Fig. 5

A The enrichment and depletion patterns of the root endophytes and leaf endophytes of Potentilla fruticosa var. albicans in GTZ (a, b), MR (d, e), and AM (g, h) when using rhizosphere soil as control. Each red and pink point represents an individual enriched OTU, while each blue point represents an individual depleted OTU (a, b, d, e, g, h). The enrichment and depletion patterns of the leaf endophytes of Potentilla fruticosa var. albicans in GTZ (c), MR (f), and AM (i) when using root endophytes as control. Each pink point represents an individual enriched OTU, while each red point represents an individual depleted OTU. The “Depletion index” (DI = The numbers of depleted OTUs / The numbers of enriched OTUs) defined by Xiong et al. (2020) was used to evaluate the selective effect degree of the plants to their associated bacteria, and higher DI value represents greater depletion effect. B Venn diagrams showing the shared and specific bacterial OTUs in different compartment niches within the significantly enriched OTUs and depleted OTUs (a–e). For these shared differential OTUs, only the top 3 taxonomies were shown. GTZ, MR, and AM represent the glacier terminus zone, moraine ridge, and alpine meadow, respectively