rhizobiome
The rhizobiome refers to the complex community of microorganisms—bacteria, fungi, archaea, and other microbes—that colonize the rhizosphere, the narrow zone of soil surrounding and influenced by plant roots. These microbial communities play critical roles in plant health, mediating nutrient cycling, nitrogen fixation, and pathogen suppression in ways that directly affect plant growth and stress tolerance. Understanding the rhizobiome is central to plant science because manipulating these microbial interactions offers pathways to improve crop resilience, soil fertility, and sustainable agriculture.
open_in_new WikipediaPubMed · 2026-04-05
Scientists discovered that the bacteria living in and around the roots of a heavy-metal-tolerant alpine plant are specially adapted to the toxic soils the plant grows in — and that the plant itself actively shapes which microbes thrive there, sometimes more powerfully than the metal pollution does.
The plant compartment (roots vs. surrounding soil) was the primary driver of overall microbial community function, outweighing soil metal levels in some cases.
Genes for cobalt-zinc-cadmium efflux and copper transport were significantly enriched in microbes at metal-polluted sites compared to clean sites.
Zinc-transporter genes (ZIP proteins) were specifically enriched in the rhizosphere of this zinc-hyperaccumulating plant, suggesting the plant recruits microbes that help it absorb zinc.