Egg Parasitism by Zoosporic Fungi in a Littoral Chironomid Community

1991 ◽  
Vol 10 (4) ◽  
pp. 455-462 ◽  
Author(s):  
W. Wallace Martin
Keyword(s):  
Zoosporic Fungi ◽  
Egg Parasitism ◽  
Chironomid Community

Distribuição geográfica de Aphanodictyon papillatum Huneycutt ex Dick (Saprolegniales) no Brasil. Geographical distribution of the Aphanodictyon papillatum Huneycutt ex Dick (Saprolegniales) in the Brazil

2010 ◽  
Vol 35 ◽  
pp. 171-176 ◽  
Author(s):  
José de Ribamar De Sousa Rocha ◽  
Edílson Páscoa Rodrigues ◽  
Hamanda Soares Viana Pereira da Silva ◽  
Lidiane Martins Alves de Sousa ◽  
Brenda Skally Viera Barros
Keyword(s):  
Key Words ◽  
Geographical Distribution ◽  
Zoosporic Fungi

Geographical distribution of the Aphanodictyon papillatum Huneycutt ex Dick (Saprolegniales) in the Brazil. Palavras-chave. Aphanodictyon papillatum, Brasil, fungo zoospórico. Key words. Aphanodictyon papillatum, Brazil, zoosporic fungi.

scholarly journals Evidence that a New Antibiotic Flavone Glycoside Chemically Defends the Sea Grass Thalassia testudinumagainst Zoosporic Fungi

1998 ◽  
Vol 64 (4) ◽  
pp. 1490-1496 ◽  
Author(s):  
P. R. Jensen ◽  
K. M. Jenkins ◽  
D. Porter ◽  
W. Fenical
Keyword(s):  
Chemical Characterization ◽  
Leaf Tissue ◽  
Chemical Fractionation ◽  
Tissue Concentrations ◽  
Flavone Glycoside ◽  
Sea Grass ◽  
Zoosporic Fungi ◽  
Leaf Tissues ◽  
Marine Angiosperm

ABSTRACT Significantly fewer thraustochytrid protists (zoosporic fungi) were observed in association with healthy leaf tissue of the marine angiosperm Thalassia testudinum than in association with sterilized samples that were returned to the collection site for 48 h. In support of the hypothesis that sea grass secondary metabolites were responsible for these differences, extracts of healthyT. testudinum leaf tissues inhibited the growth of the co-occurring thraustochytrid Schizochytrium aggregatum and deterred the attachment of S. aggregatum motile zoospores to an extract-impregnated substrate. By using S. aggregatumfor bioassay-guided chemical fractionation, a new flavone glycoside was isolated and structurally characterized as luteolin 7-O-β-d-glucopyranosyl-2"-sulfate. Whole-leaf tissue concentrations of this metabolite (4 mg/ml of wet leaf tissue) inhibited S. aggregatum attachment, and a significantly lower concentration (270 μg/ml) reduced thraustochytrid growth by 50%, suggesting that natural concentrations are at least 15 times greater than that needed for significant microbiological effects. These results offer the first complete chemical characterization of a sea grass sulfated flavone glycoside and provide evidence that a secondary metabolite chemically defends T. testudinum against fouling microorganisms.

Redhead Egg Parasitism of Canvasback Nests

1983 ◽  
Vol 47 (1) ◽  
pp. 213 ◽  
Author(s):  
Stephen H. Bouffard
Keyword(s):  
Egg Parasitism

Taxonomic and ecologic observations of zoosporic fungi in soils of a high-arctic ecosystem

1976 ◽  
Vol 54 (5-6) ◽  
pp. 533-538 ◽  
Author(s):  
Tom Booth ◽  
Paul Barrett
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Soil Acidity ◽  
High Arctic ◽  
Arctic Ecosystem ◽  
Devon Island ◽  
Zoosporic Fungi

Phylctochytrium arcticum Barr and Rhizophlyctis harderi Uebelmesser are reported as additional taxa in soils of Truelove Lowland (Devon Island, N.W.T.) and Nowakowskiella spp., Olpidium pendulum Zopf, Pythium irregularae Buisman. Pythium spp., Phlyctochytrium arcticum, and Rhizophydium sphaerotheca Zopf are readily detectable as active organisms in Lowland microhabitats. Species diversity is greatest in mesic and warm soils and species composition of water-logged soils is different than dry soils. Soil acidity effects on distribution are discussed and autecological considerations of Nowakowskiella elegans and R. sphaerotheca with respect to pH, percentage N, C, and P, milliequivalents Ca2+ and Mg2+, moisture, and temperature are presented.

scholarly journals The genus Allomyces (Blastocladiomycota) in the State of Piauí, Brazil

Hoehnea ◽  
2016 ◽  
Vol 43 (3) ◽  
pp. 487-495
Author(s):  
José de Ribamar de Sousa Rocha ◽  
Laércio de Sousa Saraiva ◽  
Janete Barros da Silva ◽  
Maria do Amparo de Moura Macêdo
Keyword(s):  
Geographical Distribution ◽  
Soil Samples ◽  
The State ◽  
Agricultural Expansion ◽  
Zoosporic Fungi ◽  
Identification Procedures

ABSTRACT Brazilian ecosystems have been intensively exploited for agricultural expansion, however, the diversity of zoosporic organisms in such biomes remains little known. Therefore, further research is required to better understand their role within these ecosystems. Studies with zoosporic fungi were carried out and 22 Allomyces isolates were obtained from soil samples collected at six municipalities from Piauí State. After identification procedures, the taxa were grouped into four species: A. anomalus R. Emers., A. arbusculus E.J. Butler, A. moniliformis Coker & Braxton, and A. neomoniliformis Indoh. A. arbusculus had the highest rate of resistant sporangia viability (10%) and the largest geographical distribution in Piauí, occurring in seven out of ten sites studied. Countrywide, they occur within 14 municipalities from three states. Greater knowledge about the geographical distribution of Allomyces in Brazil is being pioneered in the State of Piauí. Novel information regarding the diversity and occurrence, as well as taxonomic characteristics of the isolates is presented herein.

scholarly journals Zoosporic fungi growing on the eggs of Coregonus lavaretus maraena (Bloch, 1779) from Lake Miedwie in Pomerania

2001 ◽  
Vol 31 (1) ◽  
pp. 141-149
Author(s):  
Bazyli Czeczuga ◽  
Marek Pietrucha ◽  
Elżbieta Muszyńska
Keyword(s):  
Coregonus Lavaretus ◽  
Zoosporic Fungi
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