Genetics of Phytopathogenic Fungi. II. The Parasexual Cycle in Fusarium oxysporum F. pisi

1959 ◽  
Vol 121 (2) ◽  
pp. 74-80 ◽  
Author(s):  
R. W. Tuveson ◽  
E. D. Garber
Keyword(s):  
Fusarium Oxysporum ◽  
Phytopathogenic Fungi ◽  
Parasexual Cycle

GENETICS OF PHYTOPATHOGENIC FUNGI: VI. HETEROCARYONS INVOLVING GIBBERELLA FUJIKUROI AND FORMAE OF FUSARIUM OXYSPORUM

1961 ◽  
Vol 39 (4) ◽  
pp. 785-792 ◽  
Author(s):  
T. S. Dhillon ◽  
E. D. Garber ◽  
Ellen G. Wyttenbach
Keyword(s):  
Fusarium Oxysporum ◽  
Minimal Medium ◽  
Phytopathogenic Fungi ◽  
Potato Dextrose Agar ◽  
Gibberella Fujikuroi ◽  
Nutritional Requirement ◽  
Parasexual Cycle ◽  
Genus Fusarium ◽  
Component Strain ◽  
Mutant Strains

Heterocaryons involving nutritionally deficient mutant strains of Gibberella fujikuroi and mutant strains of this species and of four formae of Fusarium oxysporum were obtained. It was not possible to get heterocaryons of G. fujikuroi and F. oxysporum f. pisi until the latter mutant strain was adapted to grow on minimal medium. Spores from heterocaryons had either the genotype of only one component strain or of either component strain, depending on the heterocaryon. It was possible to alter nuclear ratios by growing certain heterocaryons on minimal medium supplemented with the compound(s) required by one or the other component strain. Sectors from certain heterocaryons grown on potato dextrose agar were homocaryotic for the nutritional requirement(s) of one component strain. Heterocaryosis as a taxonomic tool and the difficulties involved in demonstrating the parasexual cycle in the genus Fusarium are discussed.

scholarly journals Potential antifungal effects of silver nanoparticles (AgNPs) of different sizes against phytopathogenic Fusarium oxysporum f. sp. radicis-lycopersici (FORL) strains

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
Ilgin Akpinar ◽  
Muammer Unal ◽  
Taner Sar
Keyword(s):  
Silver Nanoparticles ◽  
Fusarium Oxysporum ◽  
Antifungal Agents ◽  
New Technology ◽  
Economic Loss ◽  
Phytopathogenic Fungi ◽  
Growth Media ◽  
Mycelium Growth ◽  
Antifungal Effects ◽  
Critical Problems

AbstractFusarium species are the primary fungal pathogen affecting agricultural foodstuffs both in crop yield and economic loss. Due to these problems, control of phytopathogenic fungi has become one of the critical problems around the World. Nanotechnology is a new technology with potential in many fields, including agriculture. This study focused on determining potential effects of silver nanoparticles (AgNPs) with different nanosizes (3, 5, 8 and 10 nm) and at different concentrations (12.5–100 ppm) against phytopathogenic Fusarium oxysporum f. sp. radicis-lycopersici (FORL) strains. The maximum antifungal activity was achieved by decreasing nanosize and increasing concentration of AgNPs. Mycelium growth abilities were decreased about 50%, 75% and 90% by AgNPs treatment with 3 nm sizes at 25 ppm, 37.5 ppm and 50 ppm concentrations, respectively. The productivity of fungal biomass in the liquid growth media was found to be too limited at the 25–37.5 ppm of AgNPs concentrations with all sizes. In addition, both septation number and dimensions of micro- and macroconidia were found to be gradually decreased with the application of silver nanoparticles. This work showed that the low concentration of AgNPs could be used as potential antifungal agents and applied for control of phytopathogens.

Antifungal Activities of Some Indole Derivatives

2010 ◽  
Vol 65 (7-8) ◽  
pp. 437-439 ◽  
Author(s):  
Hui Xu ◽  
Qin Wang ◽  
Wen-Bin Yang
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Graminearum ◽  
Broad Spectrum ◽  
Alternaria Alternata ◽  
Phytopathogenic Fungi ◽  
Pyricularia Oryzae ◽  
Indole Derivatives ◽  
Alternaria Brassicae ◽  
Antifungal Activities

Nine indole derivatives were evaluated in vitro against Fusarium graminearum, Alternaria alternata, Helminthosporium sorokinianum, Pyricularia oryzae, Fusarium oxysporum f. sp. vasinfectum, Fusarium oxysporum f. sp. cucumarinum, and Alternaria brassicae. Most of the compounds were found to possess antifungal activities. Especially compounds 2, 5, 8, and 9 exhibited broad-spectrum antifungal activities against the above-mentioned seven phytopathogenic fungi, and showed more potent activities than hymexazole, a commercial agricultural fungicide.

