Host expansion modifies activity of phosphatases in a legume store pest Acanthoscelides obtectus (Say)

Janković-Tomanić, Milena; Jovanović, Darka Šešlija; Savković, Uroš; Đorđević, Mirko; Stojković, Biljana; Lazarević, Jelica

doi:10.1016/j.jspr.2015.03.008

Cited by 12 publications

(13 citation statements)

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“…; Janković‐Tomanić et al. ). However, trade‐offs involving other unmeasured components of fitness, such as fecundity or mate acquisition, could have occurred and would not have been detected (Rova and Björklund ; Anderson et al.…”

Section: Discussionmentioning

confidence: 98%

“…Messina and Durham (2015) proposed two ways in which their assays could have been inadequate, which we reiterate here. First, the phenotypic assays focused on larval performance (survival, development time, and weight), as host-related trade-offs were expected to be mediated by larval digestive physiology (e.g., Desroches et al 1997;Janković-Tomanić et al 2015). However, trade-offs involving other unmeasured components of fitness, such as fecundity or mate acquisition, could have occurred and would not have been detected (Rova and Björklund 2011;Anderson et al 2014).…”

Section: Discussionmentioning

confidence: 99%

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Genomic evidence that resource-based trade-offs limit host-range expansion in a seed beetle

2016

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Trade-offs have often been invoked to explain the evolution of ecological specialization. Phytophagous insects have been especially well studied, but there has been little evidence that resource-based trade-offs contribute to the evolution of host specialization in this group. Here, we combine experimental evolution and partial genome resequencing of replicate seed beetle selection lines to test the trade-off hypothesis and measure the repeatability of evolution. Bayesian estimates of selection coefficients suggest that rapid adaptation to a poor host (lentil) was mediated by standing genetic variation at multiple genetic loci and involved many of the same variants in replicate lines. Sublines that were then switched back to the ancestral host (mung bean) showed a more gradual and variable (less repeatable) loss of adaptation to lentil. We were able to obtain estimates of variance effective population sizes from genome-wide differences in allele frequencies within and between lines. These estimates were relatively large, which suggests that the contribution of genetic drift to the loss of adaptation following reversion was small. Instead, we find that some alleles that were favored on lentil were selected against during reversion on mung bean, consistent with the genetic trade-off hypothesis.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Genomic evidence that resource-based trade-offs limit host-range expansion in a seed beetle

2016

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“…Artificially-induced host shifts from beans to chickpeas has been shown to cause changes in the physiology and life history traits of A . obtectus [ 19 , 20 ]. After the 1 st instar larvae have entered the seed, their development is determined by the chemical composition of the endosperm, which is reflected in the difference in life history and physiological traits between bean- and chickpea-reared A .…”

Section: Discussionmentioning

confidence: 99%

“…Short-term (plastic) effects of host shift were also observed on certain physiological properties. For example, one-generation shift from bean to chickpea significantly increased the activity of phosphatase enzymes [ 20 ] and altered cuticular hydrocarbon profiles [ 15 ], reflecting immediate plastic responses to nutritional changes. Chemical communication in A .…”

Section: Introductionmentioning

confidence: 99%

Host shift induces changes in mate choice of the seed predator Acanthoscelides obtectus via altered chemical signalling

et al. 2018

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The mechanisms of host shift in phytophagous insects are poorly understood. Among the many proposed processes involved, sexual selection via semiochemicals has recently been suggested. This hypothesizes that sexual communication using pheromones is modified as a result of development on a new host, and such plant-induced phenotypic divergence in mate recognition cues can lead to reproductive isolation between host lines. We tested this hypothesis on Acanthoscelides obtectus, an oligophagous bruchid of Phaseolus vulgaris beans worldwide, which also develops in acceptable non-hosts, such as chickpea (Cicer arietinum L.). Male sex pheromone blends of the bean, chickpea and chickpea/bean host lines during artificially induced host shifts showed different composition. Bean-reared females did not distinguish between blends, whereas chickpea and chickpea/bean females preferred the chickpea male pheromone. However, electrophysiological (EAG) responses to male odour of antennae of the three female host lines were similar, all preferring bean-reared males. Egg-laying choice tests revealed a uniform preference for bean seeds across female host lines, even after multiple generations, whereas larvae did not distinguish between bean and chickpea seeds. We conclude that the development of divergent chemical signalling systems during host shifts does not facilitate the evolution of host races in A. obtectus, because oviposition preferences remain unaffected.

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“…Although oviposition preference and larval performance likely are governed by different gene complexes [4,51,52], there must be genetic covariance between preference and performance to adapt to a new plant species [53,54]. Egg-laying should be accompanied by physiological adaptation of larvae to handle compounds metabolically once they are inside seeds [55,56]. Unless preadaptation played a role [57], host-shift with the bean weevil is not probable.…”

Section: Evolutionary Considerationsmentioning

confidence: 99%

How bean weevil (Acanthoscelides obtectus, Coleoptera, Bruchinae) larvae die on legume seeds

Szentesi

2020

Preprint

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Background The host specificity of the dry bean weevil, Acanthoscelides obtectus Say (Coleoptera: Bruchinae), a seed predator of beans, is not properly known. Occasional use of leguminous seeds other than beans is reported, however the sphere of possible wild and cultivated hosts is uncertain. Female oviposition preference and larval performance relationship is complicated by the respective importance of seed coat and cotyledon, because paradoxically, females must exercise oviposition preference on the basis of stimuli provided by the seed coat alone, without directly being able to assess the quality of cotyledon’s suitability for larval development.Results Host specificity and host range investigations carried out on seeds of 62 grown and naturally occurring legume species and 82 cultivars of Phaseolus, Pisum, Glycine, Lens and others in Hungary, using no-choice tests for egg-laying, and intact or pierced seed coat for larval development in seeds, showed that there were 18 plant species (35% of them Lathyrus) that supported larval development to adults, however, only nine species (4 of 17 Glycine max accessions, Vigna unguiculata, V. angularis, Phaseolus vulgaris, Ph. coccineus, Cicer arietinum, Vicia faba, Lathyrus sativus and 13 of 27 Pisum sativum accessions) allowed it if the seed coat was intact. Furthermore, there was no overall positive correlation between oviposition preference and larval performance, with the exception for the so-called acceptable non-hosts (Kendall’s τ = 0.3088). Bean weevil females also demonstrated an ovipositional hierarchy of legume species even in no-choice tests.Conclusions Host range expansion is not probable with the bean weevil, primarily because it would require the recognition of basically different oviposition substrates (pods) among outdoor conditions.

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Host expansion modifies activity of phosphatases in a legume store pest Acanthoscelides obtectus (Say)

Cited by 12 publications

References 31 publications

Genomic evidence that resource-based trade-offs limit host-range expansion in a seed beetle

Genomic evidence that resource-based trade-offs limit host-range expansion in a seed beetle

Host shift induces changes in mate choice of the seed predator Acanthoscelides obtectus via altered chemical signalling

How bean weevil (Acanthoscelides obtectus, Coleoptera, Bruchinae) larvae die on legume seeds

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