Fungal-feeding habits of six nematode isolates in the genus Filenchus

Okada, Hiroaki; Harada, H.; Kadota, Ikuo

doi:10.1016/j.soilbio.2004.11.010

Cited by 135 publications

(69 citation statements)

References 18 publications

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“…The diversity of soil nematodes in succession increased but simultaneously with increase in populations of Tylenchidae with c-p 2, which decreased the values of PPI. At least some Filenchus species (such as F. misellus and F. discrepans) are fungivorous and their high population densities can affect the results of nematode community analyses (Okada et al 2005). PPI/MI ratio was lower or equal to 1, which according to Bongers et al (1997) indicates natural habitats, where plants make optimal use of nutrient resources or only slight nutrient disturbances.…”

Section: Discussionmentioning

confidence: 99%

Diversity of soil nematodes in meadows of the White Carpathians

Háněl

Čerevková

2006

Helminthologia

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Soil nematodes were studied in 11 meadow sites in the White Carpathians. In total, 155 species and 86 genera were found but the composition of nematode assemblages in eastern and western side of the mountains differed. Most nematode species belonged to the orders Tylenchida (52), Dorylaimida (35) and Rhabditida (16), and to the trophic groups bacterivores (47), plant parasites (29) and omnivores (25). In individual sites and sampling dates the number of species varied in range 18 -68, genera 18 -52, H'spp 1.32 -3.50, H'gen 1.31 -3.21, T 1.79 -5.70, MI 2.32 -3.63, PPI 2.03 -2.98, and ΣMI 2.20 -3.50. Composition of nematode assemblages and their matrix classification indicated a low degree of anthropogenous disturbance to the meadows.

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Section: Discussionmentioning

confidence: 99%

Diversity of soil nematodes in meadows of the White Carpathians

Háněl

Čerevková

2006

Helminthologia

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“…The two nematode species were from our laboratory stock cultures (Okada and Kadota, 2003). To measure nematode propagation, fungal colonies were prepared in Petri-dishes as described in Okada et al (2005). Filenchus misellus and Aa were maintained on R19 colonies on PDA to be used as inocula before experiments.…”

Section: Methodsmentioning

confidence: 99%

“…The dishes were incubated at 25 in the dark for 40 days for nematode propagation. The nematodes were then extracted from each dish by the Baermann funnel method (Okada et al, 2005) and counted. The experiment was conducted twice: first from May 29th to July 8th and second from Sept. 25th to Nov. 4th, 2002.…”

Section: Methodsmentioning

confidence: 99%

“…We have reported that some nematode species of the genus Filenchus, a common group of the family Tylenchidae, have a potential to feed on fungi including Rs (Okada et al, 2002;Okada and Kadota, 2003;Okada et al, 2005). This is an important finding for the ecological study of soil nematodes (Ferris and Bongers, 2009) and for biocontrol of soil-borne phytoparasitic fungi.…”

mentioning

confidence: 94%

“…Owing to these properties, we can obtain nematodes without the need for sterile treatment using harmful chemicals, if we use an appropriate filter paper to extract nematodes from a monoxenic culture (Chen and Ferris, 1999;Okada et al, 2005).…”

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confidence: 99%

See 2 more Smart Citations

Propagation of Aphelenchus avenae Bastian (Aphelenchidae) and Filenchus misellus Andrassy (Tylenchidae) on seven fungal isolates or Rhizoctonia solani as food source

浩明¹,

啓基²,

真奈³

2010

Japanese Journal of Nematology

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Fungi and Macroaggregation in Deep-Sea Sediments

Damare

Raghukumar

2007

Microb Ecol

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Whereas fungi in terrestrial soils have been well studied, little is known of them in deep-sea sediments. Recent studies have demonstrated the presence of fungal hyphae in such sediments but in low abundance. We present evidence in this study that one of the apparent reasons for the poor detection of fungi in deep-sea sediments is their cryptic presence in macroaggregates. Fungal biomass carbon from different core sections of deep-sea sediments from approximately 5000 m depth in the Central Indian Ocean was estimated based on direct microscopic detection of fungal mycelia. Treatment of sediment samples with ethylenediamine tetra-acetic acid (EDTA) enabled more frequent detection and significantly higher biomass than in samples without such treatment. Treatment with EDTA resulted in detecting various stages of breakdown of aggregates in the sediments, gradually revealing the presence of fungal hyphae within them. Experimental studies of a deep-sea, as well as three terrestrial isolates of fungi, showed that all could grow at 200 bar and 5 degrees C in a nutrient medium and in deep-sea sediment extract. Hyphae of fungi grown in sediment extract under the above conditions showed various stages of accretion of particles around them, leading to the formation of aggregates. Such aggregates showed the presence of humic material, carbohydrate, and proteins. We suggest that fungi in deep-sea sediments may be involved in humic aggregate formation by processes very similar to those in terrestrial sediments. The importance of such a process in carbon sequestration and food web in the deep sea needs to be examined.

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Fungal-feeding habits of six nematode isolates in the genus Filenchus

Cited by 135 publications

References 18 publications

Diversity of soil nematodes in meadows of the White Carpathians

Diversity of soil nematodes in meadows of the White Carpathians

Propagation of Aphelenchus avenae Bastian (Aphelenchidae) and Filenchus misellus Andrassy (Tylenchidae) on seven fungal isolates or Rhizoctonia solani as food source

Fungi and Macroaggregation in Deep-Sea Sediments

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