Insecticidal and Nematicidal Metabolites from Fungi

Anke, Heidrun; Sterner, Olov

doi:10.1007/978-3-642-11458-8_7

Cited by 10 publications

(9 citation statements)

References 95 publications

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“…Fungal endophytes may provide several benefits to plants such as protection against diseases (Carroll 1988;Vilich et al 1998;Redman et al 1999Redman et al , 2001), production of secondary metabolites effective versus host pathogens (Noble et al 1991;Calhoun et al 1992;Schulz et al 1995;Liu et al 2001a), protection against insect pests (Latch 1993;Azevedo et al 2000;Anke and Sterner 2002), herbivore resistance (Latch 1993), or growth promotion (Allen 1992;Varma et al 1999Varma et al , 2000Jumpponen 2001;Ernst et al 2003). Some endophytes may also improve the phosphorus uptake by the plant (Sieber 2002), its photosynthetic efficiency (Obledo et al 2003), or increase the host's tolerance to abiotic stresses, such as drought (Read and Camp 1986;Bacon and Hill 1996), metals (Read 1999), salts (Rodriguez and Redman 2008), or high temperatures (Redman et al 2002).…”

Section: The Fungal Endophytesmentioning

confidence: 99%

New Insights on the Mode of Action of Fungal Pathogens of Invertebrates for Improving Their Biocontrol Performance

Maciá‐Vicente

Palma‐Guerrero

Gómez-Vidal

et al. 2011

Biological Control of Plant-Parasitic Nematodes:

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The main fungal pathogens of invertebrates (FPI), nematophagous fungi and entomopathogenic fungi, have an important lifestyle overlapping. This is mainly due to the characteristics in common that their host share. Both groups of biocontrol agents share pathogenic determinants because the barriers of nematodes and insects are evolutionary conserved. Recently endophytism has been found a new aspect of the mode of action of FPI which has a potential relevance in biocontrol performance. The rationale is because they can modulate plant defences and because they act where their pest targets live and act. Natural vegetation is a reservoir root endophytes and subsequently a microbe group to screen for new biocontrol agents of plant-parasitic nematodes and root dwelling insect pests. We have found that FPI are compatible with chitosan natural compounds which may enhance their biocontrol potential.

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Section: The Fungal Endophytesmentioning

confidence: 99%

New Insights on the Mode of Action of Fungal Pathogens of Invertebrates for Improving Their Biocontrol Performance

Maciá‐Vicente

Palma‐Guerrero

Gómez-Vidal

et al. 2011

Biological Control of Plant-Parasitic Nematodes:

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“…Additionally, we also observed that probit value of proof mortality showed a linear increase with increasing log 10 (C) and the LC 50 values of metabolites 1-4 against B. xylophilus were 209.7, 229.6, 220.3, and 206.1 mg L -1 , at 36 h exposure, respectively. The suppressive effects of some fungal phytochemical metabolites on nematode populations have been well documented in several pathosystems (Anke and Sterner, 1997). These compounds could be developed for use as nematicides themselves, or could serve as model compounds for the development of environmentally friendly synthetic derivatives.…”

Section: Antinematodal Activity Of Metabolites 1-4 Of Caryospora Callmentioning

confidence: 99%

“…Many fungal metabolites with antinematodal activity have also been isolated and identified as alkaloids, peptides, terpenes, fatty acids etc. (Anke and Sterner, 1997;Chitwood, 2002;. However, among these, only very few reports are related to antinematodal fungi and metabolites against pine wood nematodes (Kawazu et al, 1993;Huang et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Screening and isolation of antinematodal metabolites againstBursaphelenchus xylophilus produced by fungi

et al. 2008

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Sixty crude cultural filtrates of thirty fresh water fungi individually grown in both Potato Dextrose broth and GPC broth were assayed in vitro for antinematodal activity against Bursaphelenchus xylophilus (Steiner et Buhrer) Nickle using immersion test. Filtrates from Camposporium quercicola YMF1.01300, Periconia digitata YMF1.00948, Caryospora callicarpa YMF1.01026 grown in both PDB and GPC broth, and the cultural filtrate of Melanospora zamiae YMF1.00948 grown in PDB were found to be pathogenic to the tested nematodes. The degree of activity varied with the fungal species, length of exposure time, and media composition. From a nematicidal cultural extract of Caryospora callicarpa YMF1.01026, four known naphthalenones were isolated and identified as 4,8-dihydroxy-3,4-dihydronaphthalen-1(2H)-one (1), 4,6-dihydroxy -3,4-dihydronaphthalen-1(2H)-one (2), 4,6,8-trihydroxy-3,4-dihydronaphthalen-1(2H)-one) (3), 3,4,6,8-tetrahydroxy-3,4-dihydronaphthalen-1(2H)-one (cis-4-hydroxyscytalone) (4) by NMR and MS analysis. All four metabolites showed noticeable biological activity against B. xylophilus nematode. This is the first published report of these compounds affecting plant-parasitic nematodes.

