Herbicide metolachlor alters gene expression and reshapes the interaction between a bloom-forming cyanobacterium and its chytrid parasite

Metolachlor (MET) is among the most widely used herbicides worldwide and a common freshwater contaminant. Beyond direct toxicity, MET can reshape ecological interactions, including those between bloom-forming cyanobacteria and their chytrid parasites. Although MET is known to reduce chytrid fitness