Thesis subject

Evolution of egg-killing in Brassicales

Members of the Brassicaceae family are known to express a hypersensitive response(HR)-like necrosis when cabbage white butterflies (Pieris sp.) lay eggs on their leaves. The plant responds with a local cell death in the leaf underneath the eggs that causes desiccation and even egg dropping. Consequently, eggs are killed before the insect larvae can hatch, preventing feeding damage to the plants. However, not all species express the HR-like necrosis in response to eggs, and the strength of the response seems to vary between and within species.

Start date

01/12/2020

End date

30/09/2024

In this project, we aim to understand when HR-like necrosis evolved in the Brassicales and if this is correlated with specific morphological and/or chemical adaptations to specialist herbivores. You will screen plant species from different families (Brassicaceae and Cleomecae) for the expression of HR after oviposition by P. brassicae. You will also link this to survival of the eggs and performance of the larvae on the same plants.