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“…Consequently, the search for naturally occurring compounds with nematocidal activity has been stimulated as an alternative to using existing compounds (Chitwood, 2002). Soil fungi that inhabit the rhizosphere may serve as a source for such compounds since they share the same environment as the nematodes and produce metabolites as a strategy for protecting their habitat from plant-parasitic nematodes or other organisms (Anke and Sterner, 1997). These fungi may release compounds that directly kill nematodes, suppress nematode motility, reduce egg hatching and/or interfere with metabolic processes.…”

Section: Introductionmentioning

confidence: 99%

Screening culture filtrates of fungi for activity against Tylenchulus semipenetrans

Verdejo-Lucas¹,

Viera²,

Stchigel³

et al. 2009

Span. j. agric. res.

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Culture f iltrates of 20 fungi isolated from citrus soils were screened for their activity against Tylenchulus semipenetrans in both in vitro and greenhouse tests. The filtrates of Talaromyces cyanescens (isolates 2-4 and 2-5), Paecilomyces lilacinus, Chaetomium robustum, Acremonium strictum, Engyodontium album, Myrothecium verrucaria, Emericella rugulosa, and Tarracomyces gigaspora consistently inhibited the motility of second-stage juveniles at various concentrations of the filtrate. Dose-response models were used to determine the filtrate concentration required to inhibit the motility of 50% of the juveniles (CI50). The culture filtrate of P. lilacinus showed the highest activity with a CI50 value of 58% that differed from that of C. robustum (CI50 = 68%), and A. strictum CI50 = 82%. The culture filtrates of P. lilacinus, E. album, and T. cyanescens 2-5 maintained their activity when autoclaved at 120ºC for 20 min. The autoclaved filtrate of T. cyanescens 2-4 was more effective at inhibiting juvenile motility (CI50 = 28%) than that of T. cyanescens 2-5 (CI50 = 80%), C. robustum (CI50 = 72 %) and P. lilacinus (CI50 = 72%). The culture filtrate of T. cyanescens 2-4 also inhibited egg hatching. Nematode reproduction on Cleopatra mandarin and Carrizo citrange were respectively reduced by the culture filtrate of P. lilacinus and the autoclaved filtrate of T. cyanescens 2-4. These results support the hypothesis that soil fungi may contribute to regulate nematode densities by the production of secondary metabolites with nematicidal activity.Additional key words: Carrizo citrange, citrus nematode, Cleopatra mandarin, nematicidal activity, soil-borne fungi. Resumen Evaluación de filtrados de cultivos fúngicos de hongos por su actividad frente a Tylenchulus semipenetransSe evaluó la actividad de filtrados de cultivos de 20 hongos aislados del suelo en parcelas de cítricos frente a Tylenchulus semipenetrans mediante ensayos in vitro y en invernadero. Los filtrados de Talaromyces cyanescens (aislados 2-4 y 2-5), Paecilomyces lilacinus, Chaetomium robustum, Acremonium strictum, Engyodontium album, Myrothecium verrucaria, Emericella rugulosa, y Tarracomyces gigaspora inhibieron consistentemente la movilidad de los juveniles de segundo estadio del nematodo a varias concentraciones del filtrado. Se utilizaron modelos de dosis-respuesta para determinar la concentración del filtrado que inhibía la movilidad del 50% de los juveniles (CI50). El filtrado del cultivo de P. lilacinus mostró la máxima actividad entre todos los ensayados con un valor de CI50 del 58%, la cual era superior a la de los filtrados de C. robustum (CI50 = 68%) y A. strictum (CI50 = 82%). Los filtrados de P. lilacinus, E. album, y T. cyanescens 2-5 retenían su actividad después de autoclavarlos a 120ºC durante 20 min. La inhibición de la movilidad de los juveniles obtenida con el filtrado autoclavado de T. cyanescens 2-4 (CI50 = 28%) fue superior a la de los filtrados de T. cyanescens 2-5 (CI50 = 80%), C. robustum (CI50 = 72%), ó P. lilacinus (CI50 =...

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Insecticidal and Nematicidal Metabolites from Fungi

Cited by 10 publications

References 95 publications

New Insights on the Mode of Action of Fungal Pathogens of Invertebrates for Improving Their Biocontrol Performance

New Insights on the Mode of Action of Fungal Pathogens of Invertebrates for Improving Their Biocontrol Performance

Screening and isolation of antinematodal metabolites againstBursaphelenchus xylophilus produced by fungi

Screening culture filtrates of fungi for activity against Tylenchulus semipenetrans

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