Ladybird defence alkaloids: Structural, chemotaxonomic and biosynthetic aspects (Col.: Coccinellidae)

Daloze, Désiré; Braekman, Jean‐Claude; Pasteels, Jacques

doi:10.1007/bf01240602

Cited by 118 publications

(128 citation statements)

References 39 publications

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“…Precoccinelline is a well known alkaloid found in coccinellid beetles (9). Precoccinelline and another tricyclic alkaloid were recently reported from a Scheloribates species cultured in Japan (12).…”

Section: Resultsmentioning

confidence: 99%

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Oribatid mites as a major dietary source for alkaloids in poison frogs

Saporito

Donnelly²,

Norton³

et al. 2007

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

162

181

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Alkaloids in the skin glands of poison frogs serve as a chemical defense against predation, and almost all of these alkaloids appear to be sequestered from dietary arthropods. Certain alkaloid-containing ants have been considered the primary dietary source, but dietary sources for the majority of alkaloids remain unknown. Herein we report the presence of ≈80 alkaloids from extracts of oribatid mites collected throughout Costa Rica and Panama, which represent 11 of the ≈24 structural classes of alkaloids known in poison frogs. Forty-one of these alkaloids also occur in the dendrobatid poison frog, Oophaga pumilio , which co-occurs with the collected mites. These shared alkaloids include twenty-five 5,8-disubstituted or 5,6,8-trisubstituted indolizidines; one 1,4-disubstituted quinolizidine; three pumiliotoxins; and one homopumiliotoxin. All but the last of these alkaloid classes occur widely in poison frogs. In addition, nearly 40 alkaloids of unknown structure were detected in mites; none of these alkaloids have been identified in frog extracts. Two of these alkaloids are homopumiliotoxins, five appear to be izidines, four appear to be tricyclics, and six are related in structure to poison frog alkaloids that are currently unclassified as to structure. Mites are common in the diet of O. pumilio , as well as in the diets of other poison frogs. The results of this study indicate that mites are a significant arthropod repository of a variety of alkaloids and represent a major dietary source of alkaloids in poison frogs.

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Section: Resultsmentioning

confidence: 99%

“…Batrachotoxins occur in melyrid beetles (7), spiropyrrolizidines in siphonotid millipedes (8), and tricyclics in coccinellid beetles (9). However, only a small number of frog skin alkaloids have been associated with a specific putative dietary source.…”

mentioning

confidence: 99%

Oribatid mites as a major dietary source for alkaloids in poison frogs

Saporito

Donnelly²,

Norton³

et al. 2007

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

162

181

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“…For many species, including H. axyridis, aposematic colouration and intense smell of pyrazines provide additional protection from predation (Daloze et al 1995;Pasteels 2007;Ceryngier et al 2012;Pettersson 2012). Nevertheless, some animals can eat ladybirds, and these are usually generalist predators.…”

Section: Predators Of Harmonia Axyridismentioning

confidence: 99%

Predators and parasitoids of the harlequin ladybird, Harmonia axyridis, in its native range and invaded areas

et al. 2017

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“…GC-MS exhibits the least specificity, because chemical compounds are rarely unique to a single species. Ladybird alkaloids are often shared by a number of species, for example adaline in A. bipunctata and A. decempunctata (Daloze et al 1995) thus posing potential prey identification limitations if these species share a similar ecological distribution (Sloggett et al 2009). …”

Section: Prey Specificitymentioning

confidence: 99%

“…In GC-MS, distinctive prey chemicals or suites of chemicals are isolated from the predator in order to identify diet components (Knutsen and Vogt 1985;Becerro et al 2006). Because ladybirds possess taxonomically-specific defensive alkaloids (Daloze et al 1995), GC-MS of prey alkaloids in predator bodies is particularly appropriate for studying IGP of other ladybird species by H. axyridis (Hautier et al 2008;Sloggett et al 2009;Sloggett et al 2011) and to date are used in the only two published field studies on the ecological impact of H. axyridis (Hautier et al 2008;Hautier et al 2011). In addition to the above technique, the last decade has seen the development of a PCR DNA based approach to identifying the gut contents of predatory invertebrates (King et al 2008).…”

Section: Intraguild Predationmentioning

confidence: 99%

Detecting arthropod intraguild predation in the field

et al. 2011

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The process of biological control carries a distinct risk that an alien biological control agent (BCA) will become established as an invasive alien species with an associated threat to the local ecosystem biodiversity. It is imperative that a wide-ranging environmental risk assessment (ERA) is performed before the release of any BCA. This should include considering various potential but difficult to observe ecological interactions between the BCA and members of the native community, including disruption of intraguild relationships. Detection of intraguild predation (IGP) events involving predatory arthropods in the field can be done by analyzing their gut contents. Polymerase chain reaction (PCR) is a sensitive and specific tool to identify target prey DNA within a predator's gut. This paper reviews the efficiency of a DNA based approach for detecting IGP in the field, compared with detection by the use of monoclonal antibodies or gas chromatography. Prey specificity, detection times after prey consumption, capacity for quantification, multiple prey targeting and the time and costs involved in developing and using the different methods are considered.

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Ladybird defence alkaloids: Structural, chemotaxonomic and biosynthetic aspects (Col.: Coccinellidae)

Cited by 118 publications

References 39 publications

Oribatid mites as a major dietary source for alkaloids in poison frogs

Oribatid mites as a major dietary source for alkaloids in poison frogs

Predators and parasitoids of the harlequin ladybird, Harmonia axyridis, in its native range and invaded areas

Detecting arthropod intraguild predation in the field

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