Antifungal Activity Of Leaf Extracts Research Articles

Antifungal Activity of Leaf Extract of Alchornea cordifolia Against Aspergillus flavus the causal Agent of Yam Tuber Rot

Rots and mycotoxin contamination of agro-produce are prevalent in tropical world. Aspergillus flavus is a major mycotoxigenic rot contaminant of tubers in Abia state, Nigeria. Consumption of mycotoxin contaminated foodstuffs accounts for 25% of medically important human diseases in Nigeria. The objective of this study was to assess antifungal activity of Alchornea cordifolia against A. flavus a mycotoxigenic rot pathogen of stored tuber produce both in vitro and in vivo. Isolates were made from rotted yam tubers and pathogenicity test carried out to confirm A. flavus as pathogen. Five concentrations (100-500 mg mL-1) of methanol leaf extracts of the plant and thiophanate-methyl–a standard fungicide–were evaluated against the growth of the fungus in culture and pathogen-induced rot development and spread in vivo. The experiment was made up of 7 treatments and 3 replicates laid out in CRD. The plant leaf extract demonstrated varying levels of inhibition of A. flavus in vitro and rot development and spread in living tissues of yam. About 56.38%–68.22% and 67.245–80.01% inhibition was recorded by 100 mg mL-1 and 500 mg mL-1 of A. cordifolia extract for spore germination respectively whereas the same concentrations reduced rot development from 60% in the control experiment to 21.80% and 12.10% respectively which compared favorably (P<0.05) with standard fungicide, thiophanate-methyl. The plant demonstrated strong antifungal activity in vitro and minimized A. flavus induced rot advancement in living yam tissues.

Determination of Antifungal Activity of Leaf Extracts from Hypericum ssp. Against Plant Pathogenic Fungi Fusarium oxysporum and Alternaria Alternata

In this study, the antifungal activity of ethanol extracts of three plant species of Hypericum perforatum, Hypericum scabrum and Hypericum origanifolium were evaluated for against two plant pathogenic fungal species of Fusarium oxysporum and Alternaria alternata.The antifungal activities of Hypericum ssp. extracts (3, 15, 45, 80, 120, 200, 240, 300 ppm) were tested against fungi. Ethanol 30% as control; Commercial fungicide (1 μg/mL) was used as a positive control. All Hypericum ssp. plant extracts were effective in different rates against the fungi depending on the doses. In addition, IC50 values of the three selected plant Hypericum ssp. leaf extract against pathogenic fungus F.oxysporum and A. alternata were determined with of probit analysis. In terms of the IC50 values, the antifungal activity of H. perforatum plant exract against F.oxysporum (122.525 μg/mL) > A.alternata (108.484 μg/mL). On the other hand, IC50 values of H. scabrum against A.alternata (126.390 μg/mL) > F.oxysporum (113.714 μg/mL). Moreover, the IC50 value of H. origanifolium against two pathogenic fungi was calculated as F.oxysporum (159.931 μg/mL) > A.alternata (55.759 μg/mL). Results showed that H.origanifolium has the best fungicidal activity, with IC50 value of 55.759 μg/mL against A.alternata and H.scabrum 113.717 μg/mL against F.oxysporum. However, the highest concentrations (300 ppm) caused completely inhibition in the both fungi mycelial growth followed by lower concentrations of plant extracts. A. alternata were the sensitive fungal species, while the F. oxysporum were a more resistant to the Hypericum ssp. extracts. Based on the antifungal activity tests, these plants extracts this may have effective as the new natural fungicide protecting crops against fungal diseases.

Antifungal activities of leaf extracts from the Capsicum genus

The emergence of microorganisms resistant to antimicrobials has driven the search for new substances aimed at the control and prevention of pathogens. Plant antimicrobial peptides have biotechnological applications in the development of drugs and agricultural inputs for this purpose. The present work aims to evaluate the antifungal activity of extracts containing peptides obtained from the leaves of Capsicum plants. The accessions UENF 1626, 1632 and 1381 and the cultivar Carioquinha were used. The leaves were macerated, and then extraction was performed using a 60% methanol and dichloromethane solution in a 1:1 ratio. The hydromethanolic phase was separated and used for testing after evaporation of methanol. All extracts have a similar electrophoretic profile on tricine gel stained with Coomassie Blue, showing 2 bands of approximately 6.5 and 3.5 kDa. Inhibition of fungal growth with 24 h of culture was performed in liquid culture medium in 96-well plates with reading at 620 nm using extracts with a protein concentration of 200 mg mL-1. The filamentous fungi Fusarium solani, Fusarium lateritium, and Colletotrichum lindemuthianum and the yeasts Candida albicans, Candida buinensis, Candida tropicalis, Saccharomyces cerevisiae, Pichia membranifaciens and Kluyveromyces marxianus were used. The extract with the greatest antifungal potential was the leaves of Capsicum annuum cv. Carioquinha, inhibiting the growth of F. solani by 29%, C. lindemuthianum by 15%, Candida buinensis by 22% and K. marxianus by 24%. Therefore, the extract has peptides with biotechnological potential.

