquito aedes ... | 2000 | 10724189 |
| bioactive terpenes from the soft coral heteroxenia sp. from mindoro, philippines. | a marine soft coral species of the genus heteroxenia collected from mindoro island, philippines yielded two cadinene sesquiterpenes, (+)-alpha-muurolene (1) and a novel derivative (+)-6-hydroxy-alpha-muurolene (2), as well as the biologically active polyhydroxysterol, sarcoaldosterol a (3). the structure of the novel compound was unambiguously established on the basis of nmr spectroscopic (1h, 13c, cosy, 1h-detected direct and long range 13c-1h correlations) and mass spectrometric (eims) data. a ... | 2000 | 10739105 |
| antifungal and larvicidal compounds from the root bark of cordia alliodora. | two new natural products, a phenylpropanoid derivative characterized as 1-(3'-methoxypropanoyl)-2,4,5-trimethoxybenzene (1) and a prenylated hydroquinone, 2-(2z)-(3-hydroxy-3,7-dimethylocta-2, 6-dienyl)-1,4-benzenediol (2), have been isolated from the root bark of cordia alliodora. both compounds exhibited antifungal properties against the phytopathogenic mold cladosporium cucumerinum. the phenylpropanoid derivative (1), whose structure is closely related to beta-asarone, also demonstrated a mar ... | 2000 | 10757739 |
| biological characterization of fusapyrone and deoxyfusapyrone, two bioactive secondary metabolites of fusarium semitectum. | fusapyrone (1) and deoxyfusapyrone (2), two alpha-pyrones originally isolated from rice cultures of fusarium semitectum, were tested in several biological assays. compounds 1 and 2 showed considerable antifungal activity against several plant pathogenic and/or mycotoxigenic filamentous fungi, although they were inactive toward yeasts isolated from plants and the gram-positive bacterium bacillus megaterium in disk diffusion assays. compound 1 was consistently more active than 2. among the tested ... | 2000 | 10978211 |
| in vitro antifungal activity of schizozygia coffaeoides bail. (apocynaceae) extracts. | leaf extracts of schizozygia coffaeoides were investigated for antifungal activity using the disc diffusion assay technique. petroleum ether 40-60 degrees c, dichloromethane-ethyl acetate (1:1) and methanol extracts were fungitoxic to trichophyton mentagrophytes, microsporum gypseum, cladosporium cucumerinum and candida albicans. the extracts were fungistatic in action. | 2001 | 11137346 |
| pyrone and pyridone compounds in the liquid culture of physisporinus sanguinolentus. | chromatographic separation of the liquid culture filtrate of the basidiomycete fungus physisporinus sanguinolentus has yielded three new compounds viz., 2-methyl-4-pyrone, 2-methyl-5,6-dihydro-4-pyrone and the pyridone form of 4-hydroxy-2-methylpyridine, together with the known triacetic acid lactone, the sesquiterpene dialdehyde merulidial and a derivative of merulidial. their structures were elucidated by spectroscopic analysis and by comparison to literature data and a synthetic sample. one o ... | 2001 | 11314963 |
| identification of volatile constituents of tambourissa leptophylla. | the volatile fraction of tambourissa leptophylla fruit skin was extracted by petrol ether, purified by adsorption chromatography (lpc) and analysed by gas chromatographic-spectroscopic methods. 27 non-oxygenated terpene hydrocarbons and 10 oxygenated derivatives were identified. the most abundant components were: limonene (24.0%), cis-alpha-bergamotene (23.2%), delta-3-carene (8.2%), alpha-curcumene (6.0%), trans-alpha-bergamotene (5.1%), alpha-copaene (4.1%), alpha-pinene (4.0%), p-cymene (4.0% ... | 2001 | 11345708 |
| five new prenylated stilbenes from the root bark of lonchocarpus chiricanus. | besides the known compounds longistylines c (1), d (2), and 3,5-dimethoxystilbene (5), five new prenylated stilbenes, named chiricanines a--e (3, 4, 6--8), have been isolated from the root bark of lonchocarpus chiricanus. their structures were resolved on the basis of spectrometric methods including (1)h, (13)c, and 2d nmr experiments and mass spectrometry. compound 3 was the only prenylated stilbene to demonstrate antifungal effects against cladosporium cucumerinum. four of the isolated compoun ... | 2001 | 11421729 |
| screening of malian medicinal plants for antifungal, larvicidal, molluscicidal, antioxidant and radical scavenging activities. | a total of 78 different extracts from 20 medicinal plants belonging to 14 plant families from mali were tested for their antifungal, larvicidal, molluscicidal, antioxidant and radical scavenging activities. dichloromethane, methanol, water and ethanol extracts were used. tlc autobiography for antifungal activity was run with cladosporium cucumerinum and candida albicans. extracts were also tested on the larvae of the mosquitoes aedes aegypti, anopheles gambiae and culex quinquefasciatus. mollusc ... | 2001 | 11507731 |
| quinones from heliotropium ovalifolium. | two new benzoquinones, heliotropinones a and b, have been isolated from the aerial parts of heliotropium ovalifolium. their structures were elucidated by spectrometric methods including high resolution electrospray ionization (esi-hr), ei mass spectrometry, 1h, 13c and 2d nmr experiments. the two quinones demonstrated antifungal activities against cladosporium cucumerinum and candida albicans as well as antibacterial activity against bacillus subtilis. | 2001 | 11576613 |
