The systematic position of Zoophagus insidians

Dick, M.W.

doi:10.1016/s0953-7562(09)80360-2

Cited by 24 publications

(6 citation statements)

References 44 publications

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“…Zoopagus insidians was originally placed in the Oomycota (Prowse 1954) until an accumulation of biochemical and ultrastructural data necessitated its transfer to the Zoopagales (Dick 1990). Zoophagus pectospora was originally described as a species of Acaulopage (Dreschler 1962) but was transferred to Zoophagus (Dick 1990) based on ultrastructural data (Saikawa and Morikawa 1985) and the ability to trap both nematodes and rotifers (Saikawa et al 1988). Our results support the close relationship of Zoophagus pectospora and Z. insidians but indicate that the genus is not monophyletic.…”

Section: Discussionsupporting

confidence: 63%

“…Whereas our isolate of Zoopagus insidians groups with a sequence derived from a culture (Tanabe et al 2000), our isolate of Zoophagus pectospora is sister to a clade containing Stylopage hadra. Zoopagus insidians was originally placed in the Oomycota (Prowse 1954) until an accumulation of biochemical and ultrastructural data necessitated its transfer to the Zoopagales (Dick 1990). Zoophagus pectospora was originally described as a species of Acaulopage (Dreschler 1962) but was transferred to Zoophagus (Dick 1990) based on ultrastructural data (Saikawa and Morikawa 1985) and the ability to trap both nematodes and rotifers (Saikawa et al 1988).…”

Section: Discussionmentioning

confidence: 99%

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A new 18S rRNA phylogeny of uncultured predacious fungi (Zoopagales)

et al. 2019

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Previous molecular phylogenetic studies have shown that families in Zoopagales are not monophyletic. To test the monophyly of genera and species in the order, we used a single-cell approach to generate nuclear 18S rRNA (18S) sequences for 10 isolates representing nine taxa. We provide the first sequences for the genus Zoopage and additional sequences for taxa in Cocholonema, Acaulopage, and Zoophagus. Our results reveal that Zoophagus, Zoopage, and Acaulopage tetraceros are not monophyletic. We conclude that morphology alone is not sufficient to delineate genera and species in the order and encourage studies that increase genetic sampling of taxa including type species.

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Section: Discussionsupporting

confidence: 63%

Section: Discussionmentioning

confidence: 99%

A new 18S rRNA phylogeny of uncultured predacious fungi (Zoopagales)

et al. 2019

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“…According to morphological features, the fungus was classified as Zoophagus sp. [ 22 ], where the main criterion distinguishing Zoophagus from Lecophagus was the septation of mycelium and conidia. According to the sequence of the 18s rDNA region, the fungus was identified as Zoophagus insidians .…”

Section: Resultsmentioning

confidence: 99%

Extraordinary Multi-Organismal Interactions Involving Bacteriophages, Bacteria, Fungi, and Rotifers: Quadruple Microbial Trophic Network in Water Droplets

Turnau

Fiałkowska

Ważny

et al. 2021

IJMS

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Our observations of predatory fungi trapping rotifers in activated sludge and laboratory culture allowed us to discover a complicated trophic network that includes predatory fungi armed with bacteria and bacteriophages and the rotifers they prey on. Such a network seems to be common in various habitats, although it remains mostly unknown due to its microscopic size. In this study, we isolated and identified fungi and bacteria from activated sludge. We also noticed abundant, virus-like particles in the environment. The fungus developed absorptive hyphae within the prey. The bacteria showed the ability to enter and exit from the hyphae (e.g., from the traps into the caught prey). Our observations indicate that the bacteria and the fungus share nutrients obtained from the rotifer. To narrow the range of bacterial strains isolated from the mycelium, the effects of bacteria supernatants and lysed bacteria were studied. Bacteria isolated from the fungus were capable of immobilizing the rotifer. The strongest negative effect on rotifer mobility was shown by a mixture of Bacillus sp. and Stenotrophomonas maltophilia. The involvement of bacteriophages in rotifer hunting was demonstrated based on molecular analyses and was discussed. The described case seems to be an extraordinary quadruple microbiological puzzle that has not been described and is still far from being understood.

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“…One of the obtained clones, coded as Z1, was used in the experiment. We classified this fungus as Lecophagus according to a key provided by Dick [ 26 ], in which the main criterion distinguishing Lecophagus from Zoophagus is the septation of the mycelium. The fungus mycelium is approximately 6.5 μm wide, branched and septate (Fig.…”

Section: Methodsmentioning

confidence: 99%

Temperature-Dependence of Predator-Prey Dynamics in Interactions Between the Predatory Fungus Lecophagus sp. and Its Prey L. inermis Rotifers

Fiałkowska

Pajdak‐Stós

2017

Microb Ecol

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Temperature is considered an important factor that influences the bottom-up and top-down control in water habitats. We examined the influence of temperature on specific predatory-prey dynamics in the following two-level trophic system: the predatory fungus Lecophagus sp. and its prey Lecane inermis rotifers, both of which originated from activated sludge obtained from a wastewater treatment plant (WWTP). The experiments investigating the ability of conidia to trap rotifers and the growth of fungal mycelium were performed in a temperature range that is similar to that in WWTPs in temperate climate. At 20 °C, 80% of the conidia trapped the prey during the first 24 h, whereas at 8 °C, no conidium was successful. The mycelium growth rate was the highest at 20 °C (r = 1.44) during the first 48 h but decreased during the following 24 h (r = 0.98), suggesting the quickest use of resources. At a medium temperature of 15 °C, the tendency was opposite, and the r value was lower during the first 48 h. At 8 °C, the growth rate was very low and remained at the same level even though numerous active rotifers were potentially available for the fungus. The temperature also influences the production of new conidia; on the 7th day, new conidia were observed in 96% of the wells at 20 °C, but no new conidia were observed at 8°C. These results show that the prey (rotifers)-predator (Lecophagus) dynamics in WWTPs is temperature-dependent, and a temperature of 8 °C is a strongly limiting factor for the fungus. Moderate temperatures ensure the most stable coexistence of the fungus and its prey, whereas the highest temperature can promote the prevalence of the predator.Electronic supplementary materialThe online version of this article (10.1007/s00248-017-1060-5) contains supplementary material, which is available to authorized users.

show abstract

The systematic position of Zoophagus insidians

Cited by 24 publications

References 44 publications

A new 18S rRNA phylogeny of uncultured predacious fungi (Zoopagales)

A new 18S rRNA phylogeny of uncultured predacious fungi (Zoopagales)

Extraordinary Multi-Organismal Interactions Involving Bacteriophages, Bacteria, Fungi, and Rotifers: Quadruple Microbial Trophic Network in Water Droplets

Temperature-Dependence of Predator-Prey Dynamics in Interactions Between the Predatory Fungus Lecophagus sp. and Its Prey L. inermis Rotifers

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