Beetle feeding induces a different volatile emission pattern from black poplar foliage than caterpillar herbivory

Unsicker, Sybille B.; Gershenzon, Jonathan; Köllner, Tobias G.

doi:10.4161/15592324.2014.987522

Cited by 13 publications

(15 citation statements)

References 19 publications

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“…Plants effectively use their secondary metabolites to protect themselves against herbivores and pathogens (Francis et al, 2004; Zhu and Park, 2005; Boone et al, 2008; Halitschke et al, 2008; Unsicker et al, 2015). At the same time, natural enemies use these induced compounds to seek their hosts.…”

Section: Discussionmentioning

confidence: 99%

“…At the same time, natural enemies use these induced compounds to seek their hosts. When insect vectors feed on pathogen infected plants, the defense mechanisms of the natural enemies, plants as well as the vectors are disturbed, due to changes in the synthesis of plant volatiles (Francis et al, 2004; Sullivan, 2005; Boone et al, 2008; Unsicker et al, 2015). In this study, we found that D. citri -infected citrus emitted less D -limonene and beta-ocimene, compared to citrus damaged by the vector insect as well as infected by Las; these plants produced high quantities of methyl salicylate.…”

Section: Discussionmentioning

confidence: 99%

“…Simultaneous insect damage and pathogenic bacterial infection of citrus host plants have been reported to induce volatiles that modify not only the behavior of its insect vector (Mann et al, 2012) but also their natural enemies (Li et al, 2014). A number of studies have demonstrated that HIPVs emitted by infected plants attract more obligatory parasites or wasps (Francis et al, 2004; Sullivan, 2005; Zhu and Park, 2005; Boone et al, 2008; Halitschke et al, 2008; Zhang et al, 2009; Unsicker et al, 2015). The results of this study showed that infection of plants with pathogens through insect vectors may alter the balance and amounts of volatiles emitted by the infected plants thus reducing their attraction to a facultative predator, P. japonica .…”

Section: Discussionmentioning

confidence: 99%

“…D -limonene is one of most significant emitted volatiles of citrus and was previously identified to attract predatory beetles (Wheeler et al, 2002; Francis et al, 2004; Himanen et al, 2005; Zhu and Park, 2005; Heil and Silva Bueno, 2007; Wei et al, 2007; Boone et al, 2008; Halitschke et al, 2008; Zhang et al, 2009; Hare and Sun, 2011; Unsicker et al, 2015). Contrary to this, some studies also demonstrated that methyl salicylate could be used as an attractant cue for some beetle species (Francis et al, 2004; Boone et al, 2008; Halitschke et al, 2008; Zhang et al, 2009; Unsicker et al, 2015). Variations in the emitted quantities of these three major compounds may therefore explain the reduction in the attractiveness of Las-infected and/or psyllids-infested citrus host plants to P. japonica , compared to healthy plants.…”

Section: Discussionmentioning

confidence: 99%

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Diaphorina citri Induces Huanglongbing-Infected Citrus Plant Volatiles to Repel and Reduce the Performance of Propylaea japonica

Lin

Akutse

et al. 2016

Front. Plant Sci.

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Transmission of plant pathogens through insect vectors is a complex biological process involving interactions between the host plants, insects, and pathogens. Simultaneous impact of the insect damage and pathogenic bacteria in infected host plants induce volatiles that modify not only the behavior of its insect vector but also of their natural enemies, such as parasitoid wasps. Therefore, it is essential to understand how insects such as the predator ladybird beetle responds to volatiles emitted from a host plant and how the disease transmission alters the interactions between predators, vector, pathogens, and plants. In this study, we investigated the response of Propylaea japonica to volatiles from citrus plants damaged by Diaphorina citri and Candidatus Liberibacter asiaticus through olfactometer bioassays. Synthetic chemical blends were also used to determine the active compounds in the plant volatile. The results showed that volatiles emitted by healthy plants attracted more P. japonica than other treatments, due to the presence of high quantities of D-limonene and beta-ocimene, and the lack of methyl salicylate. When using synthetic chemicals in the olfactory tests, we found that D-limonene attracted P. japonica while methyl salicylate repelled the predator. However, beta-ocimene attracted the insects at lower concentrations but repelled them at higher concentrations. These results indicate that P. japonica could not efficiently search for its host by using volatile cues emitted from psyllids- and Las bacteria-infected citrus plants.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Diaphorina citri Induces Huanglongbing-Infected Citrus Plant Volatiles to Repel and Reduce the Performance of Propylaea japonica

Lin

Akutse

et al. 2016

Front. Plant Sci.

