Orfamide-A-mediated bacterial-algal interactions involve specific Ca2+ signalling pathways

The antagonistic bacterium Pseudomonas protegens secretes the cyclic lipopeptide orfamide A, which triggers a Ca2+ signal, causing the deflagellation of the green microalga Chlamydomonas reinhardtii . By investigating targeted synthetic orfamide A variants and inhibitors, we found that at least two Ca2+-signalling pathways and TRP channels are involved in this response. ### Competing Interest Statement The authors have declared no competing interest.