scholarly journals Zinc(II) complexes of 3,10-C-meso-2,5,5,7,9,12,12,14- octamethyl-1,8-diaza-4,11-diazoniacyclotetradecane as its bis(acetate) trihydrate, [LBH2][CH3COO]2.3H2O: Synthesis, Characterization and antimicrobial studies

2018 ◽  
Vol 14 (24) ◽  
pp. 330
Author(s):  
Foni B. Biswas ◽  
Saswata Rabi ◽  
Kanak Barua ◽  
Tapashi G. Roy ◽  
Debashis Palit ◽  
...  
Keyword(s):  
Antibacterial Activities ◽  
Phytopathogenic Fungi ◽  
Substitution Reactions ◽  
Acetate Complex ◽  
Antimicrobial Studies ◽  
Acetate Trihydrate ◽  
Chiral Carbon ◽  
Phytopathogenic Fungi And Bacteria ◽  
Perchlorate Complex ◽  
Anion Exchange Reaction

One isomeric ligand, LB among three isomers (LA, LB and LC) of 2,9- C-meso-2,5,5,7,9,12,12,14-octamethyl-1,4,8,11-tetraazacyclotetradecanes, differing in the orientation of methyl groups on the chiral carbon atoms) on interaction with vinyl acetate produces 2,9-C-meso-2,5,5,7,9,12,12,14- octamethyl-1,8-diaza-4,11-diazoniacyclotetradecane as its bis(acetate) trihydrate, [LBH2][OOCCH3]2.3H2O. This ligand salt trihydrate reacts with Zn(CH3COO)2.2H2O to produce square pyramidal monoacetatozinc(II) acetate complex [ZnLB(CH3COO)](CH3COO), which undergoes anion exchange reaction with NaClO4.6H2O to produce monoacetatozinc(II) perchlorate complex, [ZnLB(CH3COO)](ClO4). The complex, [ZnLB(CH3COO)](ClO4) undergoes axial substitution reactions with KSCN, NaNO2 and KNO3 to form the substitution products, [ZnLB(NCS)](NCS), [ZnLB(NO2)](ClO4) and [ZnLB(NO3)](ClO4) respectively where CH3COOis replaced by NCS- , NO3 - and NO2 - . All these complexes have been characterized on the basis of analytical, spectroscopic, conductometric and magnetochemical data. The antifungal and antibacterial activities of these compounds have been studied against some phytopathogenic fungi and bacteria.

Bactericidal and Fungicidal Activities of Calia secundiflora (Ort.) Yakovlev

2008 ◽  
Vol 63 (9-10) ◽  
pp. 653-657 ◽  
Author(s):  
Dolores Pérez-Laínez ◽  
Rosario García-Mateos ◽  
Ruben San Miguel-Chávez ◽  
Marcos Soto-Hernández ◽  
Enrique Rodríguez-Pérez ◽  
...  
Keyword(s):  
Xanthomonas Campestris ◽  
Alternaria Solani ◽  
Erwinia Carotovora ◽  
Phytopathogenic Fungi ◽  
Quinolizidine Alkaloids ◽  
Liquid Chromatography Mass Spectrometry ◽  
In Vitro Bioassay ◽  
Organic Extract ◽  
Phytopathogenic Fungi And Bacteria

Calia secundiflora (Ortega) Yakovlev (Fabaceae) is considered a medicinal plant in Mexico but has scarcely been used because of the toxicity of its quinolizidine alkaloids. Several quinolizidine alkaloids have shown bactericidal, nematicidal, and fungicidal activities. The purpose of this study was to identify the alkaloids in the seeds and evaluate the activity of the organic extract on several phytopathogenic fungi and bacteria. An in vitro bioassay was conducted with species of the following phytopathogenic fungi: Alternaria solani, Fusarium oxysporum and Monilia fructicola; and of the following bacteria Pseudomonas sp., Xanthomonas campestris and Erwinia carotovora. Cytisine, lupinine, anagyrine, sparteine, N-methylcytisine, 5,6-dehydrolupanine, and lupanine were identified by liquid chromatography-mass spectrometry in the extract of seeds; the most abundant compound of the extract was cytisine. It was observed that the crude extract of Calia secundiflora was moderately active on bacteria and more potent on phytopathogenic fungi. In contrast cytisine showed the opposite effects.

