Identifying the Specific Root Microbiome of the Hyperaccumulator Noccaea brachypetala Growing in Non-metalliferous Soils

Noccaea brachypetala is a close relative of caerulescens , model plant species used in metal hyperaccumulation studies. In previous survey the Catalan Pyrenees, we found two occidental and oriental N. populations growing on non-metalliferous soils, with accumulated high concentrations Cd Zn. Our hypothesis was that microbiome companion roots may influence ability these plants to absorb metals. We performed high-throughput sequencing bacterial fungal communities rhizosphere soil rhizoplane fractions. The rhizobiomes shoot ionomes were analyzed along those from other non-hyperaccumulator Brassicaceae at same sampling locations. analyses revealed richness abundance tended increase compared species, regardless location. confirmed root compartment key factor describing community composition linked cohabiting fraction contained specific rare taxa associated each species. harbored similar fungi hosts, but there notable reduction some taxa. Additionally, observed an enrichment hyperaccumulator previously described metal-tolerant bacteria involved nitrogen cycling. cycle could contribute indirectly phenotype by improving quality fertility. results indicate captures particular prokaryotic soil. This benefit extraction ions and/or improve nutrition. research identified satellite groups niche assist biological strategies heavy remediation.