| isolation from cussonia barteri of 1'-o-chlorogenoylchlorogenic acid and 1'-o-chlorogenoylneochlorogenic acid, a new type of quinic acid esters. | 1'-o-chlorogenoylchlorogenic acid and 1'-o-chlorogenoylneochlorogenic acid, a new type of quinic acid esters, have been isolated, in addition to six known quinic acid esters, rutin, and a mixture of saponins, from the methanol extract of cussonia barteri seemann (araliaceae) leaves collected in cameroon. structure determination was achieved by nmr, mass, ir, and uv spectroscopy. all compounds were tested for inhibitory activity on 5-lipoxygenase and cyclooxygenase-1, for antimicrobial activity a ... | 2001 | 11731915 |
| isolation and identification of n-mercapto-4-formylcarbostyril, an antibiotic produced by pseudomonas fluorescens. | pseudomonas fluorescens strain g308 isolated from barley leaves produces a novel antibiotic substance that was purified by preparative tlc and hplc and identified as n-mercapto-4-formylcarbostyril (cbs) by lc/dad, ir, lc-es(+)/ms, lc-es(-)/ms, gc-ei/ms, lc-hres(+)/ms, mass isotope ratios analysis, 1h nmr and 13c nmr analysis. the purified new antibiotic compound is effective against many phytopathogenic fungi in vitro. the compound inhibited at 25 ppm spore germination and germ tube growth of th ... | 2001 | 11738425 |
| antifungal steroidal glycosides from the patagonian starfish anasteriasminuta: structure-activity correlations. | two new sulfated steroidal hexaglycosides, anasterosides a (2) and b (3), along with the known versicoside a (1) have been isolated from the patagonian starfish anasterias minuta. their structures have been elucidated by spectroscopic analysis (nmr and fabms) and chemical transformations. compounds 1 and 2 and the synthetic pentaglycoside 1b derived from versicoside a showed antifungal activity against the plant pathogenic fungus cladosporium cucumerinum. desulfation of hexaglycoside 1 rendered ... | 2002 | 11858747 |
| flavonoids from ulex airensis and ulex europaeus ssp. europaeus. | from the dichloromethane extract of ulex airensis three new isoflavonoids, ulexin c (1), ulexin d (2), and 7-o-methylisolupalbigenin (3), were isolated and characterized by spectroscopic methods. ulexin d (2) was also identified from the dichloromethane extract of ulex europaeus ssp. europaeus. together with these new metabolites, 18 compounds of previously known structures were isolated and identified from both species. the antifungal activity of these compounds was tested against cladosporium ... | 2002 | 11858751 |
| three new prenylated isoflavonoids from the root bark of erythrina vogelii. | phytochemical investigation of the ch2cl2 extract of erythrina vogelii led to the isolation of five isoflavonoids. three prenylated isoflavonoids are new natural compounds. the isolation of the antifungal compounds was monitored by inhibition of the growth of cladosporium cucumerinum in a direct tlc bioautographic assay. the structures of these compounds were elucidated by spectroscopic techniques. | 2002 | 11859477 |
| cytotoxic and antifungal triterpene glycosides from the patagonian sea cucumber hemoiedema spectabilis. | two new sulfated triterpene glycosides, hemoiedemosides a (1) and b (2), have been isolated from the patagonian sea cucumber hemoiedema spectabilis. their structures have been established by a combination of spectroscopic analysis (nmr and fabms) and chemical transformations. both glycosides present the same aglycon and differ in the degree of sulfation of the tetrasaccharide chain. hemoiedemoside b (2) is a new example of a small number of trisulfated triterpene glycosides from sea cucumbers be ... | 2002 | 12088428 |
| evaluation of the antimicrobial potential of medicinal plants from the ivory coast. | a total of 148 crude ethanol extracts from 115 plant species were tested in vitro against gram-negative strains (escherichia coli, pseudomonas aeruginosa) and the gram-positive staphylococcus aureus and enterococcus faecalis. moreover, they were submitted to antifungal assays against candida albicans and cladosporium cucumerinum, a human and a plant pathogenic microorganism, respectively, known to be good indicators of antifungal activity. no activity was detected against the gram-negative bacte ... | 2002 | 12203276 |
| a new prenylisoflavone from ulex jussiaei. | a new naturally occurring isoflavone, derrone, was isolated from ulex jussiaei (leguminosae) together with the isoflavones ulexins a-c, lupalbigenin, isolupalbigenin, 7-o-methylso-lupalbigenin, isoderrone, ulexone a and isochandalone, the pterocarpans (6ar,11ar)-(-)-maackiain, (6ar,11ar)-(-)-2-methoxymaackiain and (6ar,11ar)-(-)-4-methoxymaackiain, the chalcone 4-hydroxylonchocarpine and the dihydrochalcone crotaramosmine. the antifungal activity of the new compound was tested by a bioautographi ... | 2002 | 12240984 |
| on-line identification of the antifungal constituents of erythrina vogelii by liquid chromatography with tandem mass spectrometry, ultraviolet absorbance detection and nuclear magnetic resonance spectrometry combined with liquid chromatographic micro-fractionation. | in our continuing search for new antifungal agents of plant origin, the investigation of erythrina vogelii hook. f. (leguminosae), a plant used in the traditional medicine of ivory coast to treat various infectious ailments, was undertaken. in order to rapidly identify the active principles, the crude extract was analysed by low-flow lc-1h nuclear magnetic resonance spectrometry (nmr) which gave a sensitive detection of all the main peaks. lc microfractionation was performed just after lc-nmr de ... | 2002 | 12458932 |