scholarly journals Synthesis, Characterisation and Anti-Fungal Activities of Some New Copper(II) Complexes of Octamethyl Tetraaza-Cyclotetradecadiene

1999 ◽  
Vol 6 (6) ◽  
pp. 345-354 ◽  
Author(s):  
Tapashi G. Roy ◽  
Saroj K. S. Hazari ◽  
Benu K. Dey ◽  
Samar Chakraborti ◽  
Edward R. T. Tiekink
Keyword(s):  
Ligand Substitution ◽  
Phytopathogenic Fungi ◽  
Axial Ligand ◽  
Free State ◽  
Substitution Reactions ◽  
Conductance Data ◽  
Anti Fungal ◽  
Ligand Substitution Reactions

The ligand Me8[14]diene, L, in its free state as well as in the dihydroperchlorate form, L.2HClO4, coordinates copper(ll) in different salts to yield a series of [CuLXx]Xy(H2O)z complexes where X = NO3, ClO4, NCS, Cl and Br; x and y may have values of 0 or 2 and z = 0, 1 or 2. The complex, [CuL(ClO4)2].2H2O is found to undergo axial ligand substitution reactions with SCN- , NO3- and Cl- to give a variety of substitution derivatives: [CuL(ClO4)mXn] where X = NCS, NO3 and Cl; m = 0 or 1, and n = 1 or 2. The complexes .have been characterised on the basis of analytical, spectroscopic, magnetic and conductance data. The anti-fungal activities of the ligand and its complexes have been investigated against a range of phytopathogenic fungi.

scholarly journals Coordination Modes of a Schiff Base Derived from Substituted 2-Aminothiazole with Chromium(III), Manganese(II), Iron(II), Cobalt(II), Nickel(II) and Copper(II) Metal Ions: Synthesis, Spectroscopic and Antimicrobial Studies

2011 ◽  
Vol 8 (4) ◽  
pp. 1750-1764 ◽  
Author(s):  
Ambit Thakar ◽  
Krishnakant Joshi ◽  
Kishor Pandya ◽  
Arvind Pancholi
Keyword(s):  
Schiff Base ◽  
Metal Ions ◽  
Transition Metal Complexes ◽  
Mass Spectra ◽  
Antibacterial Activities ◽  
Molar Conductance ◽  
Spectral Techniques ◽  
H Nmr ◽  
Antimicrobial Studies ◽  
C Nmr

Transition metal complexes of Cr(III), Mn(II), Fe(II), Co(II), Ni(II) and Cu(II) metal ions with general stoichiometry [ML2.2H2O] and [ML3], where M= Mn(II), Cr(III), Fe(II), Co(II), Ni(II) and Cu(II), L= Schiff base derived from the condensation of 2-amino-4(4’-phenyl/methylphenyl)-5-methyl-thiazole with 4-acetyl-1(3-chloro phenyl)-3-methyl-2-pyrazoline-5-ones, have been synthesized and structurally characterized by elemental analysis, molar conductance measurements, magnetic susceptibility measurements and spectral techniques like IR, UV,1H NMR,13C NMR and Mass Spectra. All the complexes were found to be octahedral geometry. The ligand and its complexes have been screened for their antifungal and antibacterial activities against three fungi,i.e. Alternaria brassicae, Aspergillus nigerandFesarium oxysporumand two bacteria,i.e. Xanthomonas compestrisandPseudomonas aeruginosa.

scholarly journals Isoquinoline Alkaloids from Macleaya cordata Active against Plant Microbial Pathogens

2009 ◽  
Vol 4 (11) ◽  
pp. 1934578X0900401 ◽  
Author(s):  
Hao Liu ◽  
Jihua Wang ◽  
Jianglin Zhao ◽  
Shiqiong Lu ◽  
Jingguo Wang ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Antifungal Activity ◽  
Phytopathogenic Fungi ◽  
Microbial Pathogens ◽  
Isoquinoline Alkaloids ◽  
Spectrometric Data ◽  
Whole Plant ◽  
Bioassay Guided Fractionation ◽  
Macleaya Cordata ◽  
Phytopathogenic Fungi And Bacteria

