Gregory Roeder

Research interests

I have a broad interest in ecological interactions mediated through olfactory signals, within and among species. I aim to understand how volatile and semi-volatile organic compounds released, perceived, and processed by living organisms ultimately influence their behaviors and lead to multi-level adaptations. Particularly, I wish to bring to the fore the mechanisms, the strategies, the compromises, and the costs required when organisms share a same indispensable but limited resource.

Using a wide array of analytical equipment, our work focuses on how plants, insects, and vertebrates use chemical communication to interact with different members of their communities, in both natural and agricultural ecosystems.

Frequently, our scientific projects lead to collaborations and applications in the field of odor measurement and assessment


Main Topics

  • Chemical ecology
  • Chemical signals in vertebrates (http://avisdexperts.ch/videos/view/11071)
  • Aquatic chemical ecology
  • Evolution of plant defenses
  • Ecology of interactions
  • Artificial olfaction and sensitive sensors
  • Measurement and identification of odors and scents


Teaching Activities

Bachelor degree (biology, medicine, pharmaceutical sciences, sport and sciences)

  • Genetics
  • Medical Genetics
  • Problem-Based Learning in Medicine (general practice)
  • Chemical Ecology
  • Problem-Based Learning in Chemical Ecology

Master degree (biology)

  • Natural Substances Analyses
  • Basics in Chemical Ecology


EMBA. Executive Master of Business Administration (2018), University of Applied Sciences and Arts Western Switzerland.

CAS-SGE. Certificate of Advanced Studies in Business Management (2015), University of Applied Sciences and Arts Western Switzerland.

Postdoc. Chemical Ecology (2008-2010), University of Neuchâtel, Switzerland.

PhD. Biology (2007), University of Neuchâtel, Switzerland.

MSc. Sports (2006), University of Neuchâtel, Switzerland.

MSc. Biology (2004), University of Neuchâtel, Switzerland.



Moreira X, Abdala-Roberts L, Gols R, Lago-Núñez B, Rasmann S, Röder G, Soengas P, Vázquez-González C, Cartea M E (2023). Insect herbivory but not plant pathogen infection drive floral volatile-mediated indirect effects on pollinators and plant fitness in Brassica rapa. Journal of Ecology. doi: 10.1111/1365-2745.14242

Martín-Cacheda L, Vázquez-González C, Rasmann S, Röder G, Abdala-Roberts L, Moreira X (2023). Volatile-mediated signalling between potato plants in response to insect herbivory is not contingent on soil nutrients. Journal of Chemical Ecology. doi: 10.1007/s10886-023-01445-y

Chappuis L, Egger A, Röder G, Glauser G, Jaffuel G, Benrey B, Abdala-Roberts L, Clancy M, Turlings T C J, Bustos-Segura C (2023). Effects of experimental growth conditions on the chemical defences of two cotton species. Journal of Chemical Ecology. doi: 10.1007/s10886-023-01422-5

Vázquez-González C, Quiroga V, Martín-Cacheda L, Rasmann S, Röder G, Abdala-Roberts L, Moreira X (2023) Effect of herbivore load on VOC-mediated plant communication in potato. Planta. 257(42). doi: 10.1007/s00425-023-04075-6

Galmán A, Vázquez-González C, Röder G, Castagneyrol B (2022) Interactive effects of tree species composition and water availability on growth and direct and indirect defences in Quercus ilex. Oikos. doi: org/10.1111/oik.09125

Duhin A, Machado R A R, Turlings T C J, Röder G (2022) Early land plants: Plentiful but neglected resources for herbivores? Ecology and Evolution. doi: 10.1002/ece3.9617

Martín-Cacheda L, Vázquez-González C, Rasmann S, Röder G, Abdala-Roberts L, Moreira X (2022) Plant genetic relatedness and volatile-mediated signalling betweenSolanum tuberosum plants in response to herbivory by Spodoptera exigua. Phytochemistry. doi: 10.1016/j.phytochem.2022.113561

Vázquez-González C, Pombo-Salinas L, Martin-Cacheda L, Rasmann S, Röder G, Abdala-Roberts L, Mooney K, Moreira X (2022) Effect of water availability on volatile-mediated communication between potato plants in response to insect herbivory. Functional Ecology. doi: 10.1111/1365-2435.14159

Galmán A, Abdala-Roberts L, Wartalska P, Covelo F, Röder G, Szenteczki M A, Moreira X, Rasmann S (2021) Elevational gradients in constitutive and induced oak defences based on individual traits and their correlated expression patterns. Oikos. 130: 396-407. doi: 10.1111/oik.07588

Fattore S, Xiao Z, Godschalx A L, Röder G, Turlings T C J, Le Bayon RC, Rasmann S (2020) Bioturbation by endogeic earthworms facilitates entomopathogenic nematode movement toward herbivore‑damaged maize roots. Scientific Reports 10: 21316. https://doi.org/10.1038/s41598-020-78307-0

Schneeberger K, Röder G, Taborsky M (2020) The smell of hunger: Norway rats provision social partners based on odour cues of need. PLoS Biology. 18(3): e3000628. https://doi.org/10.1371/journal.pbio.3000628

Xu H, Zhou G, Dötterl S, Schäffler I, von Arx M, Röder G, Degen T, Chen L, Turlings TCJ (2019) The combined use of an attractive and repellent sex pheromonal component by a gregarious parasitoid. The Journal of Chemical Ecology. https://doi.org/10.1007/s10886-019-01066-4.

