Cuticular Chemistry of the Queensland Fruit Fly Bactrocera tryoni (Froggatt)

Park, Soo J.; Pandey, Gyanendra; Castro-Vargas, Cynthia; Oakeshott, John G.; Taylor, Phillip W.; Méndez, Vivian

doi:10.3390/molecules25184185

Cited by 11 publications

(9 citation statements)

References 119 publications

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“…The 13 tentatively identified compounds in female rectal glands comprised one amide, four fatty acid esters that had all also been tentatively identified in the male samples, plus six additional fatty acid esters, a spiroacetal and one additional alcohol. Only three of these 13, ( E , E )-2,8-dimethyl-1,7-dioxaspiro[5.5]undecane, n -propyl dodecanoate and methyl ( Z )-9-hexadecenoate, had previously been identified in female Qfly rectal glands [ 55 , 72 , 73 ], but four of the fatty acid esters (ethyl ( E )-9-tetradecenoate, n -propyl tetradecanoate, methyl hexadecanoate and ethyl 14-methylhexadecanoate) have been found in cuticular washes of mature adult female Qflies [ 76 ]. Our data therefore support the contention of Park et al that some cuticular chemicals could be produced in Qfly rectal glands and subsequently distributed over their wings and bodies during grooming [ 76 ].…”

Section: Resultsmentioning

confidence: 99%

Diversity and sex differences in rectal gland volatiles of Queensland fruit fly, Bactrocera tryoni (Diptera: Tephritidae)

et al. 2022

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Rectal gland volatiles are key mediators of sexual interactions in tephritid fruit flies. We used solid-phase microextraction (SPME) plus gas chromatography-mass spectrometry (GC-MS) and gas chromatography-flame ionization detection (GC-FID) to substantially expand rectal gland chemical characterisation of the Queensland fruit fly (Bactrocera tryoni (Diptera: Tephritidae); Qfly). The SPME GC-MS analysis identified 24 of the 30 compounds previously recorded from Qfly rectal glands, plus another 21 compounds that had not previously been reported. A few amides and fatty acid esters dominated the chromatograms of males and females respectively, but we also found other esters, alcohols and aldehydes and a ketone. The GC-FID analyses also revealed over 150 others, as yet unidentified, volatiles, generally in lesser amounts. The GC-FID analyses also showed 49 and 12 compounds were male- and female-specific, respectively, both in single sex (virgin) and mixed sex (mostly mated) groups. Another ten compounds were male-specific among virgins but undetected in mixed sex groups, and 29 were undetected in virgins but male-specific in mixed sex groups. The corresponding figures for females were four and zero, respectively. Most short retention time peaks (including a ketone and an ester) were male-specific, whereas most female-biased peaks (including five fatty acid esters) had long retention times. Our results indicate previously unsuspected diversity of rectal gland volatiles that might have pheromone functions in males, but far fewer in females.

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Section: Resultsmentioning

confidence: 99%

Diversity and sex differences in rectal gland volatiles of Queensland fruit fly, Bactrocera tryoni (Diptera: Tephritidae)

et al. 2022

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“…EL, EM, and EP have been found in Bactrocera correcta ( 33 ), Bactrocera oleae ( 34 ), Bactrocera frauenfeldi ( 35 ), Bactrocera musae ( 36 ) , Bactrocera bryoniae ( 37 ), and Bactrocera tryoni ( 38 ) female extracts. In addition, EL, EM, and EP were found in the cuticle of mature female B. tryoni , Bactrocera carambolae , Bactrocera papaya , Bactrocera philippinensis and Bactrocera invadens , with varying relative abundances among different species ( 39 , 40 ), suggesting that these compounds might have roles in chemical recognition. Notably, EL, EM, and EP elicited electrophysiological responses in male and female B. bryoniae ( 37 ) and B. oleae ( 34 ), but only EL elicited responses in male B. musae ( 36 ), which reveals the functional divergence of these fatty acid esters in different tephritid flies.…”

Section: Discussionmentioning

confidence: 99%

Female semiochemicals stimulate male courtship but dampen female sexual receptivity

