Legacy effects of pre‐crop plant functional group on fungal root symbionts of barley

Arbuscular mycorrhizal (AM) fungi, a group of widespread fungal symbionts crops, could be important in driving crop yield across rotations through plant–soil feedbacks (PSF). However, whether preceding crops have legacy effect on the AM fungi subsequent is poorly known. We set up an outdoor mesocosm rotation experiment that consisted first phase growing either one four pre-crops establishing and/or rhizobial symbiosis or not (spring barley, faba bean, lupine, canola), followed by crop, winter barley. After pre-crop harvest, carbon-rich organic substrates were applied to test it attenuated, accentuated modified pre-crops. The status, but its affected richness and composition this difference, particular community composition, persisted increased roots was driven single symbiotic group, mixed crop-species-specific effect. This demonstrates has lasting effects communities may steer succession phases. sawdust amendment, wheat straw. Based previous observation decreased after pre-crops, our findings suggest negative PSF at level plant history communities, focus offers additional understanding PSF.