Influence of Rhizobium, Pseudomonas and Mycorrhiza on Some Physiological Traits of Red Beans (Phaseolus vulgaris L.) under different irrigation conditions

This study was conducted to evaluate response red bean (CV. Goli) under drought stress conditions for three types of biological fertilizers in 2014 - 2015 years. A split plot experiment was conducted in Tabriz, Iran. Irrigation levels (irrigation after 70, 110, and 150 mm of evaporation from pan) were considered as main plots, and biological fertilizers Rhizobium (Rp), Mycorrhiza (My), Pseudomonas (Ps), Rp + My, Rp + Ps, Rp + My + Ps, and non-inoculation (control) were considered as sub plots. Combination of Rhizobium, Mycorrhiza, and Pseudomonas at irrigation level of more than 70 mm of evaporation had the highest grain yield, RWC, CCI, stomata conductance, leaf water potential and lowest cell leakage. Triple inoculation increased grain yield in comparison to the control, or to the time they were used individually or simultaneously; it also reduced the negative effects of drought stress on the beans.

Activity of Antibiotic Bacterial Isolate Kp13 and Cell Leakage Analysis of Escherichia coli Bacteria

A bacterium is one of microorganisms that can produce secondary metabolite, such as antibiotic. KP13 isolate is a bacterium isolated from Melaleucaleuca dendron L rhizosphere. The aim of this study is to know the eff ect of the most active fraction antibacterium of KP13 isolate toward Escherichia coli bacterium and the ability to caused cell leakage. Extraction of antibiotic was conducted by ethyl acetate. Extract is fractioned with a n-heksan-etilacetate solvent gradient another uses a solvent methanol. Each fraction is done by KLT and grouped based on RF value. A fraction group is compare by inhibition eff ectiveness. Then, the Minimum Inhibitory Concentration (MIC) from the most active group is tested. Cell leakage analysis was performed using UV spectrophotometry to detect the release of nucleic acid and protein. Atomic Absorption Spectrophotometry (AAS) was used to detect ion release of K+ and Ca2+ from. cell of bacteria. The results showed that the most active fraction against Escherichia coli was the fraction number 1 with MIC value of 5% and inhibition zone of 7.33±0.58 mm.

ANTIBACTERIAL ACTIVITY OF FRUIT BANANA STONE AND MECHANISM

Objective: The purpose of this study was to determine the strength of antibacterial activity of the fraction of banana stone and its mechanism.Methods: The antibacterial activity test was performed using the diffusion method by measuring the diameter of the clear zone around the disc paper.Results: The results of antibacterial activity test showed that ethyl acetate fraction was more effective against bacterium Staphylococcus aureus, Staphylococcus epidermidis, and Propionibacterium acnes compared to n-hexane fraction.Conclusion: The resulting cellular metabolite leak showed that cell leakage in the three bacteria due to ethyl acetate fraction had leaked more protein than nucleic acid, while the leakage of more dissolved K+ ion than Ca2 + ions.

Antibacterial Compound Identification of Cayenne Pepper Leaf Extract (Capsicum frutescens L.) against Klebsiella pneumoniae and Cell Leakage Mechanism

Pneumonia is an acute inflammation of the pulmonary parenchyma that can be caused by Klebsiella pneumoniae. This study aims to determine the active fraction of cayenne pepper leaves on the growth of K. pneumoniae. Cayenne pepper leaf which previously defatted using n-hexane was macerated with 95% ethanol, then fractionated successively with dichloromethane, ethyl acetate and methanol. Ethanol extract and each fraction with concentration of 40% were tested for their antibacterial activity against K. pneumoniae using disc diffusion method (Kirby-Bauer). 1% amoxicillin was used as positive control and Dimethyl sulfoxide (DMSO) as negative control. The Minimum Inhibitory Concentration (MIC) of the most active fraction was then determined. Determination of antibacterial compound in the most active fraction was carried out by TLC-bioautography and followed by Gass Chromatography Mass Spectrophotometry. Cell leakage analysis was performed using UV spectrophotometry to detect the release of protein and nucleic acid, as well as Atomic Absorption Spectrophotometry was used to detect ion release of K+ and Ca2+. The results showed that the most active fraction against K. pneumoniae was the ethyl acetate fraction with MIC value of 10% and inhibition zone of 7.25±0.25 mm. TLC-Bioautography of ethyl acetate fraction with eluen n-hexane: ethyl acetate (6:4) obtained an active stain at Rf 0.12. Compounds having 94% similarity with 1-propanol, 2-amino was predicted as the active compound.

ALLIUM SATIVUM LINN. CONTAINS LINEAR ALKYLBENZENE SULFONATES THAT ALTER MEMBRANE FLUIDITY FOR THE INHIBITION OF MYCOBACTERIUM TUBERCULOSIS H37RA

Objectives: The purpose of the study is to characterize antimycobacterial phytoconstituent from ethyl acetate extract of dried bulbs of Allium sativum Linn. (Alliaceae) and elucidating the probable mode of action of the bioactive molecule.Methods: Serial extraction, Mycobacterium tuberculosis assay by agar well diffusion method, minimal inhibitory concentration by microplate alamar blue assay, Fourier transform infrared (FT-IR), nuclear magnetic resonance (NMR) spectroscopy, liquid chromatography (LC)-electrospray ionization (ESI)-mass spectrometry (MS)/MS, cell leakage assay, scanning electron microscopy (SEM), inhibition property of linear alkylbenzene sulfonate (LAS) in the presence of rifampicin on M. tuberculosis were performed.Results: Ethyl acetate extract displayed significant inhibition properties against M. tuberculosis H37Ra (MTCC 300). Subsequently, the bioactivity-guided fractionation was employed to purify the phytochemical. Analysis of FT-IR, LC-MS (ESI), 1H, and13C-NMR spectrum revealed that the bioactive phytochemicals are the variants of LAS, with C12-alkyl being predominant, and the minimum inhibitory concentration was found to be 5.56 μg/ml. Morphological examination by SEM and cell leakage assay indicated that these molecules change the membrane fluidity.Conclusion: The results thus suggest the possibility of using low concentrations of LAS to effect changes in membrane fluidity, thereby enhancing the efficacy of antibiotic treatment.