The Role of Terpene Synthases in the Direct and Indirect Defense of Conifers Against Insect Herbivory and Fungal Pathogens

Huber, Dezene P. W.; Bohlmann, Jörg

doi:10.1007/0-387-23266-4_13

Cited by 9 publications

(6 citation statements)

References 80 publications

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“…Terpene enrichment is consistent with host–fungal communication and may relate to host specificity, as terpenes have been found to play critical roles in the process of recognition and response among fungi, bacteria, plants and insects (Zhao et al ., 2012). Basidiomycete fungi primarily produce sesqui‐, di‐ and triterpenes (Quin et al ., 2014), while many plant hosts, notably pines, produce a large number of monoterpenes that can inhibit fungal growth (Melin & Krupa, 1971; Huber & Bohlmann, 2006). ECM‐derived sesquiterpenes are associated with lateral root development and increased substrate availability and may be of particular importance to the process of mycorrhization (Ditengou et al ., 2015).…”

Section: Discussionmentioning

confidence: 99%

Comparative genomics reveals dynamic genome evolution in host specialist ectomycorrhizal fungi

et al. 2021

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Summary While there has been significant progress characterizing the ‘symbiotic toolkit’ of ectomycorrhizal (ECM) fungi, how host specificity may be encoded into ECM fungal genomes remains poorly understood. We conducted a comparative genomic analysis of ECM fungal host specialists and generalists, focusing on the specialist genus Suillus. Global analyses of genome dynamics across 46 species were assessed, along with targeted analyses of three classes of molecules previously identified as important determinants of host specificity: small secreted proteins (SSPs), secondary metabolites (SMs) and G‐protein coupled receptors (GPCRs). Relative to other ECM fungi, including other host specialists, Suillus had highly dynamic genomes including numerous rapidly evolving gene families and many domain expansions and contractions. Targeted analyses supported a role for SMs but not SSPs or GPCRs in Suillus host specificity. Phylogenomic‐based ancestral state reconstruction identified Larix as the ancestral host of Suillus, with multiple independent switches between white and red pine hosts. These results suggest that like other defining characteristics of the ECM lifestyle, host specificity is a dynamic process at the genome level. In the case of Suillus, both SMs and pathways involved in the deactivation of reactive oxygen species appear to be strongly associated with enhanced host specificity.

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Section: Discussionmentioning

confidence: 99%

Comparative genomics reveals dynamic genome evolution in host specialist ectomycorrhizal fungi

et al. 2021

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“…Terpenoids are one of the largest group of defensive chemicals occurring in conifers (also found in broad-leaved trees), and this group is the most abundant compound class involved in chemical defense (Huber and Bohlmann 2006). Besides that, terpenoids are promising biochemical markers for characterizing of diverse tree species and for estimating geographic variation among different origins of P. abies (Persson et al 1996).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of potential genetic and chemical markers for Scots pine tolerance against Heterobasidion annosum infection

Mukrimin

Kovalchuk

Ghimire

et al. 2019

Planta

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“…Lignin and other phenolics can strengthen cell walls and therefore can be anti-nutritional (BrodeurCampbell et al, 2006;Schroeder et al, 2006). Some phenolics and sesquiterpenes along with other volatiles can repel herbivores from oviposition on host plants (Henzell & Hall, 1974;DeMoraes et al, 2001;Huber et al, 2006).…”

Section: Plant Secondary Metabolitesmentioning

confidence: 99%

Inducible direct plant defense against insect herbivores: A review

2008

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Plants respond to insect herbivory with responses broadly known as direct defenses, indirect defenses, and tolerance. Direct defenses include all plant traits that affect susceptibility of host plants by themselves. Overall categories of direct plant defenses against insect herbivores include limiting food supply, reducing nutrient value, reducing preference, disrupting physical structures, and inhibiting chemical pathways of the attacking insect. Major known defense chemicals include plant secondary metabolites, protein inhibitors of insect digestive enzymes, proteases, lectins, amino acid deaminases and oxidases. Multiple factors with additive or even synergistic impact are usually involved in defense against a specific insect species, and factors of major importance to one insect species may only be of secondary importance or not effective at all against another insect species. Extensive qualitative and quantitative high throughput analyses of temporal and spatial variations in gene expression, protein level and activity, and metabolite concentration will accelerate not only the understanding of the overall mechanisms of direct defense, but also accelerate the identification of specific targets for enhancement of plant resistance for agriculture.

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The Role of Terpene Synthases in the Direct and Indirect Defense of Conifers Against Insect Herbivory and Fungal Pathogens

Cited by 9 publications

References 80 publications

Comparative genomics reveals dynamic genome evolution in host specialist ectomycorrhizal fungi

Comparative genomics reveals dynamic genome evolution in host specialist ectomycorrhizal fungi

Evaluation of potential genetic and chemical markers for Scots pine tolerance against Heterobasidion annosum infection

Inducible direct plant defense against insect herbivores: A review

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