Figure 2.

Alpha diversity analysis of microbiomes in the roots of Cycas debaoensis and Cycas fairylakea. The datasets from three individuals for each root type and host species were pooled. Hence, coralloid and normal roots are coded as CD and ND for Cycas debaoensis, and CF and NF for Cycas fairylakea, respectively. The species richness and diversity of bacteria and fungi among these samples were analyzed with three different diversity indices. T-test revealed a statistically significant difference on the diversity of bacteria between root types (P < 0.05) but not with host species. The difference on the diversity of fungi between root types and host species was not significant (P ⩾ 0.05).