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Cereal Symbiosis

Head of Group: Uta Paszkowski

Uta PaszcowskiThe mutually beneficial arbuscular mycorrhizal (AM) symbiosis is the most widespread association between roots of terrestrial plants and fungi of the Glomeromycota. The association receives increasing scientific attention because of the nutritional benefit it confers to plants, its ubiquitous occurrence among contemporary plant species and, as a result of its evolutionary antiquity, an ancestral relationship to other plant interactions.

Our research focuses on molecular mechanisms underlying the formation and functioning of AM symbioses in rice and maize. It aims at developing knowledge to optimize the incorporation of the AM-symbiosis into sustainable yet modern agricultural practices.

Current projects include:

Plant-Fungal rhizosphere dialogue
Rhizosphere communication

Establishment of AM symbioses relies on the continuous orchestration of signals to achieve recognition and coordination of the interacting organisms. We have identified genetic determinants of the rhizosphere dialogue from rice and maize. Their functional characterization will shed light on the communicative signal exchange, “sending” and “receiving”, that impacts on the plant’s reprogramming for symbiosis and therefore on the effectiveness of AM symbioses in rice and other cropping systems.

Rice Terraces
Rice terraces
Symbiotic phosphate acquisition

Phosphate (Pi) acquisition of crops via AM symbioses gains increasing importance due to limited Pi reserves and demand for environmentally sustainable agriculture. We found that 70% of the Pi acquired by aerobically- grown rice is delivered via the symbiotic route. We would like to understand the functioning and regulation of this pathway under laboratory and field conditions to exploit the symbiosis and develop rice cultivars better adapted to low-input rice agro-ecosystem.