Tomato roots metagenome
DNA was extracted from the samples using the DNeasy Power Soil Kit (QIAGEN, Germany). The concentration of genomic DNA was quantified using a fluorometer following the manufacturer's instructions (Qubit, Invitrogen, CA, USA). Subsequently, the DNA was sent to MACROGEN for V3-V4 hypervariable region amplification of the 16S rRNA genes, library generation, and sequencing (2  250 base pairs, PE250) using the HiSeq2500 platform (Illumina, CA, USA).