Kergunteuil A, Röder G, Rasmann S (2018) Environmental gradients and the evolution of tri-trophic interactions. Ecology Letters. doi: 10.1111/ele.13190.

Chiriboga X, Huijuan Guo H, Campos-Herrera R, Röder G, Imperiali N, Keel C, Maurhofer M, Turlings TCJ (2018) Root-colonizing bacteria enhance the levels of (E)-β-caryophyllene produced by maize roots in response to rootworm feeding. Oecologia. https://doi.org/10.1007/s00442-017-4055-5.

Canestrari D, Bolopo D, Turlings TCJ, Röder G, Marcos JM, Baglione V (2017) Formal comment to Soler et al.: Great spotted cuckoo nestlings have no antipredatory effect on magpie or carrion crow host nests in southern Spain. PLoS ONE 12(9): e0184446.

Xavier Chiriboga, Campos-Herrera R, Jaffuel G, Röder G, Turlings T C J (2017) Diffusion of the maize root signal (E)-β-caryophyllene in soils of different textures and the effects on the migration of the entomopathogenic nematode Heterorhabditis megidis. Rhizosphere. 3: 53-59.

Röder G, Mota M & Turlings T C J (2016) A unique host plant location strategy of an aquatic beetle. Aquatic Sciences. 79: 309-318.

Norghauer J M, Röder G & Glauser G (2015) Canopy gaps promote selective stem-cutting by small mammals of two dominant tree species in an African lowland forest. Journal of Tropical Ecology. 32: 1-21.

Röder G, Baglione V, Bolopo D, Marcos J M, Trnka A & Canestrari D (2015). Small emissions with big consequences: specialized malodorous avian defenses breed fluctuations in brood parasite-host interactions. Chemical Signals in Vertebrates. 13: 281-302.

Gotlieb A, Pisanty G, Rozen J G, Müller A, Röder G, Sedivy C & Praz C (2014). Nest, floral preferences, and immatures of Haetosmia vechti (Hymenoptera: Megachilidae: Osmiini). American Museum Novitates. No. 3808, 20 pp.

Röder G , Canestrari D, Bolopo D, Marcos J M, Villard N, Baglione V & Turlings T C J (2014). Chicks of the great spotted cuckoo may turn brood parasitism into mutualism by producing a foul-smelling secretion that repeals predators. The Journal of Chemical Ecology. Vol. 40, 320-324.

Canestrari D, Bolopo D, Turlings T C J, Röder G, Marcos J M & Baglione V (2014). From Parasitism to Mutualism: Unexpected Interactions Between a Cuckoo and Its Host. Science, Vol. 343, 1350-1352.

Li H-Y, Théron R, Röder G , Turlings T, Luo Y, Lange R F M, Ballif C & Perret-Aebi L-E (2012). Insights into the Encapsulation Process of Photovoltaic Modules: GCMS Analysis on the Curing Step of Poly(ethylene-co-vinyl acetate). Polymers & Polymer Composites, Vol. 20, No. 8.

Erb M, Balmer D, De Lange E, von Mérey G, Planchamp C, Robert C A M, Röder G et al. (2011). Synergies and trade-offs be­tween insect and pathogen resistance in maize leaves and roots. Plant Cell and Environment. 34: 1088-1103.

Röder G , Rahier M & Naisbit R E (2011). Do induced responses mediate the ecological interactions between the specialist herbivores and the phytopathogens of an alpine plant? PLoS ONE. 6: e19571.

Röder G , Rahier M & Naisbit R E (2008). Counter-intuitive developmental plasticity induced by host quality. Proceedings of the Royal Society B-Biological Science. 275: 879-885.

Röder G (2007). Ecological interactions between two species of leaf beetle, a rust fungus, and their host plant. Cyberthesis: http://doc.rero.ch/search.py?recid=8069&ln=fr

Röder G , Rahier M & Naisbit R E (2007). Coping with an antagonist: the impact of a phytopathogenic fungus on the develop­ment and behaviour of two species of alpine leaf beetle. Oikos. 116:1514-1523.

Roeder G (2003). Coleopteran biodiversity of Shipstern Nature Reserve in Belize, with a comparison of the fauna of two tropical forest types: http://www.shipstern.org/CMS/default.asp?ID=152&Language=EN


Gregory Roeder

Adjunct Professor


+41 32 718 31 33

Bureau D120