| antifungal, antioxidant and larvicidal activities of compounds isolated from the heartwood of mansonia gagei. | eleven compounds isolated from the heartwood of mansonia gagei were tested for their antifungal activities against cladosporium cucumerinum and candida albicans, as well as for their larvicidal activities against aedes aegypti and radical scavenging properties in a dpph assay. mansonone c (4) was found to be the most interesting compound with antifungal activities against cladosporium cucumerinum and candida albicans as well as for its larvicidal properties against aedes aegypti. mansonone e (5) ... | 2003 | 12601687 |
| guieranone a, a naphthyl butenone from the leaves of guiera senegalensis with antifungal activity. | a new methoxylated naphthyl butenone, guieranone a (1), was isolated from the leaves of guiera senegalensis. its structure was elucidated as (2e)-1-(1,3,6,8-tetramethoxy-2-naphthyl)but-2-en-1-one, on the basis of spectroscopic data. also isolated were two known naphthopyrones, 5-methyldihydroflavasperone (2) and 5-methylflavasperone (3). guieranone (1) exhibited potent antifungal activity against cladosporium cucumerinum and is the first naphthyl ketone derivative to have been isolated from the ... | 2003 | 12662113 |
| a sulfonic anhydride derivative from dibenzyl trisulphide with agro-chemical activities. | in the present study, the biologically active natural product dibenzyl trisulphide (dts) which was previously isolated from the sub-tropical shrub petiveria alliacea was transformed to methyl benzyl sulphonic anhydride (mbsa) using a "one pot" transformation method. the anhydride was evaluated for anti-microbial activities on the bacteria, bacillus subtilis and pseudomonas fluorescens and found to be 2.5 fold more effective than the commercial agents isoniazid and ampicillin in inhibiting the gr ... | 2003 | 12668029 |
| photoactive extracts from thevetia peruviana with antifungal properties against cladosporium cucumerinum. | seeds of thevetia peruviana were screened for their antifungal photoactivity. extracts obtained either with n-hexane or dichloromethane were fractionated by column chromatography and further analysed by thin-layer chromatography. all seed extracts and fractions were tested for inhibition of the fungus cladosporium cucumerinum for the evaluation of photoactive inhibitory effects. antifungal light-dependent activity was observed for some of the fractions and both crude extracts. the most photoacti ... | 2003 | 12745247 |
| antifungal methylphenone derivatives and 5-methylcoumarins from mutisia friesiana. | in addition to the known mutisicoumarin a, the aerial parts of the shrub mutisia friesiana afforded five new methylphenones, two new 5-methylcoumarins and a new related chromone. their structures were elucidated by spectroscopic methods 13c nmr data for mutisicoumarin a are reported for the first time. mutisiphenones a and b and mutisicoumarin a showed antifungal activity against the phytopathogenic fungus cladosporium cucumerinum. | 2003 | 12939040 |
| antifungal isopimaranes from hypoestes serpens. | five isopimarane diterpenes (7beta-hydroxyisopimara-8,15-dien-14-one, 14alpha-hydroxyisopimara-7,15-dien-1-one, 1beta,14alpha-dihydroxyisopimara-7,15-diene, 7beta-hydroxyisopimara-8(14),15-dien-1-one and 7beta-acetoxyisopimara-8(14),15-dien-1-one) have been isolated from the leaves of hypoestes serpens (acanthaceae). all compounds exhibited antifungal activity against both the plant pathogenic fungus cladosporium cucumerinum and the yeast candida albicans; two of them also displayed an acetylcho ... | 2003 | 12943772 |
| isolation and anti-oomycete activity of nyasol from anemarrhena asphodeloides rhizomes. | the methanol extract of anemarrhena asphodeloides rhizomes exhibited strong antifungal activity against the plant pathogenic fungi magnaphothe grisea, rhizoctonia solani, and the plant pathogenic oomycete phytophthora capsici. the antifungal substance isolated from the rhizomes of a. asphodeloides was identified to be nyasol, (z)-1,3-bis(4-hydroxyphenyl)-1,4-pentadiene by nmr and mass spectral analysis. nyasol effectively inhibited the mycelial growth of colletotrichum orbiculare, p. capsici, py ... | 2003 | 14561517 |
| biological activities of an extract from cleome viscosa l. (capparaceae). | electron micrograph examination of the leaf and stem surfaces of cleome viscosa l (family capparaceae) revealed the presence of secretory glandular trichomes with club-cylinder and cylinder morphologies. in the present study, the leaves and stems of c. viscosa were extracted with hexane and the extract was evaluated for the following biological activities: anti-bacterial, anti-fungal, contact insecticidal and nematicidal. the extract was found to be a potent anti-bacterial agent according to the ... | 2003 | 14564407 |