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“…Salicinoids, a group of phenolic glycosides highly abundant in poplar trees (Boeckler et al 2011 ) negatively affect generalist herbivore performance (Hemming and Lindroth 1995 ; Lindroth and Peterson 1988 ; Osier and Lindroth 2001 ). Protease inhibitors (Bradshaw et al 1990 ; Haruta et al 2001 ) and certain classes of volatiles (Clavijo McCormick et al 2014b ; Unsicker et al 2015 ) are also typical poplar compounds reported to be active in defense against herbivores.…”

Section: Introductionmentioning

confidence: 99%

Specificity of Herbivore Defense Responses in a Woody Plant, Black Poplar (Populus nigra)

2019

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The specificity of woody plant defense responses to different attacking herbivores is poorly known. We investigated the responses of black poplar ( Populus nigra ) to leaf feeding by three lepidopteran species ( Lymantria dispar, Laothoe populi and Amata mogadorensis ) and two leaf beetle species ( Phratora vulgatissima and Chrysomela populi ). Of the direct defenses monitored, increases in trypsin protease inhibitor activity and the salicinoid salicin were triggered by herbivore damage, but this was not herbivore-specific. Moreover, the majority of leaf salicinoid content was present constitutively and not induced by herbivory. On the other hand, volatile emission profiles did vary among herbivore species, especially between coleopterans and lepidopterans. Monoterpenes and sesquiterpenes were induced in damaged and adjacent undamaged leaves, while the emission of green leaf volatiles, aromatic and nitrogen-containing compounds (known to attract herbivore enemies) was restricted to damaged leaves. In conclusion, indirect defenses appear to show more specific responses to attacking herbivores than direct defenses in this woody plant. Electronic supplementary material The online version of this article (10.1007/s10886-019-01050-y) contains supplementary material, which is available to authorized users.

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Leaf volatile and nonvolatile metabolites show different levels of specificity in response to herbivory

Mezzomo,

Weinhold,

Aurová

et al. 2023

Ecology and Evolution

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Plants produce diverse chemical defenses with contrasting effects on different insect herbivores. Deploying herbivore‐specific responses can help plants increase their defensive efficiency. Here, we explore how variation in induced plant responses correlates with herbivore species, order, feeding guild, and level of specialization. In a greenhouse experiment, we exposed 149 plants of Salix fragilis (Linnaeus, 1753) to 22 herbivore species naturally associated with this host. The insects belonged to four orders (Coleoptera, Lepidoptera, Hemiptera, and Hymenoptera), three feeding guilds (external leaf‐chewers, leaf‐tying chewers, and sap‐sucking), and included both dietary specialists and generalists. Following herbivory, we quantified induced changes in volatiles and nonvolatile leaf metabolites. We performed multivariate analyses to assess the correlation between herbivore order, feeding guild, dietary specialization, chewing damage by herbivores, and induced responses. The volatile composition was best explained by chewing damage and insect order, with Coleoptera and Lepidoptera eliciting significantly different responses. Furthermore, we recorded significant differences in elicited volatiles among some species within the two orders. Variation in nonvolatile leaf metabolites was mainly explained by the presence of insects, as plants exposed to herbivores showed significantly different metabolites from controls. Herbivore order also played a role to some extent, with beetles eliciting different responses than other herbivores. The induction of volatile and nonvolatile leaf metabolites shows different levels of specificity. The specificity in volatiles could potentially serve as an important cue to specialized predators or parasitoids, increasing the efficacy of volatiles as indirect defenses. By contrast, the induction of nonvolatile leaf metabolites was largely unaffected by herbivore identity. Most nonvolatile metabolites were downregulated, possibly indicating that plants redirected their resources from leaves in response to herbivory. Our results demonstrate how diverse responses to herbivores can contribute to the diversity of plant defensive strategies.

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Beetle feeding induces a different volatile emission pattern from black poplar foliage than caterpillar herbivory

Cited by 13 publications

References 19 publications

Diaphorina citri Induces Huanglongbing-Infected Citrus Plant Volatiles to Repel and Reduce the Performance of Propylaea japonica

Diaphorina citri Induces Huanglongbing-Infected Citrus Plant Volatiles to Repel and Reduce the Performance of Propylaea japonica

Specificity of Herbivore Defense Responses in a Woody Plant, Black Poplar (Populus nigra)

Leaf volatile and nonvolatile metabolites show different levels of specificity in response to herbivory

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