Chen,

Zhang,

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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Chemical communication plays a vital role in mate attraction and discrimination among many insect species. Here, we document a unique example of semiochemical parsimony, where four chemicals act as both aphrodisiacs and anti-aphrodisiacs in different contexts in Bactrocera dorsalis . Specifically, we identified four female-specific semiochemicals, ethyl laurate, ethyl myristate, ethyl cis -9-hexadecenoate, and ethyl palmitate, which serve as aphrodisiacs to attract male flies and arouse male courtship. Interestingly, these semiochemicals, when sexually transferred to males during mating, can function as anti-aphrodisiacs, inhibiting the receptivity of subsequent female mates. We further showed that the expression of elongase11, a key enzyme involved in the biosynthesis of these semiochemicals, is under the control of doublesex, facilitating the exclusive biosynthesis of these four semiochemicals in females and guaranteeing effective chemical communication. The dual roles of these semiochemicals not only ensure the attractiveness of mature females but also provide a simple yet reliable mechanism for female mate discrimination. These findings provide insights into chemical communication in B. dorsalis and add elements for the design of pest control programs.

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“…Peak areas were calculated as above and quantitative analysis was performed on peak areas for every peak that was present in at least 50% of the samples in at least one of the four sex/mating history categories. Thirty seven of the peaks had previously been identified by matching equivalent extracts against authentic standards [47,57,61,125]. Other peaks were tentatively identified by detailed analysis of their spectra and comparison of their spectra with the NIST libraries of known compounds with similar KIs (MS Search version 2.3).…”

Section: Plos Onementioning

confidence: 99%

Genetic variation for rectal gland volatiles among recently collected isofemale lines and a domesticated strain of Queensland fruit fly, Bactrocera tryoni (Diptera: Tephritidae)

Castro-Vargas¹,

Pandey²,

Yeap³

et al. 2023

PLoS ONE

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Divergence between populations in mating behaviour can function as a potent premating isolating mechanism and promote speciation. However, very few cases of inherited intraspecific variation in sexual signalling have been reported in tephritid fruit flies, despite them being a highly speciose family. We tested for such variation in one tephritid, the Queensland fruit fly, Bactrocera tryoni (Qfly). Qfly mating behaviour depends on volatiles secreted from male rectal glands but no role for the volatiles from female rectal glands has yet been reported. We previously detected over 100 volatile compounds in male rectal glands and identified over 30 of them. Similar numbers were recorded in females. However, many compounds showed presence/absence differences between the sexes and many others showed quantitative differences between them. Here we report inherited variation among 24 Qfly lines (23 isofemale lines established from recent field collections and one domesticated line) in the abundance of three esters, two alcohols, two amides, an aldehyde and 18 unidentified volatiles in male rectal glands. We did not find any compounds in female rectal glands that varied significantly among the lines, although this may at least partly reflect lower female sample numbers. Most of the 26 male compounds that differed between lines were more abundant in the domesticated line than any of the recently established isofemale lines, which concurs with other evidence for changes in mating behaviour during domestication of this species. There were also large differences in several of the 26 compounds among the isofemale lines, and some of these differences were associated with the regions from which the lines were collected. While some of the variation in different compounds was correlated across lines, much of it was not, implicating involvement of multiple genes. Our findings parallel reports of geographic variation in other Qfly traits and point to inherited differences in reproductive physiology that could provide a basis for evolution of premating isolation between ecotypes.

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Cuticular Chemistry of the Queensland Fruit Fly Bactrocera tryoni (Froggatt)

Cited by 11 publications

References 119 publications

Diversity and sex differences in rectal gland volatiles of Queensland fruit fly, Bactrocera tryoni (Diptera: Tephritidae)

Diversity and sex differences in rectal gland volatiles of Queensland fruit fly, Bactrocera tryoni (Diptera: Tephritidae)

Female semiochemicals stimulate male courtship but dampen female sexual receptivity

Genetic variation for rectal gland volatiles among recently collected isofemale lines and a domesticated strain of Queensland fruit fly, Bactrocera tryoni (Diptera: Tephritidae)

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