Antifungal Potency of Amaranth Leaf Extract: An In Vitro Study.

Plant diseases are a serious problem for agricultural crops, the food industry and human health. Significant efforts have been made in recent years to find natural products that could reduce the growth of plant pathogens and improve food quality. At present, there is an increased interest in plants as a source of biological active compounds that can protect crops from diseases. Important sources of these phytochemicals are lesser-known pseudocereals such as amaranth. The objective of this study was to determine the antifungal activity of leaf extracts of four amaranth species (A. cruentus, A. hypochondriacus × hybridus, A. retroflexus and A. hybridus). The antifungal potency of amaranth extracts was analyzed against selected strains of fungi. The results suggested that the antimicrobial properties of the tested extracts varied depending on the amaranth species and the fungal strain. The studied extracts inhibited the growth of Fusarium equiseti, Rhizoctonia solani, Trichoderma harzianum and Alternaria alternata. A lower inhibitory effect of the extracts was recorded against F. solani, while no inhibitory effect was observed against F. oxysporum and Colletotrichum coccodes.

GCMS analysis and antifungal activity of leaf extracts of Ailanthus excelsa (Roxb), against Fusarium oxysporum causal agent of Fusarium wilt disease in tomato

GCMS analysis and antifungal activity of leaf extracts of Ailanthus excelsa (Roxb), against Fusarium oxysporum causal agent of Fusarium wilt disease in tomato

Phenolic profile and antifungal activity of leaf extract of Artemisia absinthium L. (Asteraceae)

Phenolic profile and antifungal activity of leaf extract of Artemisia absinthium L. (Asteraceae)

Chemical Profile and Antifungal Activity of Leaf Extract of Tabernaemontana divaricata against Macrophomina phaseolina

Macrophomina phaseolina is a highly problematic fungus that causes diseases in hundreds of plant species. In order to search for an alternative to chemical fungicides for the control of this devastating pathogen, leaf extract of Tabernaemontana divaricata was assessed for the control of M. phaseolina. Five concentrations of leaf extract in methanol viz. 1, 2, 3, 4 and 5% (w/v), were checked against M. phaseolina. All these concentrations significantly suppressed the fungal growth resulting in 34–74% decreased biomass of M. phaseolina over control. GC-MS analysis of this extract showed the presence of 54 compounds. Squalene was the predominant compound with 24.11% peak area followed by vitamin E (8.96%). Other important compounds were hexadecanoic acid, 2-hydroxy-1-(hydroxymethyl)ethyl ester (6.21%), thiophene, tetrahydro-2-methyl- (5.68%), cyclopentanol (5.61%), neophytadiene (6.25%), 1-tert-butoxypropan-2-yl 2-methylbutanoate (6.03%), ibogamine-18-carboxylic acid, 12-methoxy-, methyl ester (2.95%), phytol (2.26%), and n-hexadecanoic acid (2.20%). Some of these major compounds might be responsible for antifungal property of methanolic leaf extract of T. divaricata against M. phaseolina.

In vitro Antifungal Activity of Extracts of Moringa oleifera on Phytopathogenic Fungi Affecting Carica papaya

BACKGROUND: Plants remain the natural sources of efficacious phytonutrients with beneficial assets to mankind against microbial disorders. Diverse folklores have reported the roles of medicinal plants in the remedies of various disorders in man and animals. Metabolites and pesticides from the plant origin are considered better alternatives due to favorable environmental impact as compared to the synthetic counterparts. Significant economic losses and hindrance of global papaya production are due to fungal diseases. Phytochemicals have made medicinal plants become sources of environmentally friendly alternative antimicrobials. AIM: This study aimed at assessing the antifungal activity of leaf extracts of Moringa oleifera against phytopathogenic fungi isolated from Carica papaya. METHODS: n-Hexane, ethyl acetate, ethanol, methanol, and aqueous extracts of M. oleifera leaves were evaluated for their antifungal properties. Agar well-diffusion method was implemented for in vitro screening, minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) of the extract types against fungal species of Aspergillus, Penicillium, Rhizopus, and Trichoderma. RESULTS: All the extracts evaluated inhibited fungal growth to some degree, with the aqueous extract exhibiting more inhibitory activities than the organic extracts. There was significant inhibition of fungal development by the tested plant extracts at different concentrations. MIC of the extracts was 15.625 mg/ml while the MFC values ranged between 15.625 and 31.25. In this work, the antifungal activity of M. oleifera was found to be equal or higher than commercially available fungicide, ketoconazole. CONCLUSION: The results of this study indicate that foliole extracts of M. oleifera have potential for use as biofungicides for plant protection against fungal diseases.