| heliotropamide, a novel oxopyrrolidine-3-carboxamide from heliotropium ovalifolium. | heliotropamide (1), a new alkaloid with a novel oxopyrrolidine-3-carboxamide central moiety, has been isolated as the major product of the dicholoromethane extract of heliotropium ovalifolium aerial parts. its structure was elucidated by spectrometric methods including esi-hr, ei, d/ci mass spectrometry, (1)h, (13)c, and 2d nmr experiments, and chemical derivatization. neither heliotropamide nor its acetylated derivative (1a) showed any antifungal activity against cladosporium cucumerinum and ca ... | 2003 | 14695794 |
| antifungal activity of beta-asarone from rhizomes of acorus gramineus. | an antifungal substance was isolated from the extract of acorus gramineus using various chromatographic procedures. the antibiotic was identified as beta-asarone, cis-2,4,5-trimethoxy-1-propenylbenzene, on the basis of the high-resolution ei-mass, nmr, and uv spectral data. beta-asarone completely inhibited mycelial growth of some plant pathogenic fungi, cladosporium cucumerinum,colletotrichum orbiculare, magnaporthe grisea, and pythium ultimum, in a range of 0.5-30 microg/ml. the growth of baci ... | 2004 | 14969530 |
| antileishmanial and antifungal acridone derivatives from the roots of thamnosma rhodesica. | eight furanocoumarins, one coumarin and four acridone derivatives have been identified in the roots of thamnosma rhodesica (rutaceae). rhodesiacridone, one of these acridone derivatives, is reported here for the first time. its structure was elucidated by spectrometric methods including esi-hr, ei, dci mass spectrometry, 1h, 13c and 2d nmr experiments. this novel compound showed activities against the intracellular form of a human pathogen, the protozoan parasite leishmania major. two known acri ... | 2004 | 15081302 |
| 5-methylcoumaranones from mutisia friesiana and their bioactivity. | in addition to the known mutisicoumaranones a (1) and b (2), the methanolic extract of the aerial parts of the shrub mutisia friesiana afforded two new 5-methylcoumaranones, mutisicoumaranones c (3) and d (4). their structures were elucidated by spectroscopic methods. (13)c nmr data for mutisicoumaranones a and b are reported for the first time. all compounds showed antifungal activity against the phytopathogenic fungus cladosporium cucumerinum and bactericidal activity against staphylococcus au ... | 2004 | 15165137 |
| antifungal activity of bacillus subtilis 355 against wood-surface contaminant fungi. | a strain of bacillus subtilis was examined for antifungal activity against phytopathogenic and wood-surface contaminant fungi. the bacterium was grown in five culture media with different incubation times in order to study cell development, sporulation, and the production of metabolites with antifungal activity. the anti-sapstain and anti-mould activity of the bacterium grown in yeast extract glucose broth (ygb) medium in wood was also evaluated. in ygb, the bacterium inhibited the growth of sev ... | 2004 | 15197600 |
| bioactivity guided isolation of antifungal compounds from the liverwort bazzania trilobata (l.) s.f. gray. | a dichloromethane and a methanol extract of the liverwort bazzania trilobata showed antifungal activity against the phytopathogenic fungi botrytis cinerea, cladosporium cucumerinum, phythophthora infestans, pyricularia oryzae and septoria tritici. bioautography on thin-layer chromatograms was used to isolate six antifungal sesquiterpenes: 5- and 7-hydroxycalamenene, drimenol, drimenal, viridiflorol, gymnomitrol and three bisbibenzyls: 6 ',8'-dichloroisoplagiochin c, isoplagiochin d and 6'-chloro ... | 2004 | 15451321 |
| isolation and antifungal activity of kakuol, a propiophenone derivative from asarum sieboldii rhizome. | an antifungal substance active against colletotrichum orbiculare (berk & mont) arx was isolated from the methanol extracts of asarum sieboldii (miq) maek rhizomes. high-resolution ms, nmr and uv spectral data confirmed that the antifungal substance is kakuol, 2-hydroxy-4,5-methylenedioxypropiophenone. colletotrichum orbiculare was most sensitive to kakuol, with mic of 10 microg ml(-1). kakuol also completely inhibited the mycelial growth of botrytis cinerea pers ex fr and cladosporium cucumerinu ... | 2005 | 15846774 |
| bioactivity guided isolation of antimicrobial compounds from lythrum salicaria. | lythrum salicaria extracts showed activity against the phytopathogenic fungus cladosporium cucumerinum and activity against the bacteria staphylococcus aureus, proteus mirabilis and microccocus luteus. bioautography on thin-layer chromatograms was used to isolate the two antifungal triterpenoids oleanolic and ursolic acid. the hexahydroxydiphenoyl ester vescalagin was isolated as active principle of the antibacterial activity. furthermore, the flavon-c-glucosides vitexin, isovitexin, orientin an ... | 2005 | 15975734 |
| on-line identification of the bioactive compounds from blumea gariepina by hplc-uv-ms and hplc-uv-nmr, combined with hplc-micro-fractionation. | the dichloromethane extract of the aerial parts of blumea gariepina (asteraceae) was shown to be active against the phytopathogenic fungus cladosporium cucumerinum and to inhibit acetylcholinesterase. in order rapidly to identify the active principles, the crude extract was analysed by on-flow hplc-1h-nmr. hplc-micro-fractionation was performed and all peaks collected were submitted to assays against c. cucumerinum and acetylcholinesterase. by this means, the biological activities could be effic ... | 2005 | 15997849 |