Synthesis and Antifungal Activities of Some 2,6-Bis-(Un)Substituted Phenoxymethylpyridines

2010 ◽  
Vol 65 (7-8) ◽  
pp. 433-436
Author(s):  
Hui Xu ◽  
Huan Qu
Keyword(s):  
Antifungal Activity ◽  
Fusarium Oxysporum ◽  
Fusarium Graminearum ◽  
Broad Spectrum ◽  
Alternaria Alternata ◽  
Phytopathogenic Fungi ◽  
Alternaria Brassicae ◽  
Antifungal Activities

Several 2,6-bis-(un)substituted phenoxymethylpyridines were synthesized and evaluated in vitro against Fusarium graminearum, Helminthosporium sorokinianum, Alternaria brassicae, Alternaria alternata, and Fusarium oxysporum f. sp. vasinfectum. Among all derivatives, compound 3 a exhibited a broad-spectrum antifungal activity against the five phytopathogenic fungi.

scholarly journals Phytopathogenic Fungal Inhibitors from Celery Seeds

2012 ◽  
Vol 7 (7) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Tao Liu ◽  
Fu-Guang Liu ◽  
Hui-Qin Xie ◽  
Qing Mu
Keyword(s):  
Rhizoctonia Solani ◽  
Fusarium Oxysporum ◽  
Propionic Acid ◽  
Alternaria Alternata ◽  
Chromatographic Separation ◽  
Phytopathogenic Fungi ◽  
Light Petroleum ◽  
Apium Graveolens ◽  
Active Fraction ◽  
Celery Seeds

Extract of celery ( Apium graveolens L.) seeds was investigated against phytopathogenic fungi. The light petroleum extract showed promising inhibition activities in the tests against Rhizoctonia solani and Fusarium oxysporum f. sp. vasinfecum. Chromatographic separation of the extract gave 19 fractions, one of which, QCZ-4, possessed significant inhibitory rates of 64.6%, 88.4% and 54.7% at a concentration of 100 ppm against R. solani, F. oxysporium f. sp. vasinfecum and Alternaria alternata, respectively. Major components in the active fraction were identified by GC-MS as p-(2-aminoethyl)phenol (39.7%), 3-(3,4-dimethybenzoyl) propionic acid (32.6%) and p-heptylphenol (26.9%).

scholarly journals Salmea scandens (Asteraceae) extracts inhibit the growth of Fusarium oxysporum and Alternaria solani pathogens of tomato

2021 ◽  
Vol 53 (1) ◽  
pp. 262-273
Author(s):  
Miguel Angel Salas Marina ◽  
Gladys del Carmen Hernández Eleria ◽  
Vidal Hernández García ◽  
Claudio Ríos Velasco ◽  
María Fernanda Ruiz Cisneros ◽  
...  
Keyword(s):  
Fusarium Oxysporum ◽  
Functional Groups ◽  
Chemical Constituents ◽  
Tomato Fruit ◽  
Preventive Treatment ◽  
Alternaria Solani ◽  
Phytopathogenic Fungi ◽  
The Fourier Transform ◽  
Mass Volume ◽  
Acetone Extracts

Tomatoes are affected by fungi of the genera Fusarium and Alternaria, reducing the quantity and quality of the fruit.Since plant extracts are an alternative for the control of phytopathogenic fungi, the antifungal effect of Salmea scandens extracts was evaluated against Fusarium oxysporum and Alternaria solani and the functional groups of the chemical constituents were identified.The aqueous extracts were obtained by three techniques (soxhlet, assisted ultrasound and maceration) and three solvents (water, acetone and ethyl ether), these were evaluated against F. oxysporum in poisoned medium and A. solani in tomato fruit. The functional groups were identified by the Fourier Transform Infrared Spectroscopy (FTIR) technique. The best extraction technique for S. scandenswas soxhlet with all three solvents. Maceration-acetone extracts at concentrations of 4000 and 5000 ppm showed increased antifungal activity against F. oxysporum and A. solani. The FTIR analysis confirmed the presence of carboxylic acids, aldehydes, ketones and aromatic compounds as the possible responsible for the antifungal activity.S. scandensextracts have a high potential to be used as a preventive treatment in the control of F. oxysporum and A. solani. Highlights The highest mass/volume extraction efficiency yield was with the soxhlet technique using water as a solvent. Extracts obtained by maceration-acetone technique, caused the strongest Fusarium oxysporum inhibition. The maceration-acetone extract at 5000 ppm, showed higher inhibition of A. solani mycelial growth than the commercial fungicide Hymexazol.

TAXONOMIC COMPOSITION OF FUNGI COMMUNITIES IN THE RHIZOSPHERE OF FABA BEANS

2021 ◽  
Vol 22 (4) ◽  
pp. 96-101
Author(s):  
Yu.N. Kurkina ◽  
Keyword(s):  
Species Diversity ◽  
Fusarium Oxysporum ◽  
Black Soil ◽  
Phytopathogenic Fungi ◽  
Taxonomic Composition ◽  
Control Soil ◽  
Microscopic Fungi ◽  
Faba Beans ◽  
Small Plot

The taxonomic composition of rhizosphere complexes of microscopic fungi was determined under nine varieties of faba beans grown in small-plot experiments on black soil with a pH of 7.6, ob-serving zonal agricultural techniques (Belgorod, Russia). It was revealed that under different vari-eties of faba beans the list of micromycete species is not the same, but their number is lower than in control soil. The number of micromycete propagules in the rhizosphere of beans (34 ± 1.7 thou-sand CFU / g soil) is on average 2 times higher than in the control soil (17 ± 1.2 thousand CFU / g soil). The greatest species diversity was found in the varieties Velena and Akvadul (18 and 16 species, respectively). The mycocomplexes of the Tsarskiy Yield and Leader varieties were dis-tinguished by the greatest similarity with the control. Phytopathogenic fungi Fusarium oxysporum dominated in the rhizosphere complexes of all studied varieties of vegetable beans, and the spe-cies A. fabaе, C. herbarum, and U. botrytis were present only in the rank of random species in my-cocomplexes under some varieties.

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