Unlocking a high bacterial diversity in the coralloid root microbiome from the cycad genus Dioon.

ABSTRACT: Cycads are among the few plants that have developed specialized roots to host nitrogen-fixing bacteria. We describe the bacterial diversity of the coralloid roots from seven Dioon species and their surrounding rhizosphere and soil. Using 16S rRNA gene amplicon sequencing, we found that all coralloid roots are inhabited by a broad diversity of bacterial groups, including cyanobacteria and Rhizobiales among the most abundant groups. The diversity and composition of the endophytes are similar in the six Mexican species of Dioon that we evaluated, suggesting a recent divergence of Dioon populations and/or similar plant-driven restrictions in maintaining the coralloid root microbiome. Botanical garden samples and natural populations have a similar taxonomic composition, although the beta divers

SUBMITTER: Suarez-Moo PJ 

PROVIDER: S-EPMC6364921 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature