PhD defence

Odours from friends and foes: ecological consequences of volatiles from soil-borne fungi on plant growth and defence against herbivores

PhD candidate Kay K (Kay) Moisan MSc
Promotor prof.dr. M (Marcel) Dicke
Co-promotor prof. dr JM Raaijmakers
dr D Lucas Gomes Marques Barbosa
dr V Cordovez da Cunha
Organisation Wageningen University, Laboratory of Entomology

Fri 16 October 2020 11:00 to 12:30

Venue Aula, gebouwnummer 362


In soil, plants are exposed to harmful microbes that give disease (pathogens) and beneficial microbes that promote plant health. Interestingly, plants can perceive and respond to odours produced by microbes before contact. In my PhD thesis, I studied the chemical composition of odours emitted by pathogenic and non-pathogenic fungi in soil, and I studied the effects of these odours on plant development and resistance. I showed that odours from fungi, irrespective of their pathogenicity, can positively affect plant growth and accelerate flowering. Additionally, exposure of plant roots to these odours influenced subsequent plant interactions with herbivores, making sometimes plants more resistant to herbivores feeding on roots or leaves. Together, the findings of this study provide fundamental information on plant-fungus interactions, and highlight the ecological importance of such interactions for plant health. In the quest for sustainable agricultural practices, odours from soil microbes represent promising candidates for crop protection and stimulation.