Phenotypic plasticity in host plant preference of the willow leaf beetle<i>Phratora vulgatissima</i>: the impact of experience made by adults

Austel, Nadine; Björkman, Christer; Hilker, Monika; Meiners, Torsten

doi:10.1111/afe.12071

Cited by 9 publications

(6 citation statements)

References 84 publications

(86 reference statements)

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“…This fast phenotypic plasticity is recorded in various generalist insects (e.g. Anderson & Anton, 2014;Austel et al, 2014;Proffi t et al, 2015). This phenomenon may have a considerable effect on agriculture.…”

Section: Discussionmentioning

confidence: 70%

Influence of prolonged dietary experience during the larval stage on novel odour preferences in adults of noctuid stem borer moths (Lepidoptera: Noctuidae)

Petit¹,

Ahuya²,

Rü³

et al. 2018

Eur. J. Entomol.

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In Lepidoptera, larval dietary experience of volatile cues can induce adult preference for these cues. However, such induction may require several generations, depending in part on the degree of specialization of the insects. In a previous study, using species of noctuid stem borers with different diet breadths, namely the polyphagous Sesamia nonagrioides, the oligophagous Busseola fusca and monophagous Busseola nairobica, it was shown that in S. nonagrioides, one generation was enough to induce a preference for vanillin in the resulting gravid females, whereas even two generations failed to induce a response in adults of Busseola spp. In this study, we checked whether a higher number of generations of exposure to a vanillin-enriched medium could induce a signifi cant olfactory preference for this medium in the species B. fusca and B. nairobica, which have narrower host-plant utilization ranges than S. nonagrioides. Larvae were reared to the adult stage on an artifi cial diet enriched with vanillin for periods of from 2 to 7 or 8 generations, followed by two-choice tests on gravid females using a Y-tube olfactometer. The results showed different responses according to the species: for the oligophagous B. fusca, there was no signifi cant effect of the conditioning, while a signifi cant preference for the odours emitted by this new vanillin-enriched diet was recorded for the polyphagous S. nonagrioides and monophagous B. nairobica, but after different numbers of generations. In conclusion, different diet breadths seem to be associated with different levels of plasticity in the odour preference of adults. The implication of this result for insects' adaptability in a changing landscape is discussed.

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Section: Discussionmentioning

confidence: 70%

Influence of prolonged dietary experience during the larval stage on novel odour preferences in adults of noctuid stem borer moths (Lepidoptera: Noctuidae)

Petit¹,

Ahuya²,

Rü³

et al. 2018

Eur. J. Entomol.

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“…However, the herbivore-induced GLV and benzenoid and homoterpene emissions in the mixed-gender damage treatment were significantly increased compared to undamaged plants, while in the single-gender damage treatments the increasing trend in induced GLV and homoterpene emissions was not significant. Phratora species are sensitive to changes in GLV composition in damaged plant emissions [38]. In the mixed-gender treatment, the overall homoterpene and GLV emission rates were also at a lower level in control plants, which might have partly affected the significance of the damage-induced increase.…”

Section: Discussionmentioning

confidence: 93%

“…Greater emissions of GLVs and homoterpenes from beetle-damaged than undamaged foliage could indicate a higher risk of within-species competition, higher leaf consumption rate due to competition [39], increased pressure by parasitoids [42,43] and predators [44,45] attracted by GLV and homoterpene emissions, and eventually overcrowding and food shortage in damaged foliage [46,47]. In terms of willows, it has been shown [38] that Phratora spp. adults have also capacity to learn to use the induced GLV compound composition to differentiate damaged and intact willow species.…”

Section: Discussionmentioning

confidence: 99%

Herbivore Gender Effects on Volatile Induction in Aspen and on Olfactory Responses in Leaf Beetles

Grauer-Gray

Holopainen

et al. 2020

Forests

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Hybrid aspen (Populus tremula × tremuloides Michx.) is a fast-growing tree species used for short-rotation forestry in northern latitudes. Aspen species have a rich herbivore fauna, including defoliating leaf beetles that induce emissions of volatile organic compounds (VOCs) when feeding on aspen leaves. We investigated the differential induction of VOCs by male and female Phratora laticollis leaf beetles feeding on hybrid aspen and the differences in the orientation of beetles in response to gender-specific induced VOCs. The hypotheses for the study were (1) the VOCs in the headspace of plants infested with beetles of the two genders individually and in mixed aggregates would vary subtly, and (2) foraging adult beetles would be able to detect differences in VOC blends and use them to fine-tune their orientation choices. In Y-tube bioassays, both females and males preferred VOCs from leaves damaged by one gender (females or males) over undamaged leaves. However, if leaves were damaged by a two-gender population, neither females nor males indicated a preference over volatiles of undamaged leaves. Leaves damaged by both beetle genders simultaneously had significantly increased green leaf volatile (GLV), benzenoid and homoterpene emissions compared to undamaged leaves. Emissions of these compounds possibly indicate higher herbivore pressure and a higher risk of attack by parasitoids and predators and could thus be the cause of the lack of beetle preference. Our findings provide new basic information on gender-based host plant selection by herbivores and may be helpful in the development of sustainable biogenic VOC-based herbivore-control methods for intensive short-rotation hybrid aspen production.

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“…Statistical comparison of feeding indices was conducted by a two‐sided Wilcoxon one sample test to zero (see also Austel, Björkman, Hilker, & Meiners, 2014; Büchel et al, 2014).…”

Section: Methodsmentioning

confidence: 99%

Chemical defence in Brassicaceae against pollen beetles revealed by metabolomics and flower bud manipulation approaches

Austel

Böttcher

Meiners

2020

Plant Cell & Environment

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Divergence of chemical plant defence mechanisms within the Brassicaceae can be utilized to identify means against specialized pest insects. Using a bioassay‐driven approach, we (a) screened 24 different Brassica napus cultivars, B. napus resyntheses and related brassicaceous species for natural plant resistance against feeding adults of the pollen beetle (Brassicogethes aeneus), (b) tested for gender‐specific feeding resistance, (c) analysed the flower bud metabolomes by a non‐targeted approach and (d) tested single candidate compounds for their antifeedant activity. (a) In no‐choice assays, beetles were allowed to feed on intact plants. Reduced feeding activity was mainly observed on Sinapis alba and Barbarea vulgaris but not on B. napus cultivars. (b) Males fed less and discriminated more in feeding than females. (c) Correlation of the metabolite abundances with the beetles' feeding activity revealed several glucosinolates, phenylpropanoids, flavonoids and saponins as potential antifeedants. (d) These were tested in dual‐bud‐choice assays developed for medium‐throughput compound screening. Application of standard compounds on single oilseed rape flower buds revealed highly deterrent effects of glucobarbarin, oleanolic acid and hederagenin. These results help to understand chemical plant defence in the Brassicaceae and are of key importance for further breeding strategies for insect‐resistant oilseed rape cultivars.

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Phenotypic plasticity in host plant preference of the willow leaf beetlePhratora vulgatissima: the impact of experience made by adults

Cited by 9 publications

References 84 publications

Influence of prolonged dietary experience during the larval stage on novel odour preferences in adults of noctuid stem borer moths (Lepidoptera: Noctuidae)

Influence of prolonged dietary experience during the larval stage on novel odour preferences in adults of noctuid stem borer moths (Lepidoptera: Noctuidae)

Herbivore Gender Effects on Volatile Induction in Aspen and on Olfactory Responses in Leaf Beetles

Chemical defence in Brassicaceae against pollen beetles revealed by metabolomics and flower bud manipulation approaches

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