In vitro antifungal activity of leaf extract of Butea monosperma against some phytopathogenic fungi

In vitro antifungal activity of leaf extract of Butea monosperma against some phytopathogenic fungi

Antifungal activity of leaf extract against mycotoxin producing fungi

About 90% of the world food crops are being produced by using seeds. Healthy seeds are important for production of healthy crop and these seeds are also responsible for disease transmission. It happens either in field or in post-harvest storage condition. Due to these seed borne fungi, seed get deteriorated which may cause a great economic loss as well as several types of abnormalities occur in seeds. Major storage grain fungi contaminated with mycotoxin, mycotoxins contaminants of fungal origin occurring worldwide and characterized by its acute and chronic toxic effects on human health. In the present attempt were made to study the antifungal activity of leaf extract against mycotoxin producing fungi. Fungi isolated from stored seed grains like cereals, pulses, infected oil seeds were collected from from Marathwada region of Maharashtra, India. Antifungal activity of leaf extract of Calotropis procera, Azadirachta indica, Ocimum sanctum, Withania somnifera and Datura metel were tested against Alternaria alternata, Aspergillus flavus, Aspergillus ochraceus, Fusarium gramineorum and Penicillium citrinum by using 96-well plate method. Leaf extract showed remarkable activity against tested fungi at different concentrations as Minimum Inhibitory Concentration. The leaf extract of Calotropis procera and Azadirachta indica, have good potential antifungal properties against different mycotoxin producing fungi.

Saudi Rosmarinus officinalis and Ocimum basilicum L. Polyphenols and Biological Activities

Investigating the polyphenolic profile of natural Rosmarinus officinalis and Ocimum basilicum populations may reveal essential compounds that have biological activities. Natural populations of R. officinalis and O. basilicum in Northern Riyadh were investigated by HPLC-DAD analyses. Several polyphenols, including rosmarinic acid, gentisic acid, 3,4-dihydroxyphenylacetic acid, rutoside, and others, out of 38 screened were confirmed. Rosmarinic acid was the major polyphenol in both of R. officinalis and O. basilicum. R. officinalis methanolic leaf extracts contained other phenols such as gentisic acid while O. basilicum contained also 3,4-dihydroxyphenylacetic acid and rutoside as well as others. R. officinalis showed higher antioxidant activities than O. basilicum using 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), and β-carotene bleaching assays. These higher activities are associated with a higher composition of rosmarinic acid in leaf extracts. The antioxidant activities of O. basilicum were attributed to identified phenols of rosmarinic acid, 3,4-dihydroxyphenylacetic acid, and rutoside. There were antiproliferative and cytotoxic activities of leaf extracts, as well as identified polyphenols, against several cancer cells. These activities were attributed to the accumulation of necrotic and apoptotic cells in treated cancer cells with leaf extracts as well as identified polyphenols. The antibacterial and antifungal activities of leaf extracts were mainly attributed to 3,4-dihydroxyphenylacetic acid and rutoside in O. basilicum and rosmarinic acid and caffeic acid in R. officinalis. This study proved that R. officinalis and O. basilicum natural populations might be considered as promising sources of natural polyphenols with biological activities.

Antifungal activity of leaf extract of Mansoa alliacea against Colletotrichum acutatum the cause of anthracnose disease on chili pepper

Antifungal activity of the leaf extract of Mansoa alliacea against Colletotrichum acutatum the cause of anthracnose disease on chili pepper was be done. The antifungal activity was determined based on the effects of plant extract to the fungal growth, spore’s formation, spore’s germination and total biomass. Results of this study showed that the crude extract of Mansoa alliacea obviously inhibited the growth of Colletotrichum acutatum on PDA with MIC by 0.7% (w/v). Treatment with leaf extract of Mansoa alliacea significantly (P<0.05) inhibited the fungal growth, spore’s formation, spore’s germination and fungal biomass of Colletotrichum acutatum. The inhibitory activity for the colony radial growth, spore’s formation, spore’s germination, and fungal biomass were respectively ranged from 29.72 to 81.11%, 63.18 to 100%, 61.68 to 100% and 39.53 to 91.86%. This result suggested that the leaf extract of Mansoa alliacea contains the antifungal susbtances that responsable for the antifungal activity such as phenol and alkaloid, so this extract can be considered as one of alternative measures to control the anthracnose disease on chili pepper.

