scholarly journals Ação do fungo predador de nematóides Arthrobotrys conoides sobre larvas infectantes de Cooperia punctata

2002 ◽  
Vol 9 (1) ◽  
pp. 5-7
Author(s):  
Jackson Victor de Araújo ◽  
Marcos Pezzi Guimarães
Keyword(s):  
Arthrobotrys Conoides

Influence of soil microorganisms on the trapping of nematodes by nematophagous fungi

1984 ◽  
Vol 30 (12) ◽  
pp. 1437-1439 ◽  
Author(s):  
W. D. Rosenzweig ◽  
D. Ackroyd
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Cell Wall ◽  
Yeast Cell ◽  
Soil Microorganisms ◽  
Nematophagous Fungi ◽  
Yeast Cell Wall ◽  
Soil Organisms ◽  
Yeast Saccharomyces Cerevisiae ◽  
Arthrobotrys Conoides

The influence of 29 species of soil organisms (21 bacteria and 8 fungi) on nematode capture by 3 species of nematophagous fungi was investigated. Only the yeast, Saccharomyces cerevisiae, was found to bind to lectin-containing traps of Arthrobotrys conoides and Monacrosporium rutgeriensis and prevent nematode capture. None of the organisms studied bound to the traps of Monacrosporium eudermatum. The trap lectin of Arthrobotrys conoides, being specific for glucose – mannose, apparently binds to the mannan component of the yeast cell wall. At this time, it is not clear why the yeast binds to traps of Monacrosporium rutgeriensis since the trap lectin is highly specific for 2-deoxyglucose, a saccharide that does not appear to occur in nature.

Secondary metabolites with nematicidal and antimicrobial activity from nematophagous fungi and Ascomycetes

1995 ◽  
Vol 73 (S1) ◽  
pp. 932-939 ◽  
Author(s):  
H. Anke ◽  
M. Stadler ◽  
A. Mayer ◽  
O. Sterner
Keyword(s):  
Linoleic Acid ◽  
Secondary Metabolites ◽  
Biosynthetic Pathway ◽  
Nematophagous Fungi ◽  
Submerged Cultures ◽  
Daldinia Concentrica ◽  
Antimicrobial Metabolites ◽  
Natural Nematicides ◽  
Arthrobotrys Conoides ◽  
New Metabolites

Screening of nematode-trapping fungi for antimicrobial and nematicidal activities gave three new antimicrobial metabolites from cultures of five Arthrobotrys strains. The compounds exhibited no nematicidal activities towards Caenorhabditis elegans and Meloidogyne incognita. From trap-forming submerged cultures of Arthrobotrys conoides, linoleic acid was isolated as a nematicidal principle. Its production increased with the number of traps formed in both Arthrobotrys oligospora and Arthrobotrys conoides. Nematoctonus robustus and Nematoctonus concurrens produced pleurotin, dihydropleurotinic acid, and leucopleurotin, metabolites previously isolated from cultures of Hohenbuehelia species, suggesting that the same biosynthetic pathways function in both the teleomorph and anamorph. Several strains of Ascomycetes had nematicidal activities; linoleic acid was responsible for the activity in cultures of a Chlorosplenium species, 14-epicochlioquinone B in cultures of Neobulgaria pura, and two naphthalenes derived from the melanin biosynthetic pathway in Daldinia concentrica. 5-Pentyl-2-furaldehyde, previously known as a metabolite from a Basidiomycete, was produced by an unidentified Australian Ascomycete. More than 30 mostly new metabolites have been isolated from cultures of Lachnum papyraceum, many being chlorinated. Under different conditions the fungus incorporated bromine instead of chlorine. Key words: nematophagous fungi, natural nematicides, linoleic acid, chlorinated secondary metabolites.

The effect of carbon source on trap formation by Arthrobotrys conoides

1968 ◽  
Vol 14 (11) ◽  
pp. 1260-1261
Author(s):  
A. W. James ◽  
R. J. Nowakowski
Keyword(s):  
Amino Acids ◽  
Carbon Source ◽  
Sole Carbon Source ◽  
Major Effect ◽  
Trap Formation ◽  
Arthrobotrys Conoides

The nematode-trapping fungus Arthrobotrys conoides grows as typical vegetative hyphae on laboratory media containing glucose or starch as sole carbon source. However, in the presence of nematodes, "nemin", and several of the aliphatic amino acids (such as valine), this predacious fungus forms traps which are composed of sticky loops. The present studies show that, when A. conoides is grown on a semisynthetic medium in which various carbohydrates are substituted for glucose as the carbon source available for growth, the nature of the carbohydrate exerts a major effect on the induction of trap formation.

