Identification of Fruit Volatiles from Green Hawthorn (Crataegus Viridis) and Blueberry Hawthorn (Crataegus Brachyacantha) Host Plants Attractive to Different Phenotypes of Rhagoletis Pomonella Flies in the Southern United States

Dong, H.; Powell, Thomas H. Q.; Feder, Jeffrey L.; Linn, Charles E.

doi:10.1007/s10886-011-0014-5

Cited by 19 publications

(25 citation statements)

References 19 publications

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“…texana ). Data were compiled from [13,15,16,30–32]. volatiledowny hawapplegreen hawblueberry haweastern mayhawwestern mayhawhybrid mayhawsouthern red hawbutyl butyrate1019.59126545propyl hexanoate41.51610.3butyl hexanoate0.01372416.825262320hexyl butyrate442416.8912614pentyl hexanoate52.5230.63-methyl-1-butanol450.624410.4butyl acetate5047579pentyl acetate3.526…”

Section: Introductionmentioning

confidence: 99%

Sensory specificity and speciation: a potential neuronal pathway for host fruit odour discrimination in Rhagoletis pomonella

et al. 2016

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Behavioural changes in habitat or mate choice can trigger population divergence, leading to speciation. However, little is known about the neurological bases for such changes. Rhagoletis pomonella (Diptera: Tephritidae) is a model for ecological speciation via host plant shifts. Within the past 180 years, Rhagoletis flies infesting hawthorn (Crataegus spp.) shifted to attack domesticated apple (Malus pumila). The two populations differ in their olfactory preferences for apple versus hawthorn fruit. Here, we looked for patterns of sensory organization that may have contributed to this shift by characterizing the morphology, specificity and distribution of olfactory sensory neurons (OSNs) on the antennae of Rhagoletis responding to host fruit and non-host volatiles. Of 28 OSN classes identified, two colocalized OSN pairs were found that specifically responded to the major behavioural attractant and antagonist volatiles for each fly population. A reversal in the response of these OSNs to fruit volatiles, either through a switch in receptor expression between these paired neurons or changes in neuronal projections in the brain, could therefore account for the behavioural difference between apple and hawthorn flies. The finding supports the hypothesis that relatively minor changes in olfactory sensory pathways may contribute to rapid host shifting and divergence in Rhagoletis.

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Section: Introductionmentioning

confidence: 99%

Sensory specificity and speciation: a potential neuronal pathway for host fruit odour discrimination in Rhagoletis pomonella

et al. 2016

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“…Recent studies on the response of AMF from different Crataegus spp. also confirm that AMF respond maximally to their natal fruit volatile blends and are relatively unresponsive to the alternative non-natal blends (Cha et al 2011a(Cha et al , b, 2012. This sharp behavioral distinction underscores the diversity of odor response phenotypes to host fruit odor in R. pomonella.…”

Section: Parameters Influencing Fruit Fly Response To Plant Stimulimentioning

confidence: 76%

Plant Odors as Fruit Fly Attractants

Quilici

Atiama-Nurbel

Brévault

2014

Trapping and the Detection, Control, and Regulation of Tephritid Fruit Flies

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Plant odors consist of a mixture of volatile compounds that are conveyed by diffusion through air and may disperse over a long distance. They play a major role in mediating insect-plant relationships, particularly food location and selection of suitable sites for mating or oviposition. This chapter presents state-of-the-art research on the response of fruit flies (Diptera, Tephritidae) to plant odors and their potential for the development of trapping systems. Main research results from Tephritids of economic importance (i.e., Rhagoletis, Ceratitis, Bactrocera/Dacus, and Anastrepha) show evidence of response to (i) general plant volatiles from host or non-host plants, the so-called 'green leaf volatiles', (ii) essential oils from host or non-host plants, and (iii) fruit odors (whole fruit, wounded or crushed fruit, extracts, etc.). Synergies between plant odors and food odors or sex pheromones are also addressed. Factors including insect physiology (age, mating status, egg load, etc.), experience (learning), and genetic background can substantially modify the response pattern to plant odors.One of the main challenges of using plant odors as fruit fly attractant is to improve the technology for identification (analysis), synthesis and emission (dispensers) of key compounds that may compete with natural volatile blends in the field. Further research should include the role of microorganisms in host location and recognition by fruit flies. Synthetic plant odors could be used either as kairomones for trapping systems, as allomones to push flies away from the crop or to disrupt host location, or as synomones to attract natural enemies to the crop.

