This study provides information on the tripartite symbiotic relationships formed by arbuscular
mycorrhizal fungi (AMF) and dark septate endophytes (DSE) in crops growing in the semiarid
region of the Canadian Prairie. We found the symbiotic root systems of wheat, pea, chickpea and
lentil to be morphologically distinct. The relationship between DSE and AMF abundance in roots
ranged from negative in lentil to positive in wheat.