scholarly journals Effect of spraying Arthrobotrys conoides conidia on pastures to control nematode infection in sheep

2015 ◽  
Vol 36 (1) ◽  
pp. 239 ◽  
Author(s):  
Margarete Kimie Falbo ◽  
Vanete Thomaz Soccol ◽  
Itacir Eloi Sandini ◽  
Jaqueline Huzar Novakowiski ◽  
Carlos Ricardo Soccol
Keyword(s):  
Nematode Infection ◽  
Arthrobotrys Conoides

Antagonistic effect of predacious Arthrobotrys fungi on infective Haemonchus placei larvae

1993 ◽  
Vol 67 (2) ◽  
pp. 136-138 ◽  
Author(s):  
J. V. Araújo ◽  
M. A. Santos ◽  
S. Ferraz ◽  
A. S. Maia
Keyword(s):  
Laboratory Experiments ◽  
Antagonistic Effect ◽  
Fungus Species ◽  
Infective Larvae ◽  
Group 3 ◽  
Group 2 ◽  
Predatory Capacity ◽  
Arthrobotrys Conoides ◽  
Haemonchus Placei ◽  
Group 1

AbstractLaboratory experiments were performed to investigate the ability of isolates from the predacious fungus species Arthrobotrys conoides (one isolate) and A. robusta (four isolates) to trap and kill infective Haemonchus placei larvae. Three groups for each isolate were formed: group 1, fungi and infective larvae; group 2, fungi; group 3, infective larvae. There were statistically significant differences (P<0.05) between the antagonistic effects of three isolates of A. robusta, but there was no such difference between the isolate of A. conoides and isolates of A. robusta. This result indicates that there can be a variation in the predatory capacity of different isolates within a single fungus species. After 20 days of assay, there was greater recuperation of infective H. placei larvae in group 3 compared to group 1.

scholarly journals Carbon Dioxide-dependent Morphogenesis in Arthrobotrys conoides

Nature ◽  
1964 ◽  
Vol 204 (4960) ◽  
pp. 804-804 ◽  
Author(s):  
S. BARTNICKI-GARCIA ◽  
JACOB EREN ◽  
DAVID PRAMER
Keyword(s):  
Carbon Dioxide ◽  
Arthrobotrys Conoides

scholarly journals Efeitos da temperatura sobre a atividade de fungos no controle biológico de Meloidogyne javanica E M. incognita raça 3

2003 ◽  
Vol 27 (1) ◽  
pp. 91-97 ◽  
Author(s):  
Fábio R. Alves ◽  
Vicente Paulo Campos
Keyword(s):  
Meloidogyne Javanica ◽  
Paecilomyces Lilacinus ◽  
Duddingtonia Flagrans ◽  
Paecilomyces Variotii ◽  
Meloidogyne Spp ◽  
Arthrobotrys Conoides

O efeito de Arthrobotrys conoides, Duddingtonia flagrans, Paecilomyces lilacinus, Paecilomyces variotii, Monacrosporium doedycoides e um isolado de rizobactéria na reprodução e crescimento populacional de Meloidogyne javanica e M. incognita raça 3 em tomateiro Santa Clara, suscetível à Meloidogyne spp., foi estudado em três ambientes distintos: 1) casa-de-vegetação sem controle de temperatura; 2) sala climatizada com temperatura do ar constante a 24ºC; 3) em banho-maria com temperatura do solo mantida em 29-30ºC, colocado na mesma sala climatizada caracterizada anteriormente. Maior crescimento populacional de M. javanica e de M. incognita raça 3 ocorreu em solo aquecido, comparado com aquela em casa-de-vegetação e sala climatizada, e o número de galhas causado por M. javanica e M. incognita raça 3 foi maior em solo aquecido e em sala climatizada do que em casa-de-vegetação. Em solo aquecido e em sala climatizada, A. conoides e a rizobactéria reduziram (P< 0,05) o número de galhas de M. incognita raça 3, comparado com a testemunha. Em solo aquecido, A. conoides reduziu o número de ovos de M. incognita raça 3, comparado com a testemunha. Em casa-de-vegetação, todos os antagonistas reduziram o número de ovos de M. incognita raça 3, comparado com a testemunha. Em casa-de-vegetação, todos os antagonistas reduziram o número de ovos em relação à testemunha.

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