Genomic DNA (gDNA) was extracted from rhizosphere and bulk sediment samples using the Soil DNA Kit (Omega Bio-Tek, USA), following the manufacturers instructions. DNA concentration and purity were evaluated using a NanoDrop 2000 spectrophotometer (Thermo Fisher Scientific, USA). Metagenomic libraries were sequenced on an Illumina NovaSeq 6000 platform , generating 150 bp paired-end reads.