Nature of Growth-promoting Activity associated with the Culture Filtrates of Fusarium oxysporum f. lycopersici (Sacc.) Snyd. and Hans.

Nature ◽  
1964 ◽  
Vol 203 (4945) ◽  
pp. 665-666
Author(s):  
A. MAHADEVAN ◽  
N. E. CAROSELLI
Keyword(s):  
Fusarium Oxysporum ◽  
Culture Filtrates ◽  
Growth Promoting

Effect of Buffers on the Pectolytic Activity of Culture Filtrates of Fusarium oxysporum

Nature ◽  
1964 ◽  
Vol 202 (4930) ◽  
pp. 414-415 ◽  
Author(s):  
J. A. MEYER ◽  
E. D. GARBER ◽  
SUSAN G. SHAEFFER
Keyword(s):  
Fusarium Oxysporum ◽  
Culture Filtrates ◽  
Pectolytic Activity

In vitro phytotoxicity of culture filtrates of Fusarium oxysporum f. sp. vanillae in Vanilla planifolia Jacks

2015 ◽  
Vol 197 ◽  
pp. 573-578 ◽  
Author(s):  
Marco Antonio Ramírez-Mosqueda ◽  
Lourdes Georgina Iglesias-Andreu ◽  
Mauricio Luna-Rodríguez ◽  
Alejandro Antonio Castro-Luna
Keyword(s):  
Fusarium Oxysporum ◽  
Vanilla Planifolia ◽  
Culture Filtrates

scholarly journals Plant growth promoting bacteria with potential biocontrol agent of Fusarium oxysporum f. sp. Lycopersici , and Moniliophthora roreri

2019 ◽  
Vol 10 (3) ◽  
pp. 393-402
Author(s):  
Jefferson Guato-Molina ◽  
Javier Auhing-Arcos ◽  
Jorge Crespo-Ávila ◽  
Gabriel Esmeraldas-García ◽  
Antonio Mendoza-León ◽  
...  
Keyword(s):  
Plant Growth ◽  
Fusarium Oxysporum ◽  
Biocontrol Agent ◽  
Plant Growth Promoting Bacteria ◽  
Potential Biocontrol Agent ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Moniliophthora Roreri

scholarly journals The biological activity of subspecies Trichoderma harzianum against Fusarium oxysporum, the causative agent of fusarium wilt cucumber in vitro

2020 ◽  
Vol 21 ◽  
pp. 00021
Author(s):  
Ninel Pavlovskaya ◽  
Irina Gneusheva ◽  
Irina Solokhina ◽  
Natalya Ageeva
Keyword(s):  
Biological Activity ◽  
Fusarium Oxysporum ◽  
Trichoderma Harzianum ◽  
Pathogenic Fungi ◽  
Chitinase Activity ◽  
Lytic Enzymes ◽  
Growth Promoting ◽  
Phytopathogenic Microorganisms ◽  
Trichoderma Lixii

The study of the effect of the strains of the fungus Trichoderma: Trichoderma atrobrunneum VKPM F-1434, Trichoderma harzianum 5/14, Trichoderma Lixii T4/14 on the number of micromycetes populations of the pathogenic fungi Fusarium oxysporum isolate B/14, Fusarium oxysporum isolate MOS509, Fysarium oxysporum isolate IMI58289 in vitro. It was found that the Trichoderma atrobrunneum fungus strain VKPM F-1434 showed the highest degree of inhibition on 10 days of cultivation with phytopathogenic microorganisms, which was 100 %. The study revealed that all Trichoderma species are capable of producing lytic enzymes. Trichoderma atrobrunneum strain VKPM F-1434 exhibits strong lipase and chitinase activity and average proteinase activity. In addition, Trichoderma atrobrunneum strain VKPM F-1434 has a growth-promoting ability, which was reflected in the germination of seeds of cucumber “German F1”. The maximum values of indicators of germination energy were noted – 98.4 % and germination – 100 %.

scholarly journals Isolation and Characterization of Plant Growth-Promoting Endophytic Bacteria Paenibacillus polymyxa SK1 from Lilium lancifolium

2020 ◽  
Vol 2020 ◽  
pp. 1-17 ◽  
Author(s):  
Mohammad Sayyar Khan ◽  
Junlian Gao ◽  
Xuqing Chen ◽  
Mingfang Zhang ◽  
Fengping Yang ◽  
...  
Keyword(s):  
Plant Growth ◽  
Fusarium Oxysporum ◽  
Botrytis Cinerea ◽  
Paenibacillus Polymyxa ◽  
Fusarium Fujikuroi ◽  
Botryosphaeria Dothidea ◽  
Isolation And Characterization ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Lilium Lancifolium

