Occurrence and metabolic significance of microbodies in trophic hyphae of the nematophagous fungus Arthrobotrys oligospora

1989 ◽  
Vol 56 (3) ◽  
pp. 241-249 ◽  
Author(s):  
Marten Veenhuis ◽  
Wim Harder ◽  
Birgit Nordbring-Hertz
Keyword(s):  
Nematophagous Fungus ◽  
Arthrobotrys Oligospora ◽  
Metabolic Significance

Carbohydrate/lectin interactions between the nematophagous fungus,Arthrobotrys oligospora, and the infective juveniles ofTrichostrongylus colubriformis(Nematoda)

Parasitology ◽  
1990 ◽  
Vol 101 (1) ◽  
pp. 101-106 ◽  
Author(s):  
D. A. Wharton ◽  
D. S. Murray
Keyword(s):  
Binding Sites ◽  
Lectin Binding ◽  
Recognition System ◽  
Nematophagous Fungus ◽  
Infective Juvenile ◽  
Carbohydrate Binding ◽  
Slow Process ◽  
Arthrobotrys Oligospora ◽  
Inner Surface ◽  
Lectin Binding Sites

SUMMARYRemoval of the sheath of the ensheathed infective juvenile ofTrichostrongylus colubriformisprevents capture by the nematophagous fungusArthrobotrys oligospora. Exposure of the trap hyphae to a variety of saccharides, which may block a recognition system based on lectin/carbohydrate binding, failed to prevent capture but some saccharides did inhibit penetration and invasion by the fungus. Capture and penetration thus appear to be two distinct processes with capture being less specific than penetration. Carbohydrate residues were absent from the outer surface of the cuticle and the sheath but were present on the inner surface of the sheath. The limited accessibility of these lectin-binding sites may explain the slow process of infection of the infective juvenile by the fungus. The sheath does not protect the infective juvenile against attack by this nematophagous fungus.

The Woronin body in the nematophagous fungus Arthrobotrys oligospora is essential for trap formation and efficient pathogenesis

2017 ◽  
Vol 121 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Lianming Liang ◽  
Hong Gao ◽  
Jinzhou Li ◽  
Lu Liu ◽  
Zhiheng Liu ◽  
...  
Keyword(s):  
Nematophagous Fungus ◽  
Arthrobotrys Oligospora ◽  
Trap Formation ◽  
Woronin Body

scholarly journals Nematophagous fungus Arthrobotrys oligospora mimics olfactory cues of sex and food to lure its nematode prey

eLife ◽  
2017 ◽  
Vol 6 ◽  
Author(s):  
Yen-Ping Hsueh ◽  
Matthew R Gronquist ◽  
Erich M Schwarz ◽  
Ravi David Nath ◽  
Ching-Han Lee ◽  
...  
Keyword(s):  
Nematophagous Fungus ◽  
Rna Seq ◽  
Food Cues ◽  
Arthrobotrys Oligospora ◽  
Predator Prey ◽  
Mass Spectral ◽  
C Elegans ◽  
Multiple Receptors ◽  
Caenorhabditis Species ◽  
Chromatographic Mass

To study the molecular basis for predator-prey coevolution, we investigated how Caenorhabditis elegans responds to the predatory fungus Arthrobotrys oligospora. C. elegans and other nematodes were attracted to volatile compounds produced by A. oligospora. Gas-chromatographic mass-spectral analyses of A. oligospora-derived volatile metabolites identified several odors mimicking food cues attractive to nematodes. One compound, methyl 3-methyl-2-butenoate (MMB) additionally triggered strong sex- and stage-specific attraction in several Caenorhabditis species. Furthermore, when MMB is present, it interferes with nematode mating, suggesting that MMB might mimic sex pheromone in Caenorhabditis species. Forward genetic screening suggests that multiple receptors are involved in sensing MMB. Response to fungal odors involves the olfactory neuron AWCs. Single-cell RNA-seq revealed the GPCRs expressed in AWC. We propose that A. oligospora likely evolved the means to use olfactory mimicry to attract its nematode prey through the olfactory neurons in C. elegans and related species.

A Nematotoxin produced by the Nematophagous Fungus Arthrobotrys oligospora Fresenius

Nature ◽  
1963 ◽  
Vol 197 (4866) ◽  
pp. 514-515 ◽  
Author(s):  
TH. H. A. OLTHOF ◽  
R. H. ESTEY
Keyword(s):  
Nematophagous Fungus ◽  
Arthrobotrys Oligospora

scholarly journals Author response: Nematophagous fungus Arthrobotrys oligospora mimics olfactory cues of sex and food to lure its nematode prey

2016 ◽  
Author(s):  
Yen-Ping Hsueh ◽  
Matthew R Gronquist ◽  
Erich M Schwarz ◽  
Ravi David Nath ◽  
Ching-Han Lee ◽  
...  
Keyword(s):  
Nematophagous Fungus ◽  
Olfactory Cues ◽  
Author Response ◽  
Arthrobotrys Oligospora

Capture and penetration processes of the free-living juveniles ofTrichostrongylus colubriformis(Nematoda) by the nematophagous fungus,Arthrobotrys oligospora

Parasitology ◽  
1990 ◽  
Vol 101 (1) ◽  
pp. 93-100 ◽  
Author(s):  
D. S. Murray ◽  
D. A. Wharton
Keyword(s):  
Secondary Infection ◽  
Freeze Substitution ◽  
Nematophagous Fungus ◽  
Differential Interference Contrast ◽  
Invasion Process ◽  
Arthrobotrys Oligospora ◽  
Free Living ◽  
Stage Juvenile ◽  
Juvenile Stages ◽  
Scanning Electron

SUMMARYThe nematode-trapping fungusArthrobotrys oligosporatraps and invades all the free-living juvenile stages of the tri-chostrongyle nematodeTrichostrongylus colubriformis. The processes of capture and invasion of the 1st-stage juveniles are described using differential interference contrast optics and 3-D reconstruction techniques. The adhesive responsible for capture is well preserved using a freeze-substitution technique for scanning electron microscopy. The invasion process of the ensheathed 3rd-stage juvenile ofT. colubriformistakes much longer than in the 1st- or 2nd-stage juvenile and involves the formation of secondary infection pegs between the sheath and the cuticle which appear to penetrate the cuticle by physical pressure.

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