Antifungal activity in vitro of propolis solutions from Argentina against two plant pathogenic fungi: Didymella bryoniae and Rhizotocnia solani

2014 ◽  
Vol 53 (4) ◽  
pp. 438-440
Author(s):  
Liliana Gallez ◽  
Mirta Kiehr ◽  
Leticia Fernández ◽  
Rolf Delhey ◽  
Débora Stikar
Keyword(s):  
Antifungal Activity ◽  
Pathogenic Fungi ◽  
Plant Pathogenic Fungi ◽  
Didymella Bryoniae

scholarly journals Hevein-Like Antimicrobial Peptides Wamps: Structure–Function Relationship in Antifungal Activity and Sensitization of Plant Pathogenic Fungi to Tebuconazole by WAMP-2-Derived Peptides

2020 ◽  
Vol 21 (21) ◽  
pp. 7912 ◽  
Author(s):  
Tatyana Odintsova ◽  
Larisa Shcherbakova ◽  
Marina Slezina ◽  
Tatyana Pasechnik ◽  
Bakhyt Kartabaeva ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Antimicrobial Peptides ◽  
Structure Function ◽  
Spore Germination ◽  
Pathogenic Fungi ◽  
Plant Pathogenic Fungi ◽  
Fungal Cell ◽  
Structure Function Relationship ◽  
Function Relationship

Hevein-like antimicrobial peptides (AMPs) comprise a family of plant AMPs with antifungal activity, which harbor a chitin-binding site involved in interactions with chitin of fungal cell walls. However, the mode of action of hevein-like AMPs remains poorly understood. This work reports the structure–function relationship in WAMPs—hevein-like AMPs found in wheat (Triticum kiharae Dorof. et Migush.) and later in other Poaceae species. The effect of WAMP homologues differing at position 34 and the antifungal activity of peptide fragments derived from the central, N- and C-terminal regions of one of the WAMPs, namely WAMP-2, on spore germination of different plant pathogenic fungi were studied. Additionally, the ability of WAMP-2-derived peptides to potentiate the fungicidal effect of tebuconazole, one of the triazole fungicides, towards five cereal-damaging fungi was explored in vitro by co-application of WAMP-2 fragments with Folicur® EC 250 (25% tebuconazole). The antifungal activity of WAMP homologues and WAMP-2-derived peptides varied depending on the fungus, suggesting multiple modes of action for WAMPs against diverse pathogens. Folicur® combined with the WAMP-2 fragments inhibited the spore germination at a much greater level than the fungicide alone, and the type of interactions was either synergistic or additive, depending on the target fungus and concentration combinations of the compounds. The combinations, which resulted in synergism and drastically enhanced the sensitivity to tebuconazole, were revealed for all five fungi by a checkerboard assay. The ability to synergistically interact with a fungicide and exacerbate the sensitivity of plant pathogenic fungi to a commercial antifungal agent is a novel and previously uninvestigated property of hevein-like AMPs.

scholarly journals Antifungal Activity of Silver Ions and Nanoparticles on Phytopathogenic Fungi

Plant Disease ◽  
2009 ◽  
Vol 93 (10) ◽  
pp. 1037-1043 ◽  
Author(s):  
Young-Ki Jo ◽  
Byung H. Kim ◽  
Geunhwa Jung
Keyword(s):  
Antifungal Activity ◽  
Colony Formation ◽  
Magnaporthe Grisea ◽  
Silver Ions ◽  
Pathogenic Fungi ◽  
Chloride Ions ◽  
Plant Diseases ◽  
Plant Pathogenic Fungi ◽  
In Planta

Silver in ionic or nanoparticle forms has a high antimicrobial activity and is therefore widely used for various sterilization purposes including materials of medical devices and water sanitization. There have been relatively few studies on the applicability of silver to control plant diseases. Various forms of silver ions and nanoparticles were tested in the current study to examine the antifungal activity on two plant-pathogenic fungi, Bipolaris sorokiniana and Magnaporthe grisea. In vitro petri dish assays indicated that silver ions and nanoparticles had a significant effect on the colony formation of these two pathogens. Effective concentrations of the silver compounds inhibiting colony formation by 50% (EC50) were higher for B. sorokiniana than for M. grisea. The inhibitory effect on colony formation significantly diminished after silver cations were neutralized with chloride ions. Growth chamber inoculation assays further confirmed that both ionic and nanoparticle silver significantly reduced these two fungal diseases on perennial ryegrass (Lolium perenne). Particularly, silver ions and nanoparticles effectively reduced disease severity with an application at 3 h before spore inoculation, but their efficacy significantly diminished when applied at 24 h after inoculation. The in vitro and in planta evaluations of silver indicated that both silver ions and nanoparticles influence colony formation of spores and disease progress of plant-pathogenic fungi. In planta efficacy of silver ions and nanoparticles is much greater with preventative application, which may promote the direct contact of silver with spores and germ tubes, and inhibit their viability.