| stress stimulus induced resistance to cladosporium cucumerinum in cucumber seeding. | up to date, the studies of plant induced resistance have become the focus in plant pathology and physiology. during the course of pathogens penetrating the plant cell, besides of chemical secretion, the pathogens may generate mechanical signal caused by the physical pressure on the plant cell. in the non-host resistance, both the chemical signal and the mechanical stress signal are considered to have contribution to the entire defense reaction acted by the plant. the penetration of pathogen clad ... | 2005 | 16002268 |
| minutosides a and b, antifungal sulfated steroid xylosides from the patagonian starfish anasterias minuta. | two new sulfated polyhydroxylated steroidal xylosides, minutosides a (1) and b (2), together with the known pycnopodioside b (3), have been isolated from the brine shrimp active fraction of the ethanolic extract of the starfish anasterias minuta. the structures have been elucidated by extensive 1d and 2d nmr as well as fabms analysis and chemical methods. compound 2 is the first example of a polyhydroxylated steroidal xyloside containing an amide function in the aglycon side chain. the three xyl ... | 2005 | 16124779 |
| isolation and antifungal and antioomycete activities of staurosporine from streptomyces roseoflavus strain ls-a24. | the actinomycete strain ls-a24 active against some plant fungal and oomycete pathogens was isolated from a soil sample of the sunghwan lake in korea. the cell wall composition and spore shape of strain ls-a24 were ll-diaminopimelic acid and spiral type, respectively. on the basis of the physiological and biochemical characteristics and 16s ribosomal dna sequence analysis, strain ls-a24 was identical to streptomyces roseoflavus. an antifungal and antioomycete antibiotic was isolated from ls-a24 u ... | 2006 | 16608228 |
| diterpene biosynthesis in maize seedlings in response to fungal infection. | a cell-free system which catalyzes the biosynthesis of terpene hydrocarbons when supplemented with mevalonate, mn(2+), and atp was prepared from the scutellum-embryonic axis region of maize seedlings. the capacity of this system for the production of terpene hydrocarbons was enhanced 50- to 100-fold when the seedlings were exposed for 48 hours to the fungus rhizopus stolonifer prior to tissue homogenization. the fungi aspergillus niger, fusarium moniliforme, and verticillium albo-atrum also elic ... | 1979 | 16660976 |
| host-pathogen interactions : xviii. isolation and biological activity of glycinol, a pterocarpan phytoalexin synthesized by soybeans. | a previously unrecognized phytoalexin has been isolated from soybean cotyledons that had been infected with bacteria or exposed to ultraviolet light. the phytoalexin has been purified to homogeneity by silica gel flash chromatography and high pressure liquid chromatography. it has been structurally characterized by its ultraviolet, circular dichroism and nuclear magnetic resonance spectra, polarimetry, and its mass spectrometric fragmentation pattern. the phytoalexin, (6as,11as)-3,6a,9-trihydrox ... | 1981 | 16661917 |
| conversion of helminthosporium sacchari toxin to toxoids by beta-galactofuranosidase from helminthosporium. | helminthosporium sacchari produces a host-selective toxin and structurally related nontoxic compounds, here referred to as ;toxoids.' toxin and the three toxoids were each isolated to a high level of purity and were hydrolyzed under acidic conditions. the released galactose was measured by a galactose oxidase/peroxidase assay. toxin was found to contain four units of galactose per molecule, as previously reported. toxoids i, ii, and iii contained one, two, and three units of galactose, respectiv ... | 1983 | 16663037 |
| bioactive diterpenes from the fruits of detarium microcarpum. | a fruit pulp extract of detarium microcarpum showed inhibition of the growth of the plant pathogenic fungus cladosporium cucumerinum and of the enzyme acetylcholinesterase, implicated in alzheimer's disease. fractionation of this extract led to the isolation of four new clerodane diterpenes, 3,4-epoxyclerodan-13e-en-15-oic acid (1), 5alpha,8alpha(2-oxokolavenic acid) (2), 3,4-dihydroxyclerodan-13e-en-15-oic acid (4), and 3,4-dihydroxyclerodan-13z-en-15-oic acid (5). also isolated were 2-oxokolav ... | 2006 | 16724838 |
| screening for anti-infective properties of several medicinal plants of the mauritians flora. | several plants of the mauritian flora alleged to possess anti-infective properties were studied against different strains of pathogenic bacteria and fungi. the grounded dried plant materials were extracted with different extractants and screened for anti-microbial activity using the disk diffusion and the micro-dilution techniques. preliminary screening revealed that the methanol extracts were most active. salmonella enteritidis, enterobacter cloacae and bacillus subtilis were the three test org ... | 2007 | 17011733 |
