Chemical Ecology of Cave-Dwelling Millipedes: Defensive Secretions of the Typhloiulini (Diplopoda, Julida, Julidae)
AutoriMakarov, Slobodan E.
Vujisić, Ljubodrag V.
Antic, Dragan Z.
Mitic, Bojan M.
Anđelković, Boban D.
Lucic, Sofija Pavkovic
Tomić, Vladimir T.
Članak u časopisu (Objavljena verzija)
MetapodaciPrikaz svih podataka o dokumentu
Cave animals live under highly constant ecological conditions and in permanent darkness, and many evolutionary adaptations of cave-dwellers have been triggered by their specific environment. A similar "cave effect" leading to pronounced chemical interactions under such conditions may be assumed, but the chemoecology of troglobionts is mostly unknown. We investigated the defensive chemistry of a largely cave-dwelling julid group, the controversial tribe "Typhloiulini", and we included some cave-dwelling and some endogean representatives. While chemical defense in juliform diplopods is known to be highly uniform, and mainly based on methyl- and methoxy-substituted benzoquinones, the defensive secretions of typhloiulines contained ethyl-benzoquinones and related compounds. Interestingly, ethyl-benzoquinones were found in some, but not all cave-dwelling typhloiulines, and some non-cave dwellers also contained these compounds. On the other hand, ethyl-benzoquinones were not detected in trog...lobiont nor in endogean typhloiuline outgroups. In order to explain the taxonomic pattern of ethyl-benzoquinone occurrence, and to unravel whether a cave-effect triggered ethyl-benzoquinone evolution, we classed the "Typhloiulini" investigated here within a phylogenetic framework of julid taxa, and traced the evolutionary history of ethyl-benzoquinones in typhloiulines in relation to cave-dwelling. The results indicated a cave-independent evolution of ethyl-substituted benzoquinones, indicating the absence of a "cave effect" on the secretions of troglobiont Typhloiulini. Ethyl-benzoquinones probably evolved early in an epi- or endogean ancestor of a clade including several, but not all Typhloiulus (basically comprising a taxonomic entity known as "Typhloiulus sensu stricto") and Serboiulus. Ethyl-benzoquinones are proposed as novel and valuable chemical characters for julid systematics.
Ključne reči:Typhloiulini / Typhloiulus / Serboiulus / Lamellotyphlus / 2-ethyl-1,4-benzoquinone / quinone millipedes / chemical defense / chemosystematics
Izvor:Journal of Chemical Ecology, 2017, 43, 4, 317-326
- Springer, Dordrecht
- Ontogenetska karakterizacija filogenije bioraznovrsnosti (RS-173038)
- Bioaktivni prirodni proizvodi samoniklih, gajenih i jestivih biljaka: određivanje struktura i aktivnosti (RS-172053)
- University of Graz
- DOC fellowship of the Austrian Academy of Sciences, at the Institute of Zoology, University of Graz