Dem IPB wird erneut ein beispielhaftes Handeln im Sinne einer chancengleichheitsorientierten Personal- und Organisationspolitik bescheinigt. Das Institut erhält zum 6. Mal in Folge das TOTAL E-QUALITY…
Die Plant Science Student Conference (PSSC) wird seit 20 Jahren im jährlichen Wechsel von Studierenden der beiden Leibniz-Institute IPK und IPB organisiert. Im Interview erläutern Christina Wäsch…
Potato growing is severely threatened by the late blight agent Phytophthora infestans, which is usually controlled by massive amounts of fungicides. While variety resistance is often bypassed by the pathogen, the plant innate immunity opens the way to new biological plant protection tools e.g. the COS‐OGA elicitor. This oligosaccharide composition mimics the interaction between plants and fungal pathogens as it combines chitosan oligomers (COS) with pectin‐derived oligogalacturonides (OGA).Two different COS‐OGA elicitors were evaluated against potato late blight: FytoSave® mainly efficient against powdery mildews and FytoSol, a new composition still under development. Next to the evaluation of their protective effect, a comparative study of plant defense induction was performed focusing on the effect of repeated sprayings as well as on the stimulation of salicylic acid (SA), jasmonic acid and ethylene‐related pathways during the biotrophic and the necrotrophic growth stages of the pathogen.The FytoSave® elicitor strongly increased the SA content but failed to induce a sufficient protection against late blight while FytoSol maintained or even decreased the free SA content in presence of P. infestans and was completely efficient. Surprisingly, the necrotrophic development of P. infestans occurred along with a strong leaf accumulation of free SA and SA‐related transcripts. It may represent an attempt by P. infestans to divert plant defenses for its own benefit. Preventive sprayings with FytoSol but not FytoSave® completely impeded this hijacking. FytoSol seemed to keep the SA pathway under control, thereby preventing its diversion by P. infestans.