The Predaceous Fungus Arthrobotrys dactyloides: Induction of Trap Formation

Balán, J.; Lechevalier, H. A.

doi:10.2307/3757949

Cited by 14 publications

(7 citation statements)

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“…Gronvold et al ( 8 ) and Sun and Liu ( 31 ) reported that the formation of capture organs is dependent on the species and type of fungus as well as biological and abiological environmental characteristics. Moreover, Balan and Lechevalier ( 3 ) found that the formation of capture organs in A. dactyloides was induced by athrepsy or dehydration. Based on the results obtained in this study, we hypothesized that the inhibition of fungal growth by the antimicrobial substances contained in BPE made it difficult for fungi to acquire sufficient nutrients from the medium, which resulted in an increase in the formation of capture organs for nourishment acquisition.…”

Section: Discussionmentioning

confidence: 99%

“…There were five replicates per treatment, and plants were cultivated in a greenhouse without temperature control in the range of approximately 12 to 32°C. Plant height and weight, root weight, root-knot formation, and M. incognita population density were measured at the end of the cultivation period after 45 d. The formation of root knots in tomato plants was rated according to the following scale: 0, no root knots; 1, a few ( 1 – 2 ) root knots; 2, a moderate number ( 3 – 10 ) of separated root knots; 3, 11–30 root knots, many of them continuous; and 4, ≥31 root knots, mostly continuous without fine roots. M. incognita J2s were isolated from 20 g of soil collected from each pot after 48 h using the Baermann funnel method ( 26 ) and then counted, with a total of 3 replicates per soil sample.…”

Section: Methodsmentioning

confidence: 99%

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Efficacy of a Simple Formulation Composed of Nematode-Trapping Fungi and Bidens pilosa var. radiata Scherff Aqueous Extracts (BPE) for Controlling the Southern Root-Knot Nematode

et al. 2018

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We tested a formulation composed of a mixture of Bidens pilosa var. radiata extract (BPE) and nematode-trapping fungi for its effects on Meloidogyne incognita. In earlier evaluations of the effects of plant extracts on the hyphal growth of 5 species of nematode-trapping fungi with different capture organs (traps), the growth of all species was slightly inhibited. However, an investigation on the number of capture organs and nematode-trapping rates revealed that Arthrobotrys dactyloides formed significantly more rings and nematode traps than those of the control. An evaluation of simple mixed formulations prepared using sodium alginate showed that nematodes were captured with all formulations tested. The simple mixed formulation showed a particularly high capture rate. Furthermore, in a pot test, although the effects of a single formulation made from the fungus or plant extract were acceptable, the efficacy of the simple mixed formulation against M. incognita root-knot formation was particularly high.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Efficacy of a Simple Formulation Composed of Nematode-Trapping Fungi and Bidens pilosa var. radiata Scherff Aqueous Extracts (BPE) for Controlling the Southern Root-Knot Nematode

et al. 2018

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“…Many studies have shown that the direct contact of living nematodes with hyphae is highly effective in inducing trap formation (e.g. Balan & Lechevalier, ; Nordbring‐Hertz, ; Saxena, Dayal & Mukerji, ; Xie et al ., ). Recently, interaction between the four juvenile stages of Caenorhabditis elegans and eight species of NTF was studied, and the results suggested that the number of traps induced generally increased with increasing juvenile stage of C. elegans (Xie et al ., ).…”

Section: Inducers and Trap Formationmentioning

confidence: 99%

Trapping devices of nematode-trapping fungi: formation, evolution, and genomic perspectives

Yong

Zhou

et al. 2015

Biol Rev

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Nematode-trapping fungi (NTF) are potential biological control agents against plant- and animal-parasitic nematodes. These fungi produce diverse trapping devices (traps) to capture, kill, and digest nematodes as food sources. Most NTF can live as both saprophytes and parasites. Traps are not only the weapons that NTF use to capture and infect nematodes, but also an important indicator of their switch from a saprophytic to a predacious lifestyle. Formation of traps and their numbers are closely related to the nematicidal activity of NTF, so the mechanisms governing trap formation have become a focus of research on NTF. Recently, much progress has been made in our understanding of trap formation, evolution, and the genome, proteome and transcriptome of NTF. Here we provide a comprehensive overview of recent advances in research on traps of NTF. Various inducers of trap formation, trap development, structural properties and evolution of traps are summarized and discussed. We specifically discuss the latest studies of NTF based on genomic, proteomic and transcriptomic analyses.

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“…Limited nutrition is essential for trap induction (Nordbring-Hertz, 1968), and some fungi form traps when they are transferred from a nutrient-rich medium to a nutrient-poor medium (Balan and Lechevalier, 1972).…”

Section: Morphogenesis Of Constricting Ringsmentioning

confidence: 99%

How carnivorous fungi use three-celled constricting rings to trap nematodes

et al. 2012

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Predacious fungi form specialized hyphae structures to trap nematodes and other microscopic animals. Among the six kinds of trapping devices, the constricting ring is the only one that actively captures nematodes. When a nematode enters the aperture of the ring, which is formed by three cells, the cells rapidly triple their volume, close the aperture and hold the nematode in place. Hyphae then penetrate and consume the nematode. This paper reviews the data and hypotheses on conserving the evolution of constricting rings and their cytological and molecular mechanisms.

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The Predaceous Fungus Arthrobotrys dactyloides: Induction of Trap Formation

Cited by 14 publications

References 0 publications

Efficacy of a Simple Formulation Composed of Nematode-Trapping Fungi and <i>Bidens pilosa</i> var. <i>radiata</i> Scherff Aqueous Extracts (BPE) for Controlling the Southern Root-Knot Nematode

Efficacy of a Simple Formulation Composed of Nematode-Trapping Fungi and <i>Bidens pilosa</i> var. <i>radiata</i> Scherff Aqueous Extracts (BPE) for Controlling the Southern Root-Knot Nematode

Trapping devices of nematode-trapping fungi: formation, evolution, and genomic perspectives

How carnivorous fungi use three-celled constricting rings to trap nematodes

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