Differences in soil microbial community structure and assembly processes under warming and cooling conditions in an alpine forest ecosystem

Leaf Health Status Regulates Endophytic Microbial Community Structure, Network Complexity, and Assembly Processes in the Leaves of the Rare and Endangered Plant Species Abies fanjingshanensis

“…Third, most leaf-colonizing endophytic microbes are more likely to be horizontally transmitted, with the main routes being from the plant roots and from the phyllosphere [78,79]. A high transpiration stream and stomatal number may increase the possibility of the movement and successful establishment of endophytic microbes [80,81], which is why we observed slightly higher m values in healthy leaves than in non-healthy leaves, and this finding is supported by the previous studies showing that a high dispersal rate may enhance the relative importance of stochastic processes [27,82]. However, in this study, we collected samples of leaves with only two health statuses, and further research on the complete process by which leaves progress from healthy to dead is needed to explore the balance between stochastic and deterministic processes in endophytic microbial communities as leaves decline.…”

“…Our NCM analysis demonstrated that the contribution of stochastic processes to leaf endophytic bacterial community assembly was greater than that to leaf endophytic fungal community assembly. Numerous previous studies have also pointed out that stochastic processes play a prominent role in shaping bacterial community assembly and that the fungal community is governed by deterministic processes in both soil and roots [25,27,28]. A reason for these observations could be that smaller microbes (e.g., bacteria) with higher dispersal rates are largely influenced by stochastic processes, whereas larger organisms (e.g., fungi) with more limited dispersal ability increase the importance of environmental filtering in determining microbial community assembly [74].…”

“…Deterministic processes are niche-based and determine community assembly through environmental filtering and interspecies interactions, whereas stochastic processes highlight that microbial communities are governed by the largely random processes of birth-death events, ecological drift, and probabilistic dispersal according to neutral theory [22,23]. A large body of literature has demonstrated the assembly processes of belowground soil and root-associated microbial communities in a variety of terrestrial ecosystems [24][25][26][27][28], but the relative importance of deterministic and stochastic processes in microbial community assembly may vary in different ecological niches, i.e., from the bulk and rhizosphere soils to the roots and leaves of host plants [26,29]. For plant endophytic microbial communities, the microenvironment of different plant tissues appears to be one of the most important factors responsible for determining which microbes can colonize internal tissues [30].…”

Soil fungal community structure and function response to rhizoma perennial peanut cultivars

“…Soil microbial communities are generally influenced by climatic and soil factors [ 26 , 27 ], but fine-scale assembly patterns in microbial communities are closely associated with host plant characteristics such as root exudates and root morphology. Due to the differences in root structure and exudates [ 28 ], volatile organic compounds [ 29 ], and quality and quantity of carbon input [ 30 ], different plant species or genotype can serve to induce specific taxa of microbial communities in their rhizosphere and recruit symbiotic organisms to roots.…”