Paenibacillus polymyxa is a plant growth-promoting rhizobacterium that has immense potential to be used as an environmentally friendly replacement of chemical fertilizers and pesticides. In the present study, Paenibacillus polymyxa SK1 was isolated from bulbs of Lilium lancifolium. The isolated endophytic strain showed antifungal activities against important plant pathogens like Botryosphaeria dothidea, Fusarium oxysporum, Botrytis cinerea, and Fusarium fujikuroi. The highest percentage of growth inhibition, i.e., 66.67 ± 2.23%, was observed for SK1 against Botryosphaeria dothidea followed by 61.19 ± 3.12%, 60.71 ± 3.53%, and 55.54 ± 2.89% against Botrytis cinerea, Fusarium fujikuroi, and Fusarium oxysporum, respectively. The metabolite profiling of ethyl acetate fraction was assessed through the UHPLC-LTQ-IT-MS/MS analysis, and putative identification was done with the aid of the GNPS molecular networking workflow. A total of 29 compounds were putatively identified which included dipeptides, tripeptides, cyclopeptides (cyclo-(Leu-Leu), cyclo(Pro-Phe)), 2-heptyl-3-hydroxy 4-quinolone, 6-oxocativic acid, anhydrobrazilic acid, 1-(5-methoxy-1H-indol-3-yl)-2-piperidin-1-ylethane-1,2-dione, octadecenoic acid, pyochelin, 15-hydroxy-5Z,8Z,11Z, 13E-eicosatetraenoic acid, (Z)-7-[(2R,3S)-3-[(2Z,5E)-Undeca-2,5-dienyl]oxiran-2-yl]hept-5-enoic acid, arginylasparagine, cholic acid, sphinganine, elaidic acid, gossypin, L-carnosine, tetrodotoxin, and ursodiol. The high antifungal activity of SK1 might be attributed to the presence of these bioactive compounds. The isolated strain SK1 showed plant growth-promoting traits such as the production of organic acids, ACC deaminase, indole-3-acetic acid (IAA), siderophores, nitrogen fixation, and phosphate solubilization. IAA production was strongly correlated with the application of exogenous tryptophan concentrations in the medium. Furthermore, inoculation of SK1 enhanced plant growth of two Lilium varieties, Tresor and White Heaven, under greenhouse condition. In the light of these findings, the P. polymyxa SK1 may be utilized as a source of plant growth promotion and disease control in sustainable agriculture.

The 24-kDa protein from Fusarium oxysporum f.sp. erythroxyli: occurrence in related fungi and the effect of growth medium on its production

1997 ◽  
Vol 43 (1) ◽  
pp. 45-55 ◽  
Author(s):  
Bryan A. Bailey ◽  
James C. Jennings ◽  
James D. Anderson
Keyword(s):  
Fusarium Oxysporum ◽  
Protein Production ◽  
Fusarium Species ◽  
Infected Plant ◽  
Water Soluble ◽  
Western Blots ◽  
Fungal Isolates ◽  
Culture Filtrates ◽  
Dicotyledonous Plants ◽  
Casamino Acids

A 24-kDa protein that elicits ethylene production and necrosis in leaves of dicotyledonous plants was previously purified from culture filtrates of Fusarium oxysporum Schlechtend:Fr. f.sp. erythroxyli. Antisera to the denatured 24-kDa protein detected 2.5 ng of the 24-kDa protein on Western blots at 100 000-fold dilutions. The antisera cross-reacted with a 24-kDa protein on Western blots of culture filtrates from three other F. oxysporum formae speciales. Of seven Fusarium species, only F. oxysporum, F. acuminatum Ellis and Kellerm., and F. avenaceum (Fr.:Fr.) Sacc. isolates produced an antigenically related 24-kDa protein. Although there were differences in the profiles of proteins extracted from stems of coca (Erythroxylum coca var. coca L. Lam.) infected with F. oxysporum f.sp. erythroxyli compared with uninfected stems, antisera to the 24-kDa protein did not cross-react with any proteins from the infected coca stems. For the fungal isolates studied, the best medium tested for production of the 24-kDa protein contained 1% sucrose and 1% asparagine. Biological activity of the F. oxysporum culture filtrates on sweet basil leaves was consistently correlated with the presence of the 24-kDa protein. Production of the 24-kDa protein was limited in cultures containing pectin or cellulose as the primary carbon source, or in cultures lacking sucrose or casamino acids. Water-soluble extracts from coca stems inhibited production of the 24-kDa protein, whereas cellulose and pectin did not. Components produced by the plant may limit production of the 24-kDa protein in infected plant tissue and thereby limit the response of the plant to the fungus. These results suggest the 24-kDa protein does not function in the symptomatic phase of the F. oxysporum f.sp. erythroxyli–coca disease interaction.Key words: Fusarium oxysporum, toxin, elicitor.

In vitro antagonism of endophytic Fusarium oxysporum isolates against the burrowing nematode Radopholus similis

Nematology ◽  
2006 ◽  
Vol 8 (4) ◽  
pp. 627-636 ◽  
Author(s):  
Bjoern Niere ◽  
Shahasi Athman ◽  
Altus Viljoen ◽  
Clifford Gold ◽  
Thomas Dubois ◽  
...  
Keyword(s):  
Fusarium Oxysporum ◽  
Mortality Rates ◽  
Antagonistic Activity ◽  
Radopholus Similis ◽  
Biological Control Agents ◽  
Inhibitory Effects ◽  
Culture Filtrates ◽  
Burrowing Nematode ◽  
Nematode Mortality

AbstractRadopholus similis is one of the key pests of banana worldwide. In this study, nine endophytic Fusarium oxysporum isolates were screened for the production of secondary metabolites antagonistic to R. similis in culture. Undiluted and diluted culture filtrates were tested against motile stages and eggs of R. similis. All isolates tested demonstrated in vitro antagonistic activity, causing paralysis of R. similis motile stages. The percentage of paralysed nematodes increased with increase in the length of exposure time to culture filtrates. After 24 h exposure in culture filtrates up to 100% of the treated nematodes were paralysed compared to 26.5% in the control treatments. Nematode mortality rates after 24 h exposure in culture filtrates ranged from 76.4% to 100%. Paralysis was reversible at lower filtrate concentrations. Radopholus similis males were more sensitive to culture filtrates than females. Culture filtrates of all isolates demonstrated inhibitory effects on hatching of R. similis eggs. The results demonstrate the potential for using endophytic F. oxysporum as biological control agents against R. similis and for toxic derivatives from their secondary metabolism to be used as potential nematicides.

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