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“…Full details of the methods used for headspace whole‐fruit volatile extract collection by ORBO32 activated charcoal filter traps (Supelco, Bellefonte, PA, USA), for gas chromatography‐mass spectrometry (GC–MS), and for coupled GC‐EAD are given in Cha et al. (,b). In brief, adsorbent collections for each sample of fruit were made over a 5‐day period at room temperature using the volatile trap.…”

Section: Methodsmentioning

confidence: 99%

“…The response of flies to host fruit volatiles was measured in a sustained‐flight tunnel using procedures as in previous studies with R. pomonella flies (Nojima et al., ; Linn et al., ,b; Cha et al., ,b). Results from previous R. pomonella flight tunnel studies using these procedures have been congruent with results from mark‐recapture studies on R. pomonella odour response behaviour in the field (Linn et al., , ; Forbes et al., ).…”

Section: Methodsmentioning

confidence: 99%

“…Adaptation to the diverse suite of southern Crataegus hosts infested by R. pomonella (Berlocher & Enquist, ) may have played a role in the subsequent evolution of the AP race in the northeastern USA. Some of these alternative Crataegus hosts have been shown to differ in their fruit volatile profiles, and flies infesting these different southern hawthorn species have been shown to preferentially behaviourally orient to their respective native host fruit volatiles (Cha et al., ,b). In addition, these southern hawthorn species – Crataegus aestivales (Walter), Crataegus opaca (Hook & Arn.…”

Section: Introductionmentioning

confidence: 99%

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Geographic variation in fruit volatiles emitted by the hawthorn Crataegus mollis and its consequences for host race formation in the apple maggot fly, Rhagoletis pomonella

Dong

Powell

Feder

et al. 2012

Entomologia Exp Applicata

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The shift of the apple (AP) maggot fly, Rhagoletis pomonella (Walsh) (Diptera: Tephritidae), from its ancestral host downy hawthorn, Crataegus mollis (DH) (Torr. & A. Gray) Scheele, to introduced domesticated AP, Malus domestica Borkh. (both Rosaceae), is a model for ecological divergence and incipient sympatric speciation with gene flow. However, a portion of the variation contributing to the sympatric host shift from DH to AP appears to have a different biogeographic history, pre‐dating the shift. One potential source of standing variation may trace to a number of different native hawthorn species infested by R. pomonella in the southern USA, where the AP‐attacking race is absent. Herein, we investigate this possibility for the southern red hawthorn (SR) endemic to Texas, Crataegus mollis var. texana (Buckl.), which has been described as a member of the Molles series that includes the more northern distributed DH. We report results from chemical analyses of host fruit volatiles, fly behavioural responses to synthetic fruit blends, and microsatellite surveys of fly populations, implying that R. pomonella infesting SR may behaviourally and genetically represent a native host race differing from the DH‐infesting fly. No fly reared from SR responded to AP fruit volatiles in flight tunnel assays. However, coupled gas chromatographic‐electroantennographic detection (GC‐EAD) profiles for SR fruit contain all five of the component esters that comprise the standard AP volatile blend inducing behavioural orientation for AP‐infesting flies, compounds that appear to be largely missing from volatile profiles for DH fruit. Thus, SR‐infesting flies do not represent a source for a preassembled AP‐accepting phenotype. However, they may help explain why the ancestral DH race that shifted to AP in the northeastern USA had the ability to recognize AP fruit esters, potentially enabling the shift to AP. Our results highlight how categorizing speciation into different geographic modes may not adequately describe the evolutionary origins of important genetic variation fuelling adaptive radiation and the genesis of new biodiversity.

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Identification of Fruit Volatiles from Green Hawthorn (Crataegus Viridis) and Blueberry Hawthorn (Crataegus Brachyacantha) Host Plants Attractive to Different Phenotypes of Rhagoletis Pomonella Flies in the Southern United States

Cited by 19 publications

References 19 publications

Sensory specificity and speciation: a potential neuronal pathway for host fruit odour discrimination in Rhagoletis pomonella

Sensory specificity and speciation: a potential neuronal pathway for host fruit odour discrimination in Rhagoletis pomonella

Plant Odors as Fruit Fly Attractants

Geographic variation in fruit volatiles emitted by the hawthorn Crataegus mollis and its consequences for host race formation in the apple maggot fly, Rhagoletis pomonella

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