| bioassay guided isolation of a new c18-polyacetylene, (+)-9(z),17-octadecadiene-12,14-diyne-1,11,16-triol, from cassonia barteri. | a novel c18-polyacetylene, (+)-9( z),17-octadecadiene-12,14-diyne-1,11,16-triol, has been isolated from the ethyl acetate extract of cassonia barteri (araliaceae) leaves collected in cameroon. the structure determination was achieved by nmr, mass, ir, and uv spectroscopy. the new polyenyne shows antibacterial activity against bacillus subtilis and pseudomonas fluorescens, antifungal activity against cladosporium cucumerinum, moiluscicidal activity against biomphalaria glabrata at low concentrati ... | 1998 | 17253268 |
| antifungal activity of salaceyin a against colletotrichum orbiculare and phytophthora capsici. | the antifungal activities of novel salicylic acid derivatives, salaceyin a, 6-(9-methyldecyl) salicylic acid, and salaceyin b, 6-(9-methylundecyl) salicylic acid were evaluated against plant pathogenic fungi. salaceyin a showed antifungal activity against cladosporium cucumerinum, colletotrichum orbiculare and phytophthora capsici at 64 microg ml(-1) while salaceyin b was less effective. in vitro antifungal activities of the compounds were influenced by the experimental ph value of the mic test ... | 2007 | 17647212 |
| biological evaluation of neopeptins isolated from a streptomyces strain. | microbial secondary metabolites are a rich source of antifungal agents and have merit as alternatives to synthetic fungicides. to develop disease control agents against powdery mildew, the lipopeptide antibiotic neopeptins were identified from the culture broth of a streptomyces sp., and in vivo control efficacy of the compounds was evaluated on cucumber plants under glasshouse conditions. | 2007 | 17912683 |
| 1-o-substituted derivatives of murrayafoline a and their antifungal properties. | the synthesis of some 1-oxygenated derivatives of murrayafoline a (1) and their antifungal properties is reported. three derivatives, 1-hydroxy-3-methyl-9h-carbazole (2), 1-(3-methylbut-2-enyloxy)-3-methyl-9h-carbazole (3) and 1-(2,3,4,6,-tetra-o-acetyl-alpha-d-o-glucopyranosyl)-3-methyl-9h-carbazole (4), of murrayafoline a were synthesized. compounds 1 and 2 exhibit strong fungicidal activity against cladosporium cucumerinum at the dose of 12.5 microg. | 2008 | 18629709 |
| 1-o-substituted derivatives of murrayafoline a and their antifungal properties. | the synthesis of some 1-oxygenated derivatives of murrayafoline a (1) and their antifungal properties is reported. three derivatives, 1-hydroxy-3-methyl-9h-carbazole (2), 1-(3-methylbut-2-enyloxy)-3-methyl-9h-carbazole (3) and 1-(2,3,4,6-tetra-o-acetyl-alpha-d-o-glucopyranosyl)-3-methyl-9h-carbazole (4) of murrayafoline a were synthesized. compounds 1 and 2 exhibited strong fungicidal activity against cladosporium cucumerinum at the dose of 12.5 microg. | 2008 | 19023805 |
| [cucumber diseases diagnosis using multispectral imaging technique]. | for a reliable diagnosis of plant diseases and insect pests, spectroscopy analysis technique and mutispectral imaging technique are proposed to diagnose five cucumber diseases, namely trichothecium roseum, sphaerotheca fuliginea, cladosporium cucumerinum, corynespora cassiicola and pseudoperonospora cubensis. in the experiment, the cucumbers' multispectral images of 14 visible lights channels, near infrared channel and panchromatic channel were captured using narrow-band multispectral imaging sy ... | 2009 | 19445229 |
| antioomycete activity of gamma-oxocrotonate fatty acids against p. infestans. | infections with phytophthora infestans, the causal agent of potato and tomato late blight disease, are difficult to control and can lead to considerable agricultural losses. thus, the development of new effective agents against the pathogen is of great interest. in previous work, (e)-4-oxohexadec-2-enoic acid (3) was isolated from hygrophorus eburneus, which exhibited fungicidal activity against cladosporium cucumerinum. here, the inhibitory effect of 3 on p. infestans spore germination and myce ... | 2009 | 19778058 |
| [horticultural plant diseases multispectral classification using combined classified methods]. | the research on multispectral data disposal is getting more and more attention with the development of multispectral technique, capturing data ability and application of multispectral technique in agriculture practice. in the present paper, a cultivated plant cucumber' familiar disease (trichothecium roseum, sphaerotheca fuliginea, cladosporium cucumerinum, corynespora cassiicola, pseudoperonospora cubensis) is the research objects. the cucumber leaves multispectral images of 14 visible light ch ... | 2010 | 20384138 |
| synthesis and antifungal activity of 2-hydroxy-4,5-methylenedioxyaryl ketones as analogues of kakuol. | in a study aiming to determine the structural elements essential to the antifungal activity of kakuol, we synthesized a series of 2-hydroxy-4,5-methylenedioxyaryl ketones, and we assayed their in vitro antifungal activity. the most sensitive target organisms to the action of these class of compounds were phytophthora infestans, phytium ultimum, cercospora beticola, cladosporium cucumerinum, and rhizoctonia solani. most of the analogs showed a remarkable in vitro activity, and some of them appear ... | 2010 | 20397224 |