In vitro antifungal activity of leaf extract of myrtle (Myrtus Communis L.) against phytopathogenic fungi

In vitro antifungal activity of leaf extract of myrtle (Myrtus Communis L.) against phytopathogenic fungi

Antifungal Activity of leaf extracts of Nerium indicum against Pathogenic Fungi Aspergillus spp.

Antifungal Activity of leaf extracts of Nerium indicum against Pathogenic Fungi Aspergillus spp.

Heuchera Creme Brulee and Mahogany Medicinal Value under Water Stress and Oligosaccharide (COS) Treatment.

Food borne pathogens cause serious human illnesses and diseases and their control using natural bioactive compounds becomes essential for the progress of agricultural and food industries. Developing novel tools to enhance the medicinal values of traditional horticultural medicinal crops is one of the promising methods for achieving food borne pathogens control. In this study, oligosaccharide water solutions were applied to Heuchera Creme Brulee and Mahogany subjected to a normal irrigation interval (2 days) or to prolonged irrigation intervals (6 days) for 6 weeks. Plant morphological, physiological, and metabolic markers associated with the bioactivity of leaf extracts against selected microbes. Oligosaccharide-treated plants showed significant increases in all morphological parameters during normal and prolonged irrigation intervals as compared to those of the controls. Morphological improvement associated with a significant increase in chlorophyll, carbohydrates, proline, K, Ca, phenols, and free and total ascorbate and antioxidants. Superoxide dismutase, catalase, and ascorbate peroxidase activities were higher, while H2O2 accumulated to a lower extent in oligosaccharide-treated plants. These morphological and metabolic changes associated with increased antibacterial and antifungal activities of leaf extracts and their activities were comparable to antibiotics and antifungal agents (minimum inhibitory concentrations values were 0.5 -0.20 mg−1mL for bacteria and 0.08 -0.20 mg−1mL for fungi in Mahogany). The application of oligosaccharide and/or water stress might be of great value for producing natural bioactive compounds for food borne pathogens control.

Assessment of in vitro Antibacterial and Antifungal Activities of Leaf Extracts of Melia azedarach Linn

The present study was aimed to analyse in vitro, the antibacterial and antifungal activities of the leaf extracts of Melia azedarach. Leaves were extracted using different solvents such as ethanol, methanol and acetone by hot percolation method. Antibacterial and antifungal activity was measured using agar well diffusion assay and broth microdilution methods, respectively against different pathogenic bacteria and fungi. Thin-layer chromatography-directed bioautography was performed to determine the phytochemicals of the extracts and their antimicrobial activity. The gas chromatography-mass spectroscopy analysis was performed for the isolated active components exhibited antimicrobial activity. Among the various extracts tested, ethanol extract showed significant antimicrobial activity and exhibited zone of inhibition of 16 mm against Bacillus subtilis, 15 mm against Staphylococcus aureus, 14 mm against both Vibrio cholerae and Klebsiella pneumoniae, 12 mm against both Escherichia coli and Pseudomonas aeruginosa. The ethanol extract showed minimum inhibitory concentration of 250 μg/ml against both Aspergillus niger and Candida albicans. Phytocompounds in the ethanol extract were separated using TLC chromatogram and it showed seven spots. The bioautography of TLC chromatogram showed single band exhibited antibacterial activity and phytocompound from this band was isolated and identified as 5,6,7,8-tetrahydro-1,2,4-benzotriazine-3-amine using gas chromatography-mass spectroscopy analyses. The ethanol extract of leaf of Melia azedarach exhibited significant antimicrobial activity and the compound 5,6,7,8-tetrahydro-1,2,4-benzotriazine-3-amine might be responsible for antimicrobial activity.

Antioxidant and antifungal activity of Geophila repens (L.) I. M. Johnst. (Rubiaceae)

Objectives: The present study was conducted to investigate the potential of leaf extract of Geophila repens (L.) I.M. Johnst. (Rubiaceae) to exhibit antioxidant and antifungal potential.&#x0D; Methods: Extraction of powdered leaf material was carried out by maceration process using methanol. Antioxidant activity of leaf extract was assessed by DPPH free radical scavenging assay and ferric reducing assay. Antifungal activity of leaf extract was determined by Poisoned food technique.&#x0D; Results: Leaf extract was shown to scavenge DPPH radicals dose dependently with IC50 value of 51.39µg/ml. An increase in the absorbance on increasing concentration of leaf extract indicated ferric reducing activity. The extract showed more or less similar inhibitory activity against Aspergillus niger and Bipolaris sp. (&gt;50% inhibition).&#x0D; Conclusion: The results of the study indicate that leaf extract possesses bioactive principles with activity against oxidative damage and seed-borne fungi which are to be purified and screened for antioxidant and antifungal activity.&#x0D; Keywords: Geophila repens, Maceration, DPPH, Ferric reducing, Seed-borne fungi, Poisoned food technique

Antibacterial and Antifungal Activity of Leaf Extracts of Pedalium murex L.

