Phyllosphere Microbial Interactions and Community Dynamics

The phyllosphere—the aerial surfaces of plants—hosts diverse microbial communities that profoundly influence plant physiology, health and ecosystem processes. These assemblages comprise bacteria, fungi, archaea and viruses that colonise leaf surfaces (epiphytes) or penetrate internal tissues (endophytes). Community composition is shaped by host species identity, environmental variables such as humidity and light, seasonal progression and stochastic colonisation from soil or the atmosphere. Interactions among phyllosphere inhabitants range from competition for scarce nutrients and physical niches to facilitation through metabolic cross‐feeding and mutual modulation of host defences. Advances in high‐throughput sequencing, genome‐scale metabolic modelling and gnotobiotic plant systems have revealed that a relatively small set of core taxa recur across diverse hosts, yet peripheral members impart critical functions under stress conditions. Spatial heterogeneity at the microscale—leaf topology, stomatal distribution and cuticular chemistry—further modulates resource availability and competition outcomes. Phyllosphere microbes contribute to the regulation of trace gases, degradation of atmospheric pollutants and enhancement of photosynthetic efficiency, offering prospects for sustainable agriculture, biocontrol of pathogens and improved resilience of bioenergy crops in the face of climate change.

Research from Nature Portfolio

Seasonal assembly and core membership of leaf communities on perennial biofuel crops have been characterised through dense temporal sampling of switchgrass and miscanthus leaves. Studies reveal that nearly all leaf‐associated bacterial and archaeal taxa are detectable in the soil reservoir, yet non‐random patterns of colonisation indicate active ecological filtering by the leaf surface. Core taxa cluster into early, mid and late‐season groups that are reproducible across years and crop species. These findings underscore the potential to manipulate resident microbiomes at defined phenological stages to boost biomass production and stress tolerance.

Phyllosphere Microbial Interactions and Community Dynamics publication trend

The graph below shows the total number of articles in phyllosphere microbial interactions and community dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

Phyllosphere: The total above-ground surfaces of plants, primarily leaves, colonised by microorganisms.

Epiphyte: A microbe that resides on the external surfaces of leaves without penetrating host tissues.

Endophyte: A microorganism that lives within plant tissues, often conferring benefits such as enhanced stress tolerance.

Gnotobiotic system: A controlled experimental setup in which plants are inoculated with known microbial communities under sterile conditions.

Ecological filtering: The selective process by which the host environment and abiotic factors determine which microbial taxa successfully colonise and persist.

References

1. Phyllosphere Microbiome. Annual Review of Plant Biology (2023).
2. Tillandsia landbeckii phyllosphere and laimosphere as refugia for bacterial life in a hyperarid desert environment. Microbiome (2023).
3. Metabolic resource overlap impacts competition among phyllosphere bacteria. The ISME Journal: Multidisciplinary Journal of Microbial Ecology (2023).
4. Assembly and seasonality of core phyllosphere microbiota on perennial biofuel crops. Nature Communications (2019).
5. Pivotal roles of phyllosphere microorganisms at the interface between plant functioning and atmospheric trace gas dynamics. Frontiers in Microbiology (2015).