| isolation and identification of 5-hydroxyl-5-methyl-2-hexenoic acid from actinoplanes sp. hbdn08 with antifungal activity. | a bioactivity-guided approach was employed to isolate and determine the chemical identity of bioactive constituents with antifungal activity from actinoplanes sp. hbdn08. the structure of the antifungal metabolite was elucidated as 5-hydroxyl-5-methyl-2-hexenoic acid on the basis of spectral analysis. this compound showed strong in vitro antifungal activity against botrytis cinerea, cladosporium cucumerinum and corynespora cassiicola, with an ic(50) of 32.45, 27.17, and 30.66 mg/l, respectively; ... | 2010 | 20584599 |
| ampullosine, a new isoquinoline alkaloid from sepedonium ampullosporum (ascomycetes). | a new isoquinoline alkaloid, ampullosine (3-methyl-isoquinoline-6-carboxylic acid, 1), was isolated from sepedonium ampullosporum and characterized by spectroscopic analysis and chemical reactions. this compound is responsible for the deep yellow color of the culture fluid of this species. moreover, the known compounds sepedonin (2) and anhydrosepedonin (3) were detected. twelve strains belonging to eight species of sepedonium have been screened for these three metabolites by lc/esi-srm (selecte ... | 2010 | 20614812 |
| synthesis, characterization, and antifungal activity of novel quaternary chitosan derivatives. | three novel quaternary chitosan derivatives were successfully synthesized by reaction of chloracetyl chitosan (cacs) with pyridine (pacs), 4-(5-chloro-2-hydroxybenzylideneamino)-pyridine (chpacs), and 4-(5-bromo-2-hydroxybenzylideneamino)-pyridine (bhpacs). the chemical structure of the prepared chitosan derivatives was confirmed by fourier transform infrared (ft-ir) and (13)c nuclear magnetic resonance ((13)c nmr) and their antifungal activity against cladosporium cucumerinum, monilinia fructic ... | 2010 | 20615498 |
| fine genetic mapping localizes cucumber scab resistance gene ccu into an r gene cluster. | scab, caused by cladosporium cucumerinum, is an important disease of cucumber, cucumis sativus. in this study, we conducted fine genetic mapping of the single dominant scab resistance gene, ccu, with 148 f(9) recombinant inbred lines (rils) and 1,944 f(2) plants derived from the resistant cucumber inbred line 9110gt and the susceptible line 9930, whose draft genome sequence is now available. a framework linkage map was first constructed with simple sequence repeat markers placing ccu into the te ... | 2010 | 21104067 |
| production of a newly isolated paenibacillus polymyxa biocontrol agent using monosodium glutamate wastewater and potato wastewater. | a phyllosphere bacterial strain ebl-06 was isolated from wheat leaves. the morphology, cultural characteristics, phospholipid fatty acids, physiological and antagonistic fungus activities of this strain were investigated. a phylogenetic tree was constructed by comparing with the published 16s rdna sequences of the relevant bacteria. the results showed that the isolate ebl-06 was a strain of paenibacillus polymyxa; this strain performed a high level of antagonistic fungus activity toward a broad ... | 2010 | 21174972 |
| anti-inflammatory, antioxidant and antifungal activity of chuquiraga spinosa. | context: stem and leaves infusion of chuquiraga spinosa (r&p) don. (asteraceae) is used in the peruvian traditional medicine for its anti-inflammatory properties and for the treatment of vaginal infections. objective: this study evaluated the antioxidant, anti-inflammatory and antifungal activities of c. spinosa for the first time. materials and methods: extracts of methanol, 50% methanol and water were obtained from c. spinosa aerial parts. antioxidant activity of the extracts was evaluated (dp ... | 2011 | 21554005 |
| isolation of a new natural product and cytotoxic and antimicrobial activities of extracts from fungi of indonesian marine habitats. | in the search for bioactive compounds, 11 fungal strains were isolated from indonesian marine habitats. ethyl acetate extracts of their culture broth were tested for cytotoxic activity against a urinary bladder carcinoma cell line and for antifungal and antibacterial activities against fish and human pathogenic bacteria as well as against plant and human pathogenic fungi. the crude extract of a sterile algicolous fungus (kt31), isolated from the red seaweed kappaphycus alvarezii (doty) doty ex p ... | 2011 | 21556160 |
| design, synthesis, biological activities, and 3d-qsar of new n,n'-diacylhydrazines containing 2-(2,4-dichlorophenoxy)propane moiety. | a series of new n,n'-diacylhydrazine derivatives were synthesized efficiently under microwave irradiation. their structures were characterized by (1) h nmr, ms, and elemental analysis. various biological activities of these compounds were tested. most of them exhibited higher herbicidal activities against dicotyledonous weeds than monocotyledonous weeds. in addition, favorable in vivo fungicidal activities were also found of these compounds against cladosporium cucumerinum, corynespora cassiicol ... | 2011 | 21816005 |
| antifungal activity and isomerization of octadecyl p-coumarates from ipomoea carnea subsp. fistulosa. | bioassay monitored hplc assisted isolation and purification of the chief antifungal fraction of the leaves of ipomoea carnea subsp. fistulosa (convulvulaceae) were achieved using colletotrichum gloeosporioides and cladosporium cucumerinum as test organisms. the activity of the purified fraction was further confirmed by the dose dependent inhibition of the spore germination of alternaria alternata and a. porri. the active fraction was identified as a mixture of (e)-octadecyl p-coumarate and (z)-o ... | 2011 | 22312731 |
