scholarly journals Characterization of the antifungal activity of three rhizobacterial strains against Rhizoctonia solani

2019 ◽  
Vol 16 (4) ◽  
pp. e1011
Author(s):  
Deisy Y. Pineda-Mendoza ◽  
Apolinar González-Mancilla ◽  
Juan J. Almaraz ◽  
María P. Rodríguez-Guzmán ◽  
Oscar García-Barradas ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Rhizoctonia Solani ◽  
Inhibitory Effect ◽  
Phytopathogenic Fungi ◽  
Dual Culture ◽  
Potato Dextrose Broth ◽  
Potato Dextrose Agar Medium ◽  
Fungal Inhibition ◽  
The One

 In this study, three rhizobacterial strains were characterized by their ability to inhibit Rhizoctonia solani and tested in chili (Capsicum annuum L.) seedlings. Strains A46 and P61 were identified as Pseudomonas tolaasii, and S108 as Rhanella aquatilis. In the dual culture tests, all the strains inhibited the radial growth of R. solani. None of the three strains produced chitinases or volatile compounds, but they were found to produce siderophores. However, this last characteristic was not responsible for the rhizobacterial inhibitory effect on the growth of R. solani, other bacterial metabolites were possibly involved. The bacterial filtrates added to the potato dextrose agar medium (PDA) in a 3:7 ratio had significant antifungal activity, being the filtrate from strain S108 the one that showed the highest effect, with 56% fungal inhibition. The co-culture of strain A46 with the phytopathogenic fungi in potato dextrose broth (PDB) increased the antifungal activity of the rhizobacterial filtrate. The application of the rhizobacterial strains to Serrano chili decreased the R. solani-related mortality rate in seedlings; particularly, S108 had the greatest effect, which was similar to the fungicide effect. This study showed that the S108 strain has potential as a biofungicide to control R. solani in chili seedlings.

scholarly journals Growth Inhibition of Phytopathogenic Fungi and Oomycetes by Basidiomycete Irpex lacteus and Identification of its Antimicrobial Extracellular Metabolites

2021 ◽  
Vol 70 (1) ◽  
pp. 131-136
Author(s):  
DAISY PINEDA-SUAZO ◽  
JOSAPHAT MIGUEL MONTERO-VARGAS ◽  
JOSÉ JUAN ORDAZ-ORTIZ ◽  
GERARDO VÁZQUEZ-MARRUFO
Keyword(s):  
Antifungal Activity ◽  
Growth Inhibition ◽  
Inhibitory Effect ◽  
Phytopathogenic Fungi ◽  
Dual Culture ◽  
Fusarium Spp ◽  
Irpex Lacteus ◽  
Phytophthora Spp ◽  
Extracellular Metabolites ◽  
Colletotrichum Spp

In dual culture confrontation assays, basidiomycete Irpex lacteus efficiently antagonized Fusarium spp., Colletotrichum spp., and Phytophthora spp. phytopathogenic strains, with growth inhibition percentages between 16.7–46.3%. Antibiosis assays evaluating the inhibitory effect of soluble extracellular metabolites indicated I. lacteus strain inhibited phytopathogens growth between 32.0–86.7%. Metabolites in the extracellular broth filtrate, identified by UPLC-QTOF mass spectrometer, included nine terpenes, two aldehydes, and derivatives ofa polyketide, a quinazoline, and a xanthone, several of which had antifungal activity. I. lacteus strain and its extracellular metabolites might be valuable tools for phytopathogenic fungi and oomycete biocontrol of agricultural relevance.

scholarly journals Activity of Alkanediol Alkanoates against Pathogenic Plant Fungi Rhizoctonia solani and Sclerotium rolfsii

2012 ◽  
Vol 7 (9) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Paraj Shukla ◽  
Suresh Walia ◽  
Vivek Ahluwalia ◽  
Balraj S. Parmar ◽  
Muraleedharan G. Nair
Keyword(s):  
Antifungal Activity ◽  
Ethylene Glycol ◽  
Rhizoctonia Solani ◽  
Diethylene Glycol ◽  
Sclerotium Rolfsii ◽  
Phytopathogenic Fungi ◽  
Dependent Manner ◽  
Acyl Chlorides ◽  
Mass Spectral ◽  
Dose Dependent

Thirty known dialkanoates of ethylene, propylene and diethylene glycols were synthesized by reacting the glycols with acyl chlorides and their structures confirmed by IR, NMR and mass spectral analyses. They exhibited significant antifungal activity against two phytopathogenic fungi Rhizoctonia solani Kuehn and Sclerotium rolfsii Sacc in a dose dependent manner. Propylene glycol dipentanoate was the most active against R. solani. followed by diethylene glycol dibutanoate and ethylene glycol dibutanoate. Against S. rolfsii ethylene glycol diheptanoate was found to be most active followed by diethylene glycol diisobutanoate As compared to the standard reference benomyl (EC50 5.16 μg/mL), the potential alkanediol dialkanoates showed EC50 in the range of 33 – 60 μg/mL.

