The distribution pattern of two juvenile hormone related compounds in Fraser fir and the induced response to a balsam woolly adelgid infestation

Fowler, Glenn; Jie, Zhang; Hain, Fred P.; Manville, J. F.

doi:10.1139/cjfr-31-10-1701

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…Several sesquiterpenes structurally related to ( E )‐α‐bisabolene (Fig. 1), such as juvabione and todomatuic acid, are produced in fir species (Rogers & Manville, 1972; Bohlmann et al ., 1998a; Fowler et al ., 2001), and have juvenile hormone‐like activity in insects (reviewed in Fowler et al ., 2001). In testing any of these terpenoids for toxicity or the modification of insect physiology or behaviour, it should be borne in mind that they must be active at biologically relevant concentrations to be important in conifer defence in a natural situation.…”

Section: Insect Interactions With Conifersmentioning

confidence: 99%

Genes, enzymes and chemicals of terpenoid diversity in the constitutive and induced defence of conifers against insects and pathogens*

2006

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Contents Summary 657 Introduction 658 Identification and functional characterization of terpenoid pathway genes 658 Insect interactions with conifers 667 Conclusions and outlook 670 Acknowledgements 671 References 671 Summary Insects select their hosts, but trees cannot select which herbivores will feed upon them. Thus, as long‐lived stationary organisms, conifers must resist the onslaught of varying and multiple attackers over their lifetime. Arguably, the greatest threats to conifers are herbivorous insects and their associated pathogens. Insects such as bark beetles, stem‐ and wood‐boring insects, shoot‐feeding weevils, and foliage‐feeding budworms and sawflies are among the most devastating pests of conifer forests. Conifer trees produce a great diversity of compounds, such as an enormous array of terpenoids and phenolics, that may impart resistance to a variety of herbivores and microorganisms. Insects have evolved to specialize in resistance to these chemicals – choosing, feeding upon, and colonizing hosts they perceive to be best suited to reproduction. This review focuses on the plant–insect interactions mediated by conifer‐produced terpenoids. To understand the role of terpenoids in conifer–insect interactions, we must understand how conifers produce the wide diversity of terpenoids, as well as understand how these specific compounds affect insect behaviour and physiology. This review examines what chemicals are produced, the genes and proteins involved in their biosynthesis, how they work, and how they are regulated. It also examines how insects and their associated pathogens interact with, elicit, and are affected by conifer‐produced terpenoids.

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Section: Insect Interactions With Conifersmentioning

confidence: 99%

Genes, enzymes and chemicals of terpenoid diversity in the constitutive and induced defence of conifers against insects and pathogens*

2006

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The systemic effects of juvenoids on the red firebug Pyrrhocoris apterus and on the pea aphid Acyrthosiphon pisum with data on life table response

Jedlička

Kuldová

Wimmer

2007

Pest Management Science

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Expected systemic activity of glycosidic juvenogens in P. apterus was not confirmed by exposure of the pea aphid on broad bean treated with aqueous solutions of the compounds. Nevertheless, the carbamate juvenoid alcohol 8 displayed a considerable juvenilizing effect on A. pisum in screening tests. Furthermore, this compound indicated a sublethal effect as the realized fecundity U(x) decreased disproportionately to the age-specific survival L(x) with increased concentration. The population parameters are compared with the data in similar demographic studies and are discussed together with the possibilities of using the compounds of this structural type in practice.

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New Threats to Forest Health Require Quick and Comprehensive Research Response

Hain

2006

Journal of Forestry

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Exotic pest introductions are a global threat occurring at an unprecedented rate. Comprehensive research programs are required at the onset to prevent the spread of the invasive insects, pathogens or plants, and rehabilitate and restore native habitats and ecosystems. Unfortunately, much of the current research on invasives is piecemeal. Past experiences with exotic and native pests provide some valuable lessons about how we should approach research programs on invasive organisms. The infrastructure required for effectively administering comprehensive research programs is complex. An example is discussed.

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The distribution pattern of two juvenile hormone related compounds in Fraser fir and the induced response to a balsam woolly adelgid infestation

Cited by 3 publications

References 27 publications

Genes, enzymes and chemicals of terpenoid diversity in the constitutive and induced defence of conifers against insects and pathogens*

Genes, enzymes and chemicals of terpenoid diversity in the constitutive and induced defence of conifers against insects and pathogens*

The systemic effects of juvenoids on the red firebug Pyrrhocoris apterus and on the pea aphid Acyrthosiphon pisum with data on life table response

New Threats to Forest Health Require Quick and Comprehensive Research Response

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