The international conference on mycorrhiza (ICOM 10) was developed in Merida, Mexico from 30th of June till 5th of July. The meeting hosted almost 300 participants from 40 different countries. Our group was represented by Maarja Öpik, who presented a talk on arbuscular mycorrhizal fungi and species pool, Daniela Leon in her first participation on a conference as a PhD student, talked about community mycorrhization along a productivity gradient and Guillermo Bueno presented two talks on biogeography of plant mycorrhizal traits. In addition, he prepared a debate along with Maarja, Daniela and other international colleagues on identification of mycorrhizal plants. Overall, the conference presented several challenges around the topic of sustainability, where mycorrhizal symbiosis could be a key factor for the future of forestry, agriculture and nature conservation.