Fungal secondary metabolites as modulators of interactions with insects and other arthropods

Rohlfs, Marko; Churchill, Alice C. L.

doi:10.1016/j.fgb.2010.08.008

Cited by 236 publications

(159 citation statements)

References 192 publications

(226 reference statements)

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“…Detection of enemy-specific signals such as volatile chemicals at a distance and avoidance of an enemy is a key part of the defensive behavior of many insect orders, including isoptera (Gripenberg, et al, 2010;Najar-Rodriguez et al, 2010;Rohlfs and Churchill, 2011;Turcotte et al, 2012). Several authors have recognized that pathogenic fungal isolates can be repellent to termites, which may affect their effective deployment as mycoinsecticides (Milner, 2000;Cheragi et al, 2012;Chouvenc and Su, 2012).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Volatile Blends and Nucleotide Sequences of Two Beauveria Bassiana Isolates of Different Virulence and Repellency Towards the Termite Macrotermes Michealseni

2012

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Isolates of the fungus Beauveria bassiana have different levels of virulence and repellency against the termite Macrotermes michaelseni. In the present study, we compared the volatile profiles and gene sequences of two isolates of the fungus with different levels of virulence and repellence to the termite. Gas chromatography-mass spectrometric analyses showed quantitative and qualitative differences in the composition of volatiles of the two isolates. The repellencies of synthetic blends of 10 prominent components that mimicked the volatiles of each of the two isolates were significantly different. Subtractive bioassays showed that the repellency of each isolate was due to synergistic effects of a few constituents. As previously reported for isolates of Metarhizium anisopliae, some differences also were found in the nucleotide sequences of the two isolates of B. bassiana, suggesting a genetic basis for the observed intra-specific differences in their repellency and virulence against the termite.

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Section: Introductionmentioning

confidence: 99%

Comparison of Volatile Blends and Nucleotide Sequences of Two Beauveria Bassiana Isolates of Different Virulence and Repellency Towards the Termite Macrotermes Michealseni

2012

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“…Barra et al (2015) also reported that entomopathogen fungus Purpureocillium lilacinum had extracellular enzymes that degraded cuticle components, mainly hydrocarbons used as energy source. According to some authors, entomopathogenic fungi infect insects to produce a large amount of secondary metabolites, including toxins attributed to pathogenicity, among which are low molecular weight compounds and other peptidic nature as well as enzymes involved in the attacks on the host (Franco et al, 2011;Rohlfs and Churchhill, 2011).…”

Section: Discussionmentioning

confidence: 99%

Entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana as potential biological control agents of Coelaemenodera elaeidis of the oil palm (Elaeis guineensis Jacq.)

Eziashi¹,

Airede²,

Aisagbonhi³

et al. 2017

J. Agric. Biotech. Sustain. Dev.

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The potential of two entomopathogenic fungi Metarhizium anisopliae.and Beauveria bassiana for the control of Coelaemenodera elaeidis were evaluated. The objective of this study was to control C. elaeidis using entomopathogenic fungi as biocontrol agents. The pathogenicity of M. anisopliae and B. bassiana isolates were tested using direct contamination bioassay set up of 2.5 g conidia (2.5 g of Metarhizium 2.5 x 10 10 or 2.5g of Beauveria 10 11 ) transferred to the centre of plastic Petri dishes. Results from M. anisopliae studies indicated that C. elaeidis changed from yellow to brown and darker brown colour. Death of C. elaeidis was observed on the fourth day post incubation with 100% mortality and the control treatment recorded 14% mortality. C. elaeidis were observed with white mycelia growth on the ninth day, the green conidia appeared around the cadavers. Using B. bassiana, ingestion of spores caused infection from the mandible which spread to the thorax. Infection spread beneath the thorax colonizing the abdomen with white mycelia growth. Death was observed on C. elaeidis with 100% mortality on the sixth day post incubation. The larvae and pupae recorded deaths on the eighth and eleventh days post incubations with 100% each. The control treatment recorded mortalities at 21% for larvae and 7% for pupae. The study results indicated that both M. anisopliae and B. bassiana have a high potential as biocontrol agents for the control of C. elaeidis.

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“…They are also known examples of non-specific: morphological (Smith & Grula, 1982;Saito & Aoki, 1983) behavioural (Viliani et al, 1994;Myles, 2002) and physiological (Serebrov et al, 2006;Rohlfs & Churchill, 2011) defence mechanisms to avoid fungal pathogens. Viliani et al, (1994) found in laboratory experiments that the application of mycelial particles in soil affected the behaviour of both larval and adult Japanese beetles, Popilia japonica.…”

Section: Insect Resistance To Fungal Infectionsmentioning

confidence: 99%

Entomopathogenic Fungi as an Important Natural Regulator of Insect Outbreaks in Forests (Review)

Augustyniuk-Kram¹,

Kram²

2012

Forest Ecosystems - More Than Just Trees

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The common idea for many people is that forests are just a collection of trees. However, they are much more than that. They are a complex, functional system of interacting and often interdependent biological, physical, and chemical components, the biological part of which has evolved to perpetuate itself. This complexity produces combinations of climate, soils, trees and plant species unique to each site, resulting in hundreds of different forest types around the world. Logically, trees are an important component for the research in forest ecosystems, but the wide variety of other life forms and abiotic components in most forests means that other elements, such as wildlife or soil nutrients, should also be the focal point in ecological studies and management plans to be carried out in forest ecosystems. In this book, the readers can find the latest research related to forest ecosystems but with a different twist. The research described here is not just on trees and is focused on the other components, structures and functions that are usually overshadowed by the focus on trees, but are equally important to maintain the diversity, function and services provided by forests. The first section of this book explores the structure and biodiversity of forest ecosystems, whereas the second section reviews the research done on ecosystem structure and functioning. The third and last section explores the issues related to forest management as an ecosystem-level activity, all of them from the perspective of the �other� parts of a forest.

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Fungal secondary metabolites as modulators of interactions with insects and other arthropods

Cited by 236 publications

References 192 publications

Comparison of Volatile Blends and Nucleotide Sequences of Two Beauveria Bassiana Isolates of Different Virulence and Repellency Towards the Termite Macrotermes Michealseni

Comparison of Volatile Blends and Nucleotide Sequences of Two Beauveria Bassiana Isolates of Different Virulence and Repellency Towards the Termite Macrotermes Michealseni

Entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana as potential biological control agents of Coelaemenodera elaeidis of the oil palm (Elaeis guineensis Jacq.)

Entomopathogenic Fungi as an Important Natural Regulator of Insect Outbreaks in Forests (Review)

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