Conclusions
Overall, this study improved the resolution of root-associated niches
harbouring microorganisms by identifying the importance of different
segments along the longitudinal axis within one root system. Modulating
the endophyte communities at the root tip by root exudation was
associated with the genetic variation in phenology of the host plant.
Across different soil types, the rhizosphere soil architecture
potentially explained the diversity of microbial consortia at the basal
root. Our findings demonstrate that longitudinal niche differentiation
within a root architecture is an essential feature influencing the
rhizobiome development. The plant root metabolism and microbial
functions corresponding to plant growth, nutrients cycling, and plant
health will be the objective of the future research.