title: 16S rRNA sequencing of maize rhizosphere: zone3 of crown root
design: Different maize genotypes were sown in the field with normal fertilization for 4 weeks and then rhizosphere soil from the 2nd whorl of crown roots were dissected into three zones corresponding to root developmental zones. The genomic DNA was isolated from those rhizosphere soil and subjected to 16S rRNA gene V4 sequencing.