Antibacterial and Antifungal Activity of Leaf Extracts of Pedalium murex L.

Phytochemical and Antifungal Activity of Leaf Extracts of Prosopis africana and Anacardium occidentale against Macrophomina Root Rot of Sesamum indicum L. in Benue State, Central Nigeria

This study investigated the antifungal activity of leaf extracts of Prosopis africana and Anacardium occidentale against Macrophomina phaseolina, the causal agent of root rot of Sesamum indicum L. Phytochemical analysis of the two plants showed the presence of alkaloids, saponins, tannins, flavonoids and anthraquinones in petroleum ether, ethyl acetate, methanol and water extracts. The effectiveness of the two medicinal plants viz: P. africana and A. occidentale was tested against the causative agent of root rot of Sesamum indicum L. The effect of plant leaf extracts on mycelia growth of the test organism shows that both P. africana and A. anacardium reduced the mycelia growth significantly as compared to the control (plate, 2, 3, 4). The antifungal property of P. africana and A. occidentale makes these plants of potential interest for the control of the fungi Macrophomina phaseolina.

Phytochemical analysis, Antimicrobial, insecticidal and antiradical activity of &lt;em&gt;Hydnocarpus pentandra&lt;/em&gt; (Buch.-Ham.) Oken

&lt;p&gt;&lt;strong&gt;Objectives&lt;/strong&gt;: The present study was conducted to evaluate antimicrobial, insecticidal and radical scavenging activity of leaf extract of &lt;em&gt;Hydnocarpus pentandra&lt;/em&gt; (Buch.-Ham.) Oken belonging to the family Achariaceae.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Methods&lt;/strong&gt;: Extraction process of shade dried and powdered leaf was carried out by maceration technique. Extract was screened for phytochemicals by standard tests. Antibacterial and antifungal activity of leaf extract was determined by Agar well diffusion and Poisoned food technique respectively. Antiradical activity of leaf extract was evaluated by two in vitro assays namely 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2-azinobis 3-ethylbenzothiazoline 6-sulfonate (ABTS) free radical scavenging assays. Insecticidal activity of leaf extract was determined against II instar and IV instar larvae of &lt;em&gt;Aedes aegypti&lt;/em&gt;.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results&lt;/strong&gt;: Preliminary phytochemical analysis showed the presence of alkaloids, flavonoids, tannins, saponins, glycosides, triterpenes and steroids in the leaf extract. Leaf extract exhibited marked inhibitory activity against Gram positive bacteria when compared to Gram negative bacteria. &lt;em&gt;Bacillus cereus&lt;/em&gt; (zone of inhibition 1.86±0.05cm) and &lt;em&gt;Escherichia coli&lt;/em&gt; (zone of inhibition 1.06±0.05cm) were inhibited to highest and least extent respectively. Extract was effective in inhibiting mycelial growth of seed-borne fungi. Among fungi, the susceptibility to extract was in the order: &lt;em&gt;Curvularia&lt;/em&gt; sp. (53.64% inhibition) &amp;gt; &lt;em&gt;Fusarium&lt;/em&gt; sp. (45.81% inhibition) &amp;gt; &lt;em&gt;Alternaria&lt;/em&gt; sp. (35.08% inhibition). The extract exhibited concentration dependent larvicidal activity with marked activity being observed against II instar larvae (LC&lt;sub&gt;50&lt;/sub&gt; value 0.79mg/ml) when compared to IV instar larvae (LC&lt;sub&gt;50&lt;/sub&gt; value 1.37mg/ml). Leaf extract scavenged DPPH and ABTS radicals dose dependently with an IC&lt;sub&gt;50&lt;/sub&gt; value of 13.91µg/ml and 6.03µg/ml respectively.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusions&lt;/strong&gt;: The plant is shown to be an important source of bioactive agents. The observed bioactivities could be attributed to the phytochemicals present in the leaf extract. Further studies on characterization and bioactivity determination of isolated components from leaf extract are to be carried out.&lt;/p&gt;