Role of chitinase and β-1,3-glucanase activities produced by a fluorescent pseudomonad and in vitro inhibition of Phytophthora capsici and Rhizoctonia solani

2007 ◽  
Vol 53 (2) ◽  
pp. 207-212 ◽  
Author(s):  
Naveen Kumar Arora ◽  
Min Jeong Kim ◽  
Sun Chul Kang ◽  
Dinesh Kumar Maheshwari
Keyword(s):  
Rhizoctonia Solani ◽  
Phytophthora Capsici ◽  
Phytopathogenic Fungi ◽  
Culture Technique ◽  
Dual Culture ◽  
Fluorescent Pseudomonad ◽  
Antifungal Metabolites ◽  
Fluorescent Pseudomonas

A study was conducted to investigate the possibility of involvement of chitinase and β-1,3-glucanase of an antagonistic fluorescent Pseudomonas in growth suppression of phytopathogenic fungi, Phytophthora capsici and Rhizoctonia solani . Fluorescent Pseudomonas isolates GRC3 and GRC4 were screened for their antifungal potential against phytopathogenic fungi by using dual culture technique both on solid and liquid media. The percent inhibition was calculated. Various parameters were monitored for optimization of enzyme activities by fluorescent Pseudomonas GRC3. The involvement of chitinases, β-1,3-glucanases, and antifungal metabolites of nonenzymatic nature was correlated with the inhibition of P. capsici and R. solani. The results provide evidence for antibiosis as a mechanism for antagonism. The study also confirms that multiple mechanisms are involved in suppressing phytopathogens as evidenced by the involvement of chitinase and β-1,3-glucanase in inhibition of R. solani but not P. capsici by isolate GRC3.

Antifungal Activity of Oosporein from an Antagonistic Fungus against Phytophthora infestans

2004 ◽  
Vol 59 (3-4) ◽  
pp. 302-304 ◽  
Author(s):  
Toshinori Nagaoka ◽  
Kengo Nakata ◽  
Kenji Kouno
Keyword(s):  
Antifungal Activity ◽  
Phytophthora Infestans ◽  
Inhibitory Effect ◽  
Phytopathogenic Fungi ◽  
Growth Inhibitory Effect ◽  
Antifungal Metabolite ◽  
Antagonistic Effects ◽  
Significant Growth ◽  
Growth Inhibitory

An antifungal metabolite, oosporein, was isolated from the culture of Verticillium psalliotae that produced the antagonistic effects on Phytophthora infestans. Oosporein exhibited a significant growth-inhibitory effect on P. infestans in comparison with other phytopathogenic fungi.

Antifungal activity of nano emulsions of neem and citronella oils against phytopathogenic fungi, Rhizoctonia solani and Sclerotium rolfsii

2017 ◽  
Vol 108 ◽  
pp. 379-387 ◽  
Author(s):  
Eisa Osman Mohamed Ali ◽  
Najam Akhtar Shakil ◽  
Virendra Singh Rana ◽  
Dhruba Jyoti Sarkar ◽  
Sujan Majumder ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Rhizoctonia Solani ◽  
Sclerotium Rolfsii ◽  
Phytopathogenic Fungi

Characterization of antifungal activity of Paenibacillus ehimensis KWN38 against soilborne phytopathogenic fungi belonging to various taxonomic groups

2013 ◽  
Vol 64 (1) ◽  
pp. 55-63 ◽  
Author(s):  
Kyaw Wai Naing ◽  
Muhammad Anees ◽  
Sang Jun Kim ◽  
Yi Nam ◽  
Young Cheol Kim ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Phytopathogenic Fungi ◽  
Taxonomic Groups ◽  
Paenibacillus Ehimensis

scholarly journals Allelopathic effect of leaf extracts of Punica granatum and Spiraea prunifolia against post-harvest rot of tomato and brinjal

2020 ◽  
Vol 10 (2-s) ◽  
pp. 1-6
Author(s):  
Jahangir Abdullah Koka ◽  
Mohd Yaqub Bhat ◽  
Abdul Hamid Wani
Keyword(s):  
Antifungal Activity ◽  
Rhizoctonia Solani ◽  
Plant Extracts ◽  
Alternaria Alternata ◽  
Ethanolic Extract ◽  
Punica Granatum ◽  
Inhibitory Effect ◽  
Penicillium Expansum ◽  
Antimycotic Activity ◽  
Punica Granatum L

Antimycotic activities of different solvent extracts of Punica granatum L. and Spiraea prunifolia Siebold and Zucc. were carried out through agar well diffusion assay at three concentrations (25µl, 50µl and 75µl) against seven fungi causing rot diseases of tomato and brinjal. All the concentration of plant extracts showed antifungal activity against tested pathogenic fungi. Antimycotic activity increased with the increased concentrations of plant extracts. However, higher concentrations proved more effective than lower concentrations. It was revealed from the present study that the ethanolic extract of Punica granatum L. showed maximum antifungal activity against Rhizoctonia solani and Penicillium expansum and least inhibitory activity against Aspergillus niger. However, the aqueous extract of Punica granatum L. showed maximum antimycotic activity against Rhizoctonia solani and Alternaria alternata and least inhibitory effect against Penicillium expansum. It was further observed from the present study that the ethanolic extract of Spiraea prunifolia Siebold and Zucc. showed maximum antimycotic activity against Rhizoctonia solani and least inhibitory effect against Alternaria alternata. Whereas the aqueous extract of Spiraea prunifolia Siebold and Zucc showed maximum antifungal activity against Aspergillus niger and least inhibitory activity against Alternaria alternata. Keywords: Plant extracts, Concentration, Antimycotic effectiveness, tomato and brinjal, fungal rot pathogens, Inhibition zone.

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