Regulatory networks in stress-induced plant ageing

We study the molecular mechanisms of stress-induced leaf senescence in plants. Specifically, we aim to resolve the following scientific questions:
1) How does mitochondrial dysfunction elicit leaf senescence?
2) What are the molecular mechanisms that regulate the transition to senescence?
3) Can the basic understanding of senescence in model species be translated to increase the post-harvest quality of crops?

Genetic toolboxes available for the model plant Arabidopsis thaliana, together with non-targeted and targeted proteomics, biochemical analysis and metabolomics will be utilized to gain basic understanding of the metabolic and regulatory networks. Translational studies on kale (Brassica oleracea convar acephala) varieties will allow testing the hypothesis in a relevant crop species. Increased understanding of post-harvest senescence will provide prospects for improving the post-harvest quality of leafy greens.

Stress-induced plant ageing can significantly deteriorate the quality of vegetables and cause significant losses in the food chain, but the underlying biochemical processes remain poorly understood. We aim to fill this knowledge gap and uncover the molecular mechanisms behind stress-induced ageing in model and crop species. We take advantage of the model plant Arabidopsis thaliana and various genetic and biochemical methods to study the basic molecular mechanisms of ageing. The new understanding is tested in different varieties of kale (Brassica oleracea convar acephala), which is a nutritious leafy vegetable and an important crop species. The results of this project will help improving the post-harvest quality of leafy greens.