Activity of Armillarisin B in vitro against Plant Pathogenic Fungi

2009 ◽  
Vol 64 (11-12) ◽  
pp. 790-792 ◽  
Author(s):  
Jin-Wen Shen ◽  
Bing-Ji Ma ◽  
Wen Li ◽  
Hai-You Yu ◽  
Ting-Ting Wu ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Methanolic Extract ◽  
Pathogenic Fungi ◽  
2D Nmr ◽  
Spectroscopic Studies ◽  
Gibberella Zeae ◽  
Plant Pathogenic Fungi ◽  
Fruiting Bodies ◽  
Bioassay Guided Fractionation

The methanolic extract of the fruiting bodies of the mushroom Armillariella tabescens was found to show antifungal activity against Gibberella zeae. The active compound was isolated from the fruiting bodies of A. tabescens by bioassay-guided fractionation of the extract and identifi ed as armillarisin B. Armillarisin B eventually corresponds to 2-hydroxy-2- phenylpropanediamide and its structure was confi rmed on the basis of spectroscopic studies including 2D NMR experiments.

Antifungal activity in vitro of Aloe vera pulp and liquid fraction against plant pathogenic fungi

2005 ◽  
Vol 21 (1) ◽  
pp. 81-87 ◽  
Author(s):  
D. Jasso de Rodrı́guez ◽  
D. Hernández-Castillo ◽  
R. Rodrı́guez-Garcı́a ◽  
J.L. Angulo-Sánchez
Keyword(s):  
Antifungal Activity ◽  
Liquid Fraction ◽  
Aloe Vera ◽  
Pathogenic Fungi ◽  
Plant Pathogenic Fungi

Antifungal Activity of the Novel Fungicide Cyazofamid against Phytophthora infestans and Other Plant Pathogenic Fungi in Vitro

2001 ◽  
Vol 70 (2) ◽  
pp. 92-99 ◽  
Author(s):  
Shigeru Mitani ◽  
Satoshi Araki ◽  
Tomona Yamaguchi ◽  
Yasuko Takii ◽  
Takeshi Ohshima ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Phytophthora Infestans ◽  
Pathogenic Fungi ◽  
Plant Pathogenic Fungi ◽  
The Novel

scholarly journals Chemical Composition and Antifungal Activity of the Essential Oil of Cotinus coggygria from Marche Region (Italy)

2018 ◽  
Vol 13 (9) ◽  
pp. 1934578X1801300 ◽  
Author(s):  
Daniele Fraternale ◽  
Donata Ricci
Keyword(s):  
Antifungal Activity ◽  
Essential Oil ◽  
Pathogenic Fungi ◽  
Gas Chromatography Mass Spectrometry ◽  
Dilution Method ◽  
Agar Dilution Method ◽  
Plant Pathogenic Fungi ◽  
Cotinus Coggygria ◽  
In Vitro Antifungal Activity

The present study reports the results of gas chromatography-mass spectrometry (GC/MS) analyses of the essential oil from flowering aerial parts of Cotinus coggygria Scoop. (Anacardiaceae), as well as its in vitro antifungal activity against nine plant pathogenic fungi. Moreover, the essential oil was evaluated for its antifungal activity using the agar dilution method, and also MICs (minimum inhibitory concentrations) and MFCs (minimum fungicidal concentrations) were determined. The major compounds identified by GC-MS were limonene (49.2%), (Z)-β-ocimene (13.6%), α-pinene (8.8%) and (E)-β-ocimene (5.9%). The oil showed in vitro antifungal activity against some species of the Fusarium genus, Botrytis cinerea, and Alternaria solani. Our study indicates that the oil of C. coggygria could be used as a control agent for plant pathogenic fungi in natural formulations.

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