Bioassay-guided fractionation of the crude extract of the whole plant of Macleaya cordata R. Br. led to the isolation of four alkaloids, which were identified as sanguinarine (1), chelerythrine (2), protopine (3) and α-allocryptopine (4) on the basis of their physicochemical and spectrometric data. Compounds 1 and 2 demonstrated a significant antifungal activity against the six test fungi with median inhibitory concentrations (IC50) ranging from 0.47 to 6.13 μg/mL. Compound 1 was the most effective with an IC50 of 0.47 μg/mL on Rhizoctonia solani. Furthermore, compounds 1 and 2 also demonstrated strong antibacterial activity, with IC50 values ranging from 5.01 to 11.3 μg/mL, and minimum inhibitory concentrations (MIC) ranging from 8.0 to 32.0 μg/mL. This is the first report on the activity of the alkaloids from M. cordata against economically important phytopathogenic fungi and bacteria.

scholarly journals Preparation and In Vitro Characterization of Chitosan Nanoparticles and Their Broad-Spectrum Antifungal Action Compared to Antibacterial Activities against Phytopathogens of Tomato

Agronomy ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 21 ◽  
Author(s):  
Jae-Wook OH ◽  
Se Chul Chun ◽  
Murugesan Chandrasekaran
Keyword(s):  
Xanthomonas Campestris ◽  
Phytophthora Capsici ◽  
Chitosan Nanoparticles ◽  
Crop Protection ◽  
Erwinia Carotovora ◽  
Maximum Growth ◽  
Antibacterial Activities ◽  
Antimicrobial Activities ◽  
Phytopathogenic Fungi

The present study was to prepare chitosan nanoparticles (CNPs) from chitosan (CS) to evaluate their in vitro antimicrobial activities against phytopathogens of tomato. We prepared and characterized CNPs for their particle size, polydispersity index, and structures. The antifungal properties of CS and CNPs against phytopathogenic fungi namely Colletotrichum gelosporidies, Phytophthora capsici, Sclerotinia sclerotiorum, Fusarium oxysporum, Gibberella fujikuori were investigated. CNPs showed the maximum growth inhibitory effects on mycelial growth of F. oxysporum followed by P. capsici. We also studied antibacterial activities against phytopathogenic bacteria, such as three strains of Erwinia carotovora subsp. carotovora and one strain of Xanthomonas campestris pv. vesicatoria. Our results showed that both CS and CNPs markedly inhibited the growth of the both Xanthomonas and Erwinia strains. From our study, it is evident that both CS and CNPs have tremendous potential against phytopathogens of tomato for further field screening towards crop protection.

Metabolites from Microsphaeropsis olivacea, an Endophytic Fungus of Pilgerodendron uviferum

2005 ◽  
Vol 60 (1-2) ◽  
pp. 11-21 ◽  
Author(s):  
Emilio Hormazabal ◽  
Luis Astudillo ◽  
Guillermo Schmeda-Hirschmann ◽  
Jaime Rodríguez ◽  
Cristina Theoduloz
Keyword(s):  
Solid Substrate ◽  
Phytopathogenic Fungi ◽  
Lung Fibroblasts ◽  
Moderate Activity ◽  
Malt Extract ◽  
Experimental Conditions ◽  
Solid Media ◽  
Spectroscopic Information ◽  
Phytopathogenic Fungi And Bacteria ◽  
First Time

Seven compounds belonging to different structural skeletons were isolated from Microsphaeropsis olivacea grown in liquid and solid media. The enalin derivative 7-hydroxy-2,4- dimethyl-3(2H)-benzofuranone is reported for the first time, while additional spectroscopic information is provided for the acetates of botrallin and ulocladol. The activity of the isolated compounds was assessed towards the enzyme acetylcholinesterase (AChE) and their cytotoxicity against human lung fibroblasts. Graphislactone A and botrallin presented a moderate activity towards AChE, with IC50 of 8.1 and 6.1 μg/ml (27 and 19 μᴍ, respectively). Under the same experimental conditions, the IC50 of the standard inhibitor galanthamine was 3 μg/ml. The cytotoxicity of both compounds was > 1000 and 330 μᴍ, respectively. None of the compounds was promising as antibacterial or antifungic against phytopathogenic fungi and bacteria. Botrallin and graphislactone A were detected in the liquid potato-dextrose and yeast extract/ malt extract/dextrose as well as on a solid substrate (rice). Butyrolactone I was obtained from the fungus growing on solid medium.

Sign in / Sign up

Export Citation Format

Share Document