Total_fer4-7 (CRX1726463; CRA025116)
Total DNA was extracted from leaf samples using a MagPure Soil DNA LQ Kit (Magen, China) according to the manufacturer's instructions. PCR amplification of the v5/v6 region of the 16S rRNA gene was performed using primers 799F/1193R (see Supplementary Table 1) and Tks Gflex DNA Polymerase (Takara, Japan).