| antimicrobial action of an endophytic fungi from sophor flavescens and structure identification of its active constituent. | endophytic fungus bs002 was isolated and characterized from sophora flavescens by plate method, which has broad antimicrobial activity. isolation and trace of a new bioactive compound from the fungus' culture extracts with the method of column chromatography and tlc biological autoradiography was conducted. finally, it was identified as 6,7-(2'e) dibutenyl-5,8-dihydroxy-(z)-cyclooct-2-ene-1,4-dione by nuclear magnetic resonance, infrared and liquid chromatography-mass spectrometry. the compound ... | 2014 | 26019517 |
| biocontrol and plant growth promotion characterization of bacillus species isolated from calendula officinalis rhizosphere. | the phenotypic and genotypic diversity of the plant growth promoting bacillus genus have been widely investigated in the rhizosphere of various agricultural crops. however, to our knowledge this is the first report on the bacillus species isolated from the rhizosphere of calendula officinalis. 15 % of the isolated bacteria were screened for their important antifungal activity against fusarium oxysporum, botrytis cinerea, aspergillus niger, cladosporium cucumerinium and alternaria alternata. the ... | 2013 | 24426149 |
| bipolamides a and b, triene amides isolated from the endophytic fungus bipolaris sp. mu34. | as a result of the continued screening for new metabolites produced by endophytic fungi from thai medicinal plants, two new triene fatty acid amides, bipolamides a (1) and b (2), were discovered from the endophytic fungus bipolaris sp. mu34. the structures of all of the isolated compounds were elucidated on the basis of the spectroscopic data of nmr and ms. an antimicrobial assay revealed that bipolamide b (2) had moderate antifungal activity against cladosporium cladosporioides ferms-9, cladosp ... | 2014 | 24192556 |
| chemical composition and biological activity of essential oil from pulicaria undulata from yemen. | the chemical composition of the essential oil obtained from the leaves of pulicaria undulata gamal ed din (syn p. orientalis sensu schwartz and p. jaubertii gamal ed din) was analyzed by gc-ms. major compounds of p. undulata oil were the oxygenated monoterpenenes, carvotanacetone (91.4%) and 2,5-dimethoxy-p-cymene (2.6.%). the antimicrobial activity of the essential oil was evaluated against six microorganisms, escherichia coli pseudomonas aeruginosa, staphylococcus aureus, methicillin-resistant ... | 2012 | 22474974 |
| sulfated steroid-amino acid conjugates from the irish marine sponge polymastia boletiformis. | antifungal bioactivity-guided fractionation of the organic extract of the sponge polymastia boletiformis, collected from the west coast of ireland, led to the isolation of two new sulfated steroid-amino acid conjugates (1 and 2). extensive 1d and 2d nmr analyses in combination with quantum mechanical calculations of the electronic circular dichroism (ecd) spectra, optical rotation, and 13c chemical shifts were used to establish the chemical structures of 1 and 2. both compounds exhibited moderat ... | 2015 | 25812034 |
| penarines a-f, (nor-)sesquiterpene carboxylic acids from hygrophorus penarius (basidiomycetes). | five sesquiterpene carboxylic acids (1-5) and one nor-sesquiterpene carboxylic acid (6) of the very rare ventricosane type, named penarines a-f, were isolated from fruiting bodies of the basidiomycete hygrophorus penarius (hygrophoraceae). this is the first report of (nor)-sesquiterpenes isolated from basidiocarps of the family hygrophoraceae. their structures were elucidated on the basis of extensive 1d ((1)h, (13)c) and 2d (hsqc, hmbc, cosy, roesy) nmr spectroscopic analyses as well as high-re ... | 2014 | 25269661 |
| design, synthesis, antifungal activities and 3d-qsar of new n,n'-diacylhydrazines containing 2,4-dichlorophenoxy moiety. | a series of new n,n'-diacylhydrazine derivatives were designed and synthesized. their structures were verified by 1h-nmr, mass spectra (ms) and elemental analysis. the antifungal activities of these n,n'-diacylhydrazines were evaluated. the bioassay results showed that most of these n,n'-diacylhydrazines showed excellent antifungal activities against cladosporium cucumerinum, corynespora cassiicola, sclerotinia sclerotiorum, erysiphe cichoracearum, and colletotrichum orbiculare in vivo. the half ... | 2013 | 24189221 |
| genomic sequence-based discovery of novel angucyclinone antibiotics from marine streptomyces sp. w007. | a large number of novel bioactive compounds were discovered from microbial secondary metabolites based on the traditional bioactivity screenings. recent fermentation studies indicated that the crude extract of marine streptomyces sp. w007 possessed great potential in agricultural fungal disease control against phomopsis asparagi, polystigma deformans, cladosporium cucumerinum, monilinia fructicola, and colletotrichum lagenarium. to further evaluate the biosynthetic potential of secondary